@misc{DuemigVesteHagedornetal., author = {D{\"u}mig, Alexander and Veste, Maik and Hagedorn, Frank and Fischer, Thomas and Lange, Philipp and Spr{\"o}te, Roland and K{\"o}gel-Knabner, Ingrid}, title = {Biological soil crusts on initial soils: organic carbon dynamics and chemistry under temperate climatic conditions}, series = {Biogeosciences Discussion}, volume = {10}, journal = {Biogeosciences Discussion}, number = {1}, issn = {1810-6285}, pages = {851 -- 894}, language = {en} } @incollection{VesteBoehm, author = {Veste, Maik and B{\"o}hm, Christian}, title = {Nachhaltige Holzproduktion in der Agrarlandschaft}, series = {Agrarholz - Schnellwachsende B{\"a}ume in der Landwirtschaft : Biologie - {\"O}kologie - Management}, booktitle = {Agrarholz - Schnellwachsende B{\"a}ume in der Landwirtschaft : Biologie - {\"O}kologie - Management}, editor = {Veste, Maik and B{\"o}hm, Christian}, publisher = {Springer Spektrum}, address = {Berlin [u.a.]}, isbn = {978-3-662-49930-6}, doi = {10.1007/978-3-662-49931-3_1}, pages = {1 -- 16}, language = {de} } @misc{SproeteFischerVesteetal., author = {Spr{\"o}te, Roland and Fischer, Thomas and Veste, Maik and Raab, Thomas and Wiehe, Wolfgang and Lange, Philipp and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Biological topsoil crusts at early successional stages on Quaternary substrates dumped by mining in Brandenburg, NE Germany}, series = {Geomorphologie: relief, processus, environnement}, volume = {16}, journal = {Geomorphologie: relief, processus, environnement}, number = {4}, issn = {1957-777X}, doi = {10.4000/geomorphologie.8083}, pages = {359 -- 370}, abstract = {The influence of biological soil crusts in natural ecosystems on structures and processes is well investigated. However, in South-Brandenburg (Germany), it is possible to study the development of biological soil crusts (BSC) during initial ecosystem genesis on two artificial water catchments with well-known ages and under differing starting conditions. The two experimental sites are located in the recultivation area of the lignite open-cast mining district of southern Brandenburg with a distance of approximately 1 km between them. Two different topographies were constructed at the experimental sites: the experimental plot at the catchment Neuer Lugteich was shaped like a dune, whereas the artificial water catchment H{\"u}hnerwasser was modelled as an inclined slope. The catchment Neuer Lugteich is four years older than H{\"u}hnerwasser. The original substrate at Neuer Lugteich is more sandy and carbonate-free compared to the original substrate dumped at H{\"u}hnerwasser. At both sites geomorphological differentiation and crust development were compared and the importance of substrate-dependent water availability and crust type clarified. Once settled, the crusts influenced the water regime of the soils by delaying infiltration through enhanced water repellency, and by limiting water infiltration. Chlorophyll analysis revealed that all crusts were at early stages of development. At Neuer Lugteich, the establishment of the biological soil crusts was closely associated with the vegetation succession, whereas no clear succession of the crusts could be observed at H{\"u}hnerwasser. The mosaic-like pattern of the biological soils crusts is associated with the distribution of fine-grained material here.zeige weniger}, language = {en} } @misc{DuemigVesteHagedornetal., author = {D{\"u}mig, Alexander and Veste, Maik and Hagedorn, Frank and Fischer, Thomas and Lange, Philipp and Spr{\"o}te, Roland and K{\"o}gel-Knabner, Ingrid}, title = {Organic matter from biological soil crusts induces the initial formation of sandy temperate soils}, series = {Catena}, volume = {122}, journal = {Catena}, doi = {10.1016/j.catena.2014.06.011}, pages = {196 -- 208}, abstract = {Different development stages of algae-dominated and moss-dominated biological soil crusts (BSCs) were sampled on a natural sand dune (b17 years old) and on an experimental sand dune (b8 years old) along a catena, including gradients of vegetation cover, location on the slope, as well as composition and thickness of BSC organisms in northeastern Germany. The accumulation of BSC-derived organic carbon (OC)was determined for bulk materials and fractions less than 63 μm. The OC composition was characterized by solid-state 13C NMR spectroscopy and the carbohydrate-C signature. 14C contents were determined to assess the origin and dynamics of OC. From the radiocarbon contents, two OC pools were differentiated: recent BSC-derived and lignite-derived "old" OC. Downward movement of OC into the underlying substratewas found only undermoss-dominated BSCs at the old sand dune. BSC-derived OC was mainly composed of carbohydrate-C and, to a lesser extent, alkyl C and N-alkyl C, with considerably higher contributions of alkyl C in the young dune, indicating differences in the composition of extracellular polymeric substances produced by the BSCs with age. This is consistent with higher proportions of water-soluble OC of moss-dominated BSCs at the old dune, which is leached in the underlying substrate and initiates soil formation. Because of the channeling effect of mosses, OC depth translocation along with suspended colloidal substances contribute to OC accumulation in substrates.}, language = {en} } @inproceedings{SproeteFischerVesteetal., author = {Spr{\"o}te, Roland and Fischer, Thomas and Veste, Maik and Lange, Philipp and Bens, Oliver and Raab, Thomas and H{\"u}ttl, Reinhard F.}, title = {Hydrophobicity in sandy soils triggered by the development of Scots Pine stands in southern Brandenburg, Germany}, series = {EGU General Assembly 2010, held in Vienna, Austria, 02 - 07 May 2010}, booktitle = {EGU General Assembly 2010, held in Vienna, Austria, 02 - 07 May 2010}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{SproeteFischerVesteetal., author = {Spr{\"o}te, Roland and Fischer, Thomas and Veste, Maik and Yair, Aaron and Wiehe, Wolfgang and Lange, Philipp and Bens, Oliver and Raab, Thomas and H{\"u}ttl, Reinhard F.}, title = {Structures and processes of biological soil crusts during initial ecosystem genesis of an artificial watershed in Lusatia, NE Germany}, series = {EGU General Assembly 2010, held Vienna, Austria, 02 - 07 May 2010}, booktitle = {EGU General Assembly 2010, held Vienna, Austria, 02 - 07 May 2010}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{SproeteVesteFischeretal., author = {Spr{\"o}te, Roland and Veste, Maik and Fischer, Thomas and Raab, Thomas and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Development of biological soil crusts and their influence on soil hydrology in the recultivation area of lignite open-cast mining district in Lower Lusatia (Germany)}, series = {EGU General Assembly 2012, held 22-27 April, 2012 in Vienna}, booktitle = {EGU General Assembly 2012, held 22-27 April, 2012 in Vienna}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{FischerSproeteVesteetal., author = {Fischer, Thomas and Spr{\"o}te, Roland and Veste, Maik and Wiehe, Wolfgang and Lange, Philipp and Bens, Oliver and Raab, Thomas and H{\"u}ttl, Reinhard F.}, title = {Functions of biological soil crusts on central European inland dunes:Water repellency and pore clogging influence water infiltration}, series = {EGU General Assembly 2010, held in Vienna, Austria, 02 - 07 May 2010}, booktitle = {EGU General Assembly 2010, held in Vienna, Austria, 02 - 07 May 2010}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{SproeteFischerVesteetal., author = {Spr{\"o}te, Roland and Fischer, Thomas and Veste, Maik and Wiehe, Wolfgang and Lange, Philipp and H{\"u}ttl, Reinhard F.}, title = {Development of top soil on quaternary inland dunes - How important are microorganisms?}, series = {Gletscher, Wasser, Mensch - quart{\"a}rer Landschaftswandel im peribaltischen Raum, 35. Hauptversammlung der DEUQUA e.V., 12th Annual Conference of the INQUA PeriBaltic Working Group, 13.-17.9.2010., Greifswald}, booktitle = {Gletscher, Wasser, Mensch - quart{\"a}rer Landschaftswandel im peribaltischen Raum, 35. Hauptversammlung der DEUQUA e.V., 12th Annual Conference of the INQUA PeriBaltic Working Group, 13.-17.9.2010., Greifswald}, publisher = {Lehrstuhl Physische Geographie, Inst. f{\"u}r Geographie und Geologie der Univ. Greifswald}, address = {Greifswald}, pages = {163 -- 164}, language = {en} } @inproceedings{SproeteVesteFischeretal., author = {Spr{\"o}te, Roland and Veste, Maik and Fischer, Thomas and Lange, Philipp and Bens, Oliver and Raab, Thomas and H{\"u}ttl, Reinhard F.}, title = {Wie beeinflussen Kiefern (Pinus sylvestris L.) die Entwicklung der Benetzungshemmung auf Sandb{\"o}den?}, series = {B{\"o}den verstehen - B{\"o}den nutzen - B{\"o}den fit machen, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft, 3. - 9. September 2011}, booktitle = {B{\"o}den verstehen - B{\"o}den nutzen - B{\"o}den fit machen, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft, 3. - 9. September 2011}, language = {de} } @inproceedings{SproeteVesteFischeretal., author = {Spr{\"o}te, Roland and Veste, Maik and Fischer, Thomas and Lange, Philipp and Bens, Oliver and Raab, Thomas and H{\"u}ttl, Reinhard F.}, title = {Development of biologicalsoil crusts in initial ecosystems in Lusatia, Germany}, series = {DBG Jahrestagung 2009 Bonn "B{\"o}den - eine endliche Ressource", 05.-13.09.2009, Bonn}, booktitle = {DBG Jahrestagung 2009 Bonn "B{\"o}den - eine endliche Ressource", 05.-13.09.2009, Bonn}, language = {en} } @misc{SesermanPohleVesteetal., author = {Seserman, Diana-Maria and Pohle, Ina and Veste, Maik and Freese, Dirk}, title = {Growth vulnerability of hybrid-poplar and black locust to prospective climatic changes}, series = {4th World Congress on Agroforestry: Strengthening links between science, society and policy. 20-22 May 2019, Montpellier, France}, journal = {4th World Congress on Agroforestry: Strengthening links between science, society and policy. 20-22 May 2019, Montpellier, France}, pages = {65 -- 65}, abstract = {In Brandenburg, eastern Germany, prospective climate changes imply extreme weather events, increasing annual temperature, and decreasing summer precipitation. Since alley-cropping systems (ACS) have a broad planning horizon, appraising their sustainability and efficiency under changing climate conditions is crucial for forthcoming risk assessments and adaptation scenarios. Consequently, this combined experimental and simulation study investigated the growth vulnerability of poplar clone "Max I" (Populus nigra L. x P. maximowiczii Henry) and black locust (Robinia pseudoacacia L.) short rotation coppices in an ACS established in Brandenburg to a considerable spectrum of weather conditions and long term climate change, from 2015 to the end of 2054. The investigation employed (i) Yield-SAFE, a biophysical, process-based model to simulate the above-ground tree woody biomass and (ii) 100 realisations of the statistical regional climate model STAR 2K. In the most optimistic sequence of events pertaining to air temperature, precipitation, and global radiation, 35\% more woody biomass would be achieved by poplar and 43\% by black locust in the last period compared to the base period. Alternatively, in the most pessimistic circumstances, 54\% less woody biomass would be rendered by poplar and 47\% by black locust. Our findings corroborated the tree growth vulnerability to prospective climatic changes, particularly to changes in water availability.}, language = {en} } @misc{PoradaBaderBerdugoetal., author = {Porada, Philipp and Bader, Maaike Y. and Berdugo, Monica B. and Colesie, Claudia and Ellis, Christopher J. and Giordani, Paolo and Herzschuh, Ulrike and Ma, Yunyao and Launiainen, Samuli and Nascimbene, Juri and Petersen, Imke and Raggio Qu{\´i}lez, Jos{\´e} and Rodr{\´i}guez-Caballero, Emilio and Rousk, Kathrin and Sancho, Leopoldo G. and Scheidegger, Christoph and Seitz, Steffen and Van Stan, John T. and Veste, Maik and Weber, Bettina and Weston, David J.}, title = {A research agenda for non-vascular photoautotrophs under climate change}, series = {New Phytologist}, volume = {237 (2023)}, journal = {New Phytologist}, number = {5}, issn = {0028-646X}, doi = {10.1111/nph.18631}, pages = {1495 -- 1504}, abstract = {Non-vascular photoautotrophs (NVP), including bryophytes, lichens, terrestrial algae, and cyanobacteria, are increasingly recognized as being essential to ecosystem functioning in many regions of the world. Current research suggests that climate change may pose a substantial threat to NVP, but it is highly uncertain to what extent this will affect the associated ecosystem functions and services. Here, we propose a research agenda to address this urgent question, focusing on physiological and ecological processes that link NVP to ecosystem functions while also taking into account the substantial taxonomic diversity across multiple ecosystem types. Accordingly, we developed a new categorization scheme, based on microclimatic gradients, which simplifies the high physiological and morphological diversity of NVP and worldwide distribution with respect to several broad habitat types. We found that habitat-specific ecosystem functions of NVP will likely be substantially affected by climate change, and more quantitative process understanding is required on (1) potential for acclimation (2) response to elevated CO2 (3) role of the microbiome and (4) feedback to (micro)climate. We suggest an integrative approach of innovative, multi-method laboratory and field experiments and eco-physiological modelling, for which sustained scientific collaboration on NVP research will be essential.}, language = {en} } @misc{SchaafBensFischeretal., author = {Schaaf, Wolfgang and Bens, Oliver and Fischer, Anton and Gerke, Horst H. and Gerwin, Werner and Gr{\"u}newald, Uwe and Holl{\"a}nder, Hartmut M. and K{\"o}gel-Knabner, Ingrid and Mutz, Michael and Schloter, Michael and Schulin, Rainer and Veste, Maik and Winter, Susanne and H{\"u}ttl, Reinhard F.}, title = {Patterns and processes of initial terrestrial-ecosystem development}, series = {Journal of Plant Nutrition and Soil Science}, volume = {174}, journal = {Journal of Plant Nutrition and Soil Science}, number = {2}, issn = {1522-2624}, doi = {10.1002/jpln.201000158}, pages = {229 -- 239}, abstract = {Ecosystems are characterized as complex systems with abiotic and biotic processes interacting between the various components that have evolved over long-term periods. Most ecosystem studies so far have been carried out in mature systems. Only limited knowledge exists on the very initial phase of ecosystem development. Concepts on the development of ecosystems are often based on assumptions and extrapolations with respect to structure-process interactions in the initial stage. To characterize the effect of this initial phase on structure and functioning of ecosystems in later stages, it is necessary to disentangle the close interaction of spatial and temporal patterns of ecosystem structural assemblages with processes of ecosystem development. The study of initial, less complex systems could help to better identify and characterize coupled patterns and processes. This paper gives an overview of concepts for the initial development of different ecosystem compartments and identifies open questions and research gaps. The artificial catchment site "Chicken Creek" is introduced as a new research approach to investigate these patterns and processes of initial ecosystem development under defined boundary conditions. This approach allows to integrate the relevant processes with related pattern and structure development over temporal and spatial scales and to derive thresholds and stages in state and functioning of ecosystems at the catchment level.}, language = {en} } @misc{VesteGerwinBiemeltetal., author = {Veste, Maik and Gerwin, Werner and Biemelt, Detlef and Fischer, Annette and Schaaf, Wolfgang}, title = {Monitoring of ecosystem patterns and processes in an artificial catchment in Lusatia, Germany}, series = {6th International Symposium on Ecosystem Behaviour BIOGEOMON 2009}, journal = {6th International Symposium on Ecosystem Behaviour BIOGEOMON 2009}, editor = {Ukonmaanaho, Liisa and Nieminen, Tiina Maileena and Starr, Michael}, publisher = {Finnish Forest Research Institute}, address = {Vantaa, Finland}, isbn = {978-951-40-2177-0}, pages = {S. 84}, language = {en} } @incollection{BiemeltVeste, author = {Biemelt, Detlef and Veste, Maik}, title = {Soil water}, series = {Initial development of the artificial catchment "Chicken Creek" : monitoring program and survey 2005-2008}, booktitle = {Initial development of the artificial catchment "Chicken Creek" : monitoring program and survey 2005-2008}, editor = {Schaaf, Wolfgang and Bliemelt, Detlef and H{\"u}ttl, Reinhard F.}, publisher = {Univ. of Technology, Research Center Landscape Development and Mining Landscapes}, address = {Cottbus}, pages = {57 -- 70}, language = {en} } @misc{FischerVesteBensetal., author = {Fischer, Thomas and Veste, Maik and Bens, Oliver and H{\"u}ttl, Reinhard F.}, title = {Dew formation on the surface of biological soil crusts in central European sand ecosystems}, series = {Biogeosciences discussions}, volume = {9}, journal = {Biogeosciences discussions}, doi = {10.5194/bgd-9-8075-2012}, pages = {8075 -- 8092}, abstract = {Dew formation was investigated in three developmental stages of biological soil crusts (BSC), which were collected along a catena of an inland dune and in the initial substrate. The Penman equation, which was developed for saturated surfaces, was modified for unsaturated surfaces and used for prediction of dewfall rates. The levels of surface saturation required for this approach were predicted using the water retention functions and the thicknesses of the BSCs. During a single event, dewfall increased with crust development from 0.08 kg m-2 for the initial substrate to 0.10, 0.20 and 0.25 kg m-2 for crusts stages 1 to 3, respectively, which was well reflected by the model response. The suggested mechanism of dew formation involves a delay in water saturation in near-surface soil pores and EPS where the crusts were thicker and where the water capacity was high, resulting in elevated vapor flux towards the surface. The results also indicate that the amount of dewfall was too low to observe water flow into deeper soil. Analysis of the soil water retention curves revealed that, despite the sandy mineral matrix, moist crusts with clogged by swollen EPS pores exhibited a clay-like behavior. It is hypothesized that BSCs gain double benefit from suppressing their competitors by runoff generation and from improving their water supply by dew collection. Despite higher amounts of dew, the water availability to the crust community decreases with crust development, which may be compensated by ecophysiological adaptation of crust organisms, and which may further suppress higher vegetation or mosses.}, language = {en} } @inproceedings{HuettlKoegelKnabnerZeyeretal., author = {H{\"u}ttl, Reinhard F. and K{\"o}gel-Knabner, Ingrid and Zeyer, Josef and Munch, Jean Charles and Gr{\"u}newald, Uwe and Pretzsch, Hans and Schaaf, Wolfgang and Gerwin, Werner and Veste, Maik}, title = {Structures and processes of the initial ecosystem development phase in an artificial water catchment}, series = {Plant Life in an Extreme and Changing Environment, Book of Abstracts}, booktitle = {Plant Life in an Extreme and Changing Environment, Book of Abstracts}, pages = {89 -- 90}, language = {en} } @misc{VesteBiemeltFischeretal., author = {Veste, Maik and Biemelt, Detlef and Fischer, Annette and Gerwin, Werner and Schaaf, Wolfgang}, title = {The "Point Zero": Monitoring of biogeochemical patterns and processes in an artificial ecosystem (Lusatia, Germany)}, series = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, journal = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{SchaafGerwinVesteetal., author = {Schaaf, Wolfgang and Gerwin, Werner and Veste, Maik and Biemelt, Detlef}, title = {Monitoring of Soil-Plant-Atmosphere patterns and processes in an artificial catchment}, series = {EGU General Assembly 2008, Wien}, booktitle = {EGU General Assembly 2008, Wien}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{KanzlerBoehmMircketal., author = {Kanzler, Michael and B{\"o}hm, Christian and Mirck, Jaconette and Schmitt, Dieter and Veste, Maik}, title = {Agroforstliche Nutzungsstrategien zur Sicherung der landwirtschaftlichen Produktion im Kontext steigender Urbanisierung und den Folgen des Klimawandels}, series = {Anfoerungen an den Pflanzenbau in einer sich urbanisierenden Welt, 60. Jahrestagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V., 26. bis 28. September 2017, Witzenhausen}, booktitle = {Anfoerungen an den Pflanzenbau in einer sich urbanisierenden Welt, 60. Jahrestagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V., 26. bis 28. September 2017, Witzenhausen}, editor = {Kage, Henning and Sieling, K. and Francke-Weltmann, L.}, publisher = {Liddy Halm}, address = {G{\"o}ttingen}, pages = {54 -- 55}, abstract = {Derzeit lebt mehr als die H{\"a}lfte der Weltbev{\"o}lkerung in St{\"a}dten, Tendenz weiter steigend. Die Sicherstellung der Versorgung dieser Menschen mit Nahrungsmitteln wird k{\"u}nftig den Druck auf die Landwirtschaft in l{\"a}ndlichen Gebieten weiter erh{\"o}hen. Die Nahrungsmittelproduktion wird dabei st{\"a}rker als zuvor durch das Umweltbewusstsein der Verbraucher einerseits und andererseits durch die Verminderung landwirtschaftlicher Produktionsfl{\"a}che zugunsten der Stadtentwicklung beeinflusst werden (Vira et al. 2015). Die Folgen des Klimawandels (u.a. reduzierte Wasserverf{\"u}gbarkeit, h{\"o}heren Verdunstung, Zunahme von Witterungsextremen) werden zu Ertragsschwankungen f{\"u}hren (EEA 2017) und so die Landwirtschaft vor neue Herausforderungen stellen. Dies gilt vor allem f{\"u}r ertragsschw{\"a}chere Standorte mit einem hohen Risiko f{\"u}r klimawandelbedingte Witterungseinfl{\"u}sse. Vor diesem Hintergrund kann die agroforstliche Landnutzung, durch eine h{\"o}here Adaptionsf{\"a}higkeit gegen{\"u}ber der Klimavariabilit{\"a}t (Kanzler et al. 2016) und der M{\"o}glichkeit zur {\"o}kologischen Aufwertung von Ackerfl{\"a}chen, aktiv zu einer stabilen, leistungsf{\"a}higen Landwirtschaft beitragen. Der folgende Beitrag widmet sich Untersuchungsergebnissen aus der Vegetationsperiode 2017 zum Mikroklima auf einem agroforstlich genutzten Ackerstandort in der Lausitz, Brandenburg.}, language = {de} } @misc{VesteFeldeWarrenetal., author = {Veste, Maik and Felde, Vincent John Martin Noah Linus and Warren, Steven D. and Pietrasiak, Nicole}, title = {Editorial: Ecological Development and Functioning of Biological Soil Crusts After Natural and Human Disturbances}, series = {Frontiers in Ecology and Evolution}, volume = {9}, journal = {Frontiers in Ecology and Evolution}, issn = {2296-701X}, doi = {10.3389/fevo.2021.713584}, pages = {4}, abstract = {In recent years, the importance of soil health for ecosystem functions has come further into the scientific focus (Lehmann et al., 2020). Especially after severe ecosystem disturbances, soil formation has to start anew. Such disturbances, which reset ecosystem development to the starting point, can be of natural (volcanoes, mobile sand dunes, floods, glaciers) (La Farge et al., 2013; Lan et al., 2014) or human origin (post-mining landscapes, military training areas, agricultural lands) (Belnap et al., 2007; Schaaf et al., 2011). In these young ecosystems, the interactions between the initial colonizers, the inorganic matter, and the subsequent biogeochemical processes are an important prerequisite for the development of elemental fluxes, soil genesis, and thus for further ecosystem development.}, language = {en} } @misc{FischerGypserSubbotinaetal., author = {Fischer, Thomas and Gypser, Stella and Subbotina, Maria and Veste, Maik}, title = {Synergic hydraulic and nutritional feedback mechanisms control surface patchiness of biological soil crusts on tertiary sands at a post-mining site}, series = {Journal of Hydrology and Hydromechanics}, volume = {62}, journal = {Journal of Hydrology and Hydromechanics}, number = {4}, issn = {0042-790X}, doi = {10.2478/johh-2014-0038}, pages = {293 -- 302}, abstract = {In a recultivation area located in Brandenburg, Germany, five types of biocrusts (initial BSC1, developed BSC2 and BSC3, mosses, lichens) and non-crusted mineral substrate were sampled on tertiary sand deposited in 1985- 1986 to investigate hydrologic interactions between crust patches. Crust biomass was lowest in the non-crusted substrate, increased to the initial BSC1 and peaked in the developed BSC2, BSC3, the lichens and the mosses. Water infiltration was highest on the substrate, and decreased to BSC2, BSC1 and BSC3. Non-metric multidimensional scaling revealed that the lichens and BSC3 were associated with water soluble nutrients and with pyrite weathering products, thus representing a high nutrient low hydraulic feedback mode. The mosses and BSC2 represented a low nutrient high hydraulic feedback mode. These feedback mechanisms were considered as synergic, consisting of run-off generating (low hydraulic) and run-on receiving (high hydraulic) BSC patches. Three scenarios for BSC succession were proposed. (1) Initial BSCs sealed the surface until they reached a successional stage (represented by BSC1) from which the development into either of the feedback modes was triggered, (2) initial heterogeneities of the mineral substrate controlled the development of the feedback mode, and (3) complex interactions between lichens and mosses occurred at later stages of system development.}, language = {en} } @incollection{VesteSchillemBoehm, author = {Veste, Maik and Schillem, Steffi and B{\"o}hm, Christian}, title = {Baumarten f{\"u}r die Agrarholzproduktion}, series = {Agrarholz - Schnellwachsende B{\"a}ume in der Landwirtschaft : Biologie - {\"O}kologie - Management}, booktitle = {Agrarholz - Schnellwachsende B{\"a}ume in der Landwirtschaft : Biologie - {\"O}kologie - Management}, editor = {Veste, Maik and B{\"o}hm, Christian}, publisher = {Springer Spektrum}, address = {Berlin [u.a.]}, isbn = {978-3-662-49930-6}, doi = {10.1007/978-3-662-49931-3_4}, pages = {81 -- 118}, language = {de} } @incollection{BoehmVeste, author = {B{\"o}hm, Christian and Veste, Maik}, title = {Anbau und Nutzung schnellwachsender B{\"a}ume in der Landwirtschaft - ein Ausblick}, series = {Agrarholz - Schnellwachsende B{\"a}ume in der Landwirtschaft : Biologie - {\"O}kologie - Management}, booktitle = {Agrarholz - Schnellwachsende B{\"a}ume in der Landwirtschaft : Biologie - {\"O}kologie - Management}, editor = {Veste, Maik and B{\"o}hm, Christian}, publisher = {Springer Spektrum}, address = {Berlin [u.a.]}, isbn = {978-3-662-49930-6}, doi = {10.1007/978-3-662-49931-3_15}, pages = {511 -- 523}, language = {de} } @inproceedings{KanzlerBoehmMircketal., author = {Kanzler, Michael and B{\"o}hm, Christian and Mirck, Jaconette and Schmitt, Dieter and Veste, Maik}, title = {Agroforstliche Landnutzung als Anpassungsstrategie an den Klimawandel}, series = {Klimawandel und Qualit{\"a}t, Kurzfassungen der Vortr{\"a}ge und Poster, 59. Jahrestagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V., 27. bis 29. September 2016, Gießen}, booktitle = {Klimawandel und Qualit{\"a}t, Kurzfassungen der Vortr{\"a}ge und Poster, 59. Jahrestagung der Gesellschaft f{\"u}r Pflanzenbauwissenschaften e.V., 27. bis 29. September 2016, Gießen}, editor = {Kage, Henning and Sieling, K. and Francke-Weltmann, L.}, publisher = {Verlag Liddy Halm}, address = {G{\"o}ttingen}, pages = {126 -- 127}, abstract = {Der parallele Anbau von Ackerfr{\"u}chten und Agrarholz in Agroforstsystemen f{\"u}hrt zu einer {\"o}kologischen Aufwertung der landwirtschaftlichen Nutzfl{\"a}che und hat auch positive Auswirkungen auf das Mikroklima zwischen den Geh{\"o}lzstreifen. Bei streifenf{\"o}rmigen Agroforstsystemen (Alley Cropping) in Brandenburg konnte eine deutliche Reduktion der Windgeschwindigkeit und von Temperaturextremen sowie ein Anstieg der relativen Luftfeuchtigkeit beobachtet werden (B{\"o}hm et al. 2014, Kanzler et al. 2015). Eine Reduzierung der Windgeschwindigkeit f{\"u}hrt zudem zu einer Minderung der potentiellen Evaporation. Dabei stellt sich die Frage, wie sich diese Ver{\"a}nderungen kleinr{\"a}umig auf die gemessene Evaporation und auf die Produktivit{\"a}t der Ackerkulturen auswirken.}, language = {de} } @misc{HasharNasrinFreeseetal., author = {Hashar, Mohammad Rafiul and Nasrin, Shamima and Freese, Dirk and Veste, Maik}, title = {Study of phosphorus status and sorption properties in reclaimed lignite mine soils under different age stands of Robinia pseudoacacia L. in Welzow, Germany}, series = {Land Degradation \& Development}, journal = {Land Degradation \& Development}, publisher = {Wiley}, issn = {1085-3278}, doi = {10.1002/ldr.5214}, pages = {12}, abstract = {AbstractDue to the open-cast mining activities, a large area in the Lusatian region in eastern Germany was left unproductive. Robinia pseudoacacia L. was planted within different ages in that large area as a short rotation coppice for woody biomass cultivation as well as to increase soil nutrients by increasing plant phosphorous (P) availability, accumulating organic matter input and biological nitrogen fixation. In this experiment, soil chemical analysis has been done to investigate the improvement and status of P in the mining soil depending on the ages of plantation (16, 17, 18, and 27 years old) of Robinia pseudoacacia L. The results show a higher P sorption in the oldest site, and the average P sorption capacity (PSC) obtained in the oldest site was 21.0 mmol Kg-1, which was 3-4 times higher than the youngest site. However, all the values were very low compared with the optimum plant growth level, and low P desorption indicates a low level of plant-available P in the soil. The lower sorption properties with the small amount of oxalate iron (Feox) and oxalate aluminum (Alox) indicate the general P deficiency in the soil. However, a comparison from a previous study on the same experimental areas shows that not much improvement has occurred in soil P, and the change in soil P dynamics is very low. Nevertheless, the improvement of the values with increasing ages of Robinia pseudoacacia L. indicates that further improvement may be expected in soil nutrients with time.}, language = {en} } @misc{MaWeberKratzetal., author = {Ma, Yunyao and Weber, Bettina and Kratz, Alexandra and Raggio, Jos{\´e} and Colesie, Claudia and Veste, Maik and Bader, Maaike Y. and Porada, Philipp}, title = {Exploring environmental and physiological drivers of the annual carbon budget of biocrusts from various climatic zones with a mechanistic data-driven model}, series = {Biogeosciences}, volume = {20}, journal = {Biogeosciences}, number = {13}, issn = {1726-4189}, doi = {10.5194/bg-20-2553-2023}, pages = {2553 -- 2572}, abstract = {Biocrusts are a worldwide phenomenon, contributing substantially to ecosystem functioning. Their growth and survival depend on multiple environmental factors, including climatic ones, and the relations of these factors to physiological processes. Responses of biocrusts to individual environmental factors have been examined in a large number of field and laboratory experiments. These observational data, however, have rarely been assembled into a comprehensive, consistent framework that allows quantitative exploration of the roles of multiple environmental factors and physiological properties for the performance of biocrusts, in particular across climatic regions. Here we used a data-driven mechanistic modelling framework to simulate the carbon balance of biocrusts, a key measure of their growth and survival. We thereby assessed the relative importance of physiological and environmental factors for the carbon balance at six study sites that differ in climatic conditions. Moreover, we examined the role of seasonal acclimation of physiological properties using our framework, since the effects of this process on the carbon balance of biocrusts are poorly constrained so far. We found substantial effects of air temperature, CO2 concentration, and physiological parameters that are related to respiration on biocrust carbon balance, which differ, however, in their patterns across regions. The ambient CO2 concentration is the most important factor for biocrusts from drylands, while air temperature has the strongest impact at alpine and temperate sites. Metabolic respiration cost plays a more important role than optimum temperature for gross photosynthesis at the alpine site; this is not the case, however, in drylands and temperate regions. Moreover, we estimated a small annual carbon gain of 1.5  by lichen-dominated biocrust and 1.9  by moss-dominated biocrust at a dryland site, while the biocrusts lost a large amount of carbon at some of the temperate sites (e.g. -92.1 for lichen-dominated and -74.7  for moss-dominated biocrust). These strongly negative values contradict the observed survival of the organisms at the sites and may be caused by the uncertainty in environmental conditions and physiological parameters, which we assessed in a sensitivity analysis. Another potential explanation for this result may be the lack of acclimation in the modelling approach, since the carbon balance can increase substantially when testing for seasonally varying parameters in the sensitivity analysis. We conclude that the uncertainties in air temperature, CO2 concentration, respiration-related physiological parameters, and the absence of seasonal acclimation in the model for humid temperate and alpine regions may be a relevant source of error and should be taken into account in future approaches that aim at estimating the long-term biocrust carbon balance based on ecophysiological data.}, language = {en} } @misc{FischerKholiavkoSchaafetal., author = {Fischer, Thomas and Kholiavko, Tatiana and Schaaf, Wolfgang and Veste, Maik}, title = {Soil respiration responses of moss and lichen biocoenoses to moderate and severe rain events after summer drought in a temperate early-successional ecosystem}, series = {Ecohydrology}, volume = {16}, journal = {Ecohydrology}, number = {7}, issn = {1936-0592}, doi = {10.1002/eco.2578}, abstract = {It is commonly accepted that CO2 efflux increases with soil water content in aerated soils and that rewetting after periods of soil drying can result in respiration pulses. It has further been shown that soil pores may become water logged which can impede soil gas exchange. The present study aimed to quantify the carbon response of moss (Polytrichum piliferum) and lichen (Cladonia coniocraea) biocoenoses to different quantities of rain in an artificial catchment, which granted that the starting point of the development of both biocoenoses was the same. To address this aim, we conducted in situ soil moisture and soil respiration measurements, where soil respiration was hypothesised to emerge from a cryptogamic vegetation layer and from mineral soil beneath. We found that higher water-holding capacity of the moss layer and higher accumulation of organic matter in the upper mineral soil under mosses result in higher amounts of water stored near the surface. As a consequence, evaporation of water as well as pulses of CO2 efflux after moderate rain following a period of drought were higher in the moss biocoenosis, where the upper mineral soil was of key importance. In contrast, the lichen biocoenosis facilitated penetration of rainwater into the deep soil. Superimposing rewetting pulses, near-saturation of soil pores with water after severe rain resulted in gas exchange inhibition and diminished soil respiration until subsequent aeration in both biocoenoses}, language = {en} } @misc{MantovaniVesteBoldtBurischetal., author = {Mantovani, Dario and Veste, Maik and Boldt-Burisch, Katja and Fritsch, Simone and Koning, Laurie Anne and Freese, Dirk}, title = {Carbon allocation, nodulation, and biological nitrogen fixation of black locust (Robinia pseudoacacia L.) under soil water limitation}, series = {Annals of Forest Research}, volume = {58}, journal = {Annals of Forest Research}, number = {2}, issn = {2065-2445}, doi = {10.15287/afr.2015.420}, pages = {259 -- 274}, abstract = {The pioneer tree black locust (Robinia pseudoacacia L.) is a drought-resistant tree and, in symbiosis with Rhizobium, able to fix dinitrogen from the atmosphere. It is, therefore, an interesting species for marginal lands where soil amelioration is sought in addition to economic gain. However, the interaction between soil water availability, carbon allocation and nitrogen fixation is important for a successful establishment of trees on marginal lands and has not yet been investigated for black locust. Twoyear-old trees were grown under various soil water conditions and drought cycles. The stable isotopic composition of C (δ 13C) and N (δ 15N) of the leaves was used to identify i) the effective drought condition of the treatments and ii) the portion N accrued from the atmosphere by the biological nitrogen fixation. Drought-stressed plants significantly reduced their total aboveground biomass production, which was linearly linked to tree transpiration. The shoot:root ratio values changed from 2.2 for the drought-stressed to 4.3 for the well-watered plants. Our investigation shows that drought stress increases the nodule biomass of black locust in order to maintain biological nitrogen fixation and to counteract the lower soil nitrogen availability. The biological nitrogen fixation of drought-stressed trees could be maintained at relatively higher values compared to the well-watered trees. The average leaf nitrogen content varied between 2.8\% and 3.0\% and was not influenced by the drought stress. Carbon fixation, carbon allocation, and biological nitrogen fixation are to some extent balanced at low irrigation and allow Robinia to cope with long-term water constraints. The combination of black locust's ecophysiological and morphological plasticity make it interesting as a biomass source for bioenergy and timber production, even in nutrient-limited and drought-affected areas of Europe.}, language = {en} } @misc{MantovaniVesteGypseretal., author = {Mantovani, Dario and Veste, Maik and Gypser, Stella and Halke, Christian and Koning, Laurie Anne and Freese, Dirk and Lebzien, Stefan}, title = {Transpiration and biomass production of the bioenergy crop Giant Knotweed Igniscum under various supplies of water and nutrients}, series = {Journal of Hydrology and Hydromechanics}, volume = {62}, journal = {Journal of Hydrology and Hydromechanics}, number = {4}, issn = {0042-790X}, doi = {10.2478/johh-2014-0028}, pages = {316 -- 323}, abstract = {Soil water availability, nutrient supply and climatic conditions are key factors for plant production. For a sustainable integration of bioenergy plants into agricultural systems, detailed studies on their water uses and growth performances are needed. The new bioenergy plant Igniscum Candy is a cultivar of the Sakhalin Knotweed (Fallopia sachalinensis), which is characterized by a high annual biomass production. For the determination of transpiration-yield relations at the whole plant level we used wicked lysimeters at multiple irrigation levels associated with the soil water availability (25, 35, 70, 100\%) and nitrogen fertilization (0, 50, 100, 150 kg N ha-1). Leaf transpiration and net photosynthesis were determined with a portable minicuvette system. The maximum mean transpiration rate was 10.6 mmol m-2 s-1 for well-watered plants, while the mean net photosynthesis was 9.1 μmol m-2 s-1. The cumulative transpiration of the plants during the growing seasons varied between 49 l (drought stressed) and 141 l (well-watered) per plant. The calculated transpiration coefficient for Fallopia over all of the treatments applied was 485.6 l kg-1. The transpiration-yield relation of Igniscum is comparable to rye and barley. Its growth performance making Fallopia a potentially good second generation bioenergy crop.}, language = {en} } @misc{KoningVesteFreeseetal., author = {Koning, Laurie Anne and Veste, Maik and Freese, Dirk and Lebzien, Stefan}, title = {Effects of nitrogen and phsphate fertilization on leaf nutrient content, photosythesis, and growth of the novel bioenergy crop Fallopia schalinensis vc. 'Igniscum Candy'}, series = {Journal of Applied Botany and Food Quality}, volume = {88}, journal = {Journal of Applied Botany and Food Quality}, issn = {1439-040X}, doi = {10.5073/JABFQ.2015.088.005}, pages = {22 -- 28}, abstract = {The aim of the study was to determine the effects of nitrogen and phosphate fertilization on the growth performance of the novel bioenergy crop Fallopia sachalinensis cv. 'Igniscum Candy' (Polygonaceae). In a controlled pot experiment various nitrogen (0, 50, 150, 300 kg N ha-1) and phosphate (20, 40, 80 kg P ha-1) fertilizer amounts were applied to measure the effect on the biomass, plant height, leaf area, and leaf nutrient (N and P) content. Furthermore, the ecophysiological processes of chlorophyll content, chlorophyll fluorescence, and gas exchange were measured. The application of nitrogen correlated positively with biomass production, while phosphate fertilization did not show a significant effect on plant growth or ecophysiological parameters. The leaf nitrogen contents were significantly correlated with the nitrogen applications, while the leaf phosphate contents did not show a correlation with the P fertilizations, but increased with the leaf nitrogen contents. A significant linear correlation between N-Tester chlorophyll meter values and chlorophyll contents as well as with leaf nitrogen contents could be determined. Under the influence of the nitrogen fertilization, net photosynthesis increased from 3.7 to 6.6 μmol m-2 s-1. The results of this experiment demonstrated that nitrogen fertilization has an overall positive correlation with leaf nitrogen content, photosynthesis, and growth of the bioenergy crop Fallopia sachalinensis var. Igniscum Candy.}, language = {en} } @misc{VesteTodtBreckle, author = {Veste, Maik and Todt, Henning and Breckle, Siegmar-W.}, title = {Influence of halophytic hosts on their parasites - the case of Plicosepalus acaciae}, series = {AOB Plants}, volume = {7}, journal = {AOB Plants}, issn = {2041-2851}, doi = {10.1093/aobpla/plu084}, pages = {plu084}, abstract = {Halophytes develop various morphological and physiological traits that enable them to grow successfully on saline substrates. Parasitic plants on halophytic hosts may also encounter salt stress. We investigated the mistletoe Plicosepalus acaciae (syn: Loranthus acacia; Loranthaceae), which occurs on 5 halophytic and at least 10 non-halophytic hosts in the Southern Arava Valley (Israel). Plicosepalus acaciae is a common parasite north of Eilat to the Dead Sea area and in the Jordan Valley. Morphological and physiological responses of P. acaciae to salinity were investigated by comparison of plants on halophytic with those on non-halophytic hosts. Ion patterns of different host-parasite associations were determined as was the development of leaf succulence at different growth stages. The leaf water content of P. acaciae increased and leaves developed succulence when growing on halophytic hosts, especially on Tamarix species, where leaf water content was three times higher than that on non-halophytic hosts and the leaf volume increased four to five times. The reason for increased succulence was a higher ion concentration of, and osmotic adjustment with, Na+ and Cl2. Plicosepalus acaciae showed a high morphological and ecophysiological plasticity, enabling it to cope with salt stress, and can be classified as a facultative eu-halophyte, which increases its halo-succulence according to the host. Host-parasite associations are a model systemfor the investigation of halophytes under different salt stress conditions.}, language = {en} } @misc{MantovaniVesteBoehmetal., author = {Mantovani, Dario and Veste, Maik and B{\"o}hm, Christian and Vignudelli, Marco and Freese, Dirk}, title = {Spatial and temporal variation of drought impact on black locust (Robinia pseudoacacia L.) water status and growth}, series = {iForest Biogeosciences and Forestry}, volume = {8}, journal = {iForest Biogeosciences and Forestry}, issn = {1971-7458}, doi = {10.3832/ifor1299-008}, pages = {743 -- 747}, abstract = {Stimulated by the rising demand for bioenergy, forestry practices for energy production are of increasing importance worldwide. Black locust (Robinia pseudoacacia L.) is a suitable tree species for biomass production in shortrotation plantations in East Germany, especially on marginal land where insufficient water and nutrients are a limiting factor for tree growth. Our study aims to clarify the spatial and temporal variability of the black locust growth through the analysis of the plant water status, and to evaluate the effect of adverse edaphic conditions on growth performances, amplified by periods of summer drought. The study was carried out at two sites presenting comparable climatic but different edaphic conditions: (i) fertile agricultural soil; and (ii) heterogeneous unstructured soil from a reclaimed post-mining area. During the vegetation period, the growth rate decreased in both sites following the plant water status in terms of pre-dawn leaf water potential. Particularly in the post-mining area, due to the adverse edaphic conditions, below the critical pre-dawn water potential value of -0.5 MPa, the stem growth was drastically reduced during a period of summer drought. However, the trees could cope with the extreme soil and weather conditions in the post-mining site without perishing.}, language = {en} } @misc{GypserHerppichFischeretal., author = {Gypser, Stella and Herppich, Werner B. and Fischer, Thomas and Lange, Philipp and Veste, Maik}, title = {Photosynthetic characteristics and their spatial variance on biological soil crusts covering initial soils of post-mining sites in Lower Lusatia, NE Germany}, series = {Flora}, volume = {Vol. 220}, journal = {Flora}, issn = {0367-2530}, doi = {10.1016/j.flora.2016.02.012}, pages = {103 -- 116}, abstract = {Following surface disturbance, quaternary sands are the basic substrate for soil development in the Lusatian reclamation area. These substrates mostly contain few organic matter and, hence, are nutrient poor. Accumulation of soil carbon is an important factor for ecosystem development, where biological soil crusts initially influence soil processes and promote ecosystem succession. The compositional structures of biological soil crusts at various developmental stages and their photosynthetic properties were investigated on two former open-cast lignite sites, currently under reclamation, an artificial sand dune in Welzow S{\"u}d, and a forest plantation in Schlabendorf S{\"u}d (Brandenburg, Germany). As development of biological soil crusts progressed, their contents of organic carbon and total chlorophyll increased. The ratio of these parameters, however, varied with the relative contribution of lichens and mosses in particular. Also maximum photochemical efficiency, net photosynthesis and respiration increased with crustal development. An additional evaluation of NDVI and chlorophyll fluorescence images showed that especially moss-dominated biocrusts had higher photosynthetic capacity compared to green algae-dominated biocrusts or soil lichens, so the photosynthetic capacity showed to be highly species-specific. The ratio of gross photosynthesis to respiration indicated a higher ecological efficiency of biocrusts dominated by green algae than of lichen-dominated biocrusts. The occurrence of soil lichens reduced net CO2 fixation and increased CO2 release due to the enhanced mycobiontic respiration. During crustal succession, the rise of photosynthesis-related parameters is not necessarily linear as a result of the highly heterogenic distribution of the different crustal organisms between biocrusts of similar developmental stages as well as between those growing at the two study sites. Therefore, the evaluation of relevant ecophysiological parameters highlighted that not all biocrust-forming organisms similarly contribute to the ecophysiological behavior of biological soil crusts. Nevertheless, the occurrence of the biological soil crusts promoted soil formation and accumulation of soil carbon in initial soils.}, language = {en} } @misc{GypserVesteFischeretal., author = {Gypser, Stella and Veste, Maik and Fischer, Thomas and Lange, Philipp}, title = {Infiltration and water retention of biological soil crusts on reclaimed soils of former open-cast lignite mining sites in Brandenburg, north-east Germany}, series = {Journal of hydrology and hydromechanics}, volume = {64}, journal = {Journal of hydrology and hydromechanics}, number = {1}, doi = {10.1515/johh-2016-0009}, pages = {1 -- 11}, abstract = {Investigations were done on two former open-cast lignite mining sites under reclamation, an artificial sand dune in Welzow S{\"u}d, and a forest plantation in Schlabendorf S{\"u}d (Brandenburg, Germany). The aim was to associate the topsoil hydrological characteristics of green algae dominated as well as moss and soil lichen dominated biological soil crusts during crustal succession with their water retention and the repellency index on sandy soils under temperate cli-mate and different reliefs. The investigation of the repellency index showed on the one hand an increase due to the cross-linking of sand parti-cles by green algae which resulted in clogging of pores. On the other hand, the occurrence of moss plants led to a de-crease of the repellency index due to absorption caused by bryophytes. The determination of the water retention curves showed an increase of the water holding capacity, especially in conjunction with the growth of green algae layer. The pore-related van Genuchten parameter indicate a clay-like behaviour of the developed soil crusts. Because of the inho-mogeneous distribution of lichens and mosses as well as the varying thickness of green algae layers, the water retention differed between the study sites and between samples of similar developmental stages. However, similar tendencies of water retention and water repellency related to the soil crust formation were observed. Biological soil crusts should be considered after disturbances in the context of reclamation measures, because the ini-tial development of green algae biocrusts lead to an increasing repellency index, while the occurrence of mosses and a gain in organic matter enhance the water holding capacity. Thus, the succession of biocrusts and their small-scale succes-sion promote the development of soil and ecosystem.}, language = {en} } @misc{LiGaoWangetal., author = {Li, Bai and Gao, Jiarong and Wang, Xiuru and Ma, Lan and Cui, Qiang and Veste, Maik}, title = {Effects of biological soil crusts on water infiltration and evaporation Yanchi Ningxia, Maowusu Desert, China}, series = {International Journal of Sediment Research}, volume = {31}, journal = {International Journal of Sediment Research}, number = {4}, issn = {1001-6279}, doi = {10.1016/j.ijsrc.2016.05.005}, pages = {311 -- 323}, abstract = {Biological soil crusts serve as a vanguard for improving the ecological environment in arid, semi-arid desertification areas.It is a good indicator of the level of improvement which the local ecological evironment is undertaking. In desert areas, water condition is a key factor of improving the ecological environment. As a first layer protection, biological crusts play an important role in local vegetation succession due to their abilities to conserve and maintain moisture. Using Maowusu desert in Yanchi of Ningxia province as an example, after three years of research, this paper chooses three kinds of biological crusts including lichen, moss and cyanobacterial which are under the cover of Artemisia ordosicaas research objects. The results of this study indicate that, the closer biological crusts are to Artemisia ordosica vegetation, the thicker they become. In the same position of Artemisia ordosica vegetation, the thickness of moss crusts is the highest, followed by lichen crusts, and the thickness of cyanobacterial crusts is the lowest. Biological soil crusts coverage protects the natural water content of soil layers from 0 to 5cm. Also, it effects falling water to infiltrate deeper, and cannot prevent the surfacewater content from evaporating effectively. The effect of biological crusts blocking water infiltration decreases with the increase of rainfall. At the same rainfall level, moss crusts provide the strongest water infiltration blockage, followed by lichen crusts and cyanobacterial crusts. With the increase of rainfall, the depth of water infiltration increases.At the same rainfall level, the relationship of water infiltration depth is as follows: cyanobacterial crusts > lichen crusts > moss crusts. With the increase of biological crusts thickness, they blocking water infiltration capacity is stronger, and the depth of water infiltration is smaller. Analysis on the characteristic of simulated rainfall process on biological crusts shows that sandy land can be fixed by applying appropriate artificial biological crusts to build a sustainable forest protection system and to create a stable ecosystem in desertification area.}, language = {en} } @misc{XiaoVeste, author = {Xiao, Bo and Veste, Maik}, title = {Moss-dominated biocrusts increase soil microbial abundance and community diversity and improve soil fertility in semi-arid climates on the Loess Plateau of China}, series = {Applied Soil Ecology}, volume = {117-118}, journal = {Applied Soil Ecology}, doi = {10.1016/j.apsoil.2017.05.005}, pages = {165 -- 177}, abstract = {Various ecological functions of biocrusts are mostly determined by their bacterial and fungal abundance and community diversity, which has not yet been fully investigated. To provide more insights into this issue, we collected samples of moss biocrusts, fixed sand, and mobile sand from a watershed with semi-arid climate on the Loess Plateau of China. The relative abundances and community diversities of soil bacteria and fungi of the samples were determined using high-throughput DNA sequencing. Finally, we analyzed the characteristics of bacterial and fungal community of the moss biocrusts and their relationships to the content of soil nutrients. Our results showed that the moss biocrusts had 1048 bacterial OTUs (operational taxonomic units) and 58 fungal OTUs, and their Shannon diversity indexes were 5.56 and 1.65, respectively. The bacterial community of the moss biocrusts was dominated by Acidobacteria (24.3\%), Proteobacteria (23.8\%), Chloroflexi (15.8\%), and Actinobacteria (14.5\%), and their fungal community was dominated by Ascomycota (68.0\%) and Basidiomycota (23.8\%). The moss biocrusts had far more bacterial OTUs (≥56.9\%) but similar number of fungal OTUs as compared with the uncrusted soil, and their Sorenson's similarity coefficients of bacterial and fungal communities were less than 0.768 and 0.596, respectively. Moreover, the contents of soil nutrients (C, N, P) were significantly correlated with the OTU numbers of bacteria and the relative abundances of bacteria and fungi. Our results indicated that moss biocrusts harbor a large number and high diversity of bacteria and fungi, and these diversified bacteria and fungi play important roles in ecosystem functioning through improving soil fertility.}, language = {en} } @misc{MantovaniVesteFreese, author = {Mantovani, Dario and Veste, Maik and Freese, Dirk}, title = {Effects of Drought Frequency on Growth Performance and Transpiration of Young Black Locust (Robinia pseudoacacia L.)}, series = {International Journal of Forestry Research}, journal = {International Journal of Forestry Research}, issn = {1687-9376}, doi = {10.1155/2014/821891}, pages = {11}, abstract = {Black locust (Robinia pseudoacacia L.) is a drought-tolerant fast growing tree, which could be an alternative to the more common tree species used in short-rotation coppice on marginal land. The plasticity of black locust in the form of ecophysiological and morphological adaptations to drought is an important precondition for its successful growth in such areas. However, adaptation to drought stress is detrimental to primary production. Furthermore, the soil water availability condition of the initial stage of development may have an impact on the tree resilience. We aimed to investigate the effect of drought stress applied during the resprouting on the drought tolerance of the plant, by examining the black locust growth patterns. We exposed young trees in lysimeters to different cycles of drought. The drought memory affected the plant growth performance and its drought tolerance: the plants resprouting under drought conditions were more drought tolerant than the well-watered ones. Black locust tolerates drastic soil water availability variations without altering its water use efficiency (2.57 g L-1), evaluated under drought stress. Due to its constant water use efficiency and the high phenotypic plasticity, black locust could become an important species to be cultivated on marginal land.}, language = {en} } @misc{KueppersSchmittLineretal., author = {K{\"u}ppers, Manfred and Schmitt, Dieter and Liner, Susanne and B{\"o}hm, Christian and Kanzler, Michael and Veste, Maik}, title = {Photosynthetic characteristics and simulation of annual leaf carbon gains of hybrid poplar (Populus nigra L. x P. maximowiczii Henry) and black locust (Robinia pseudoacacia L.) in a temperate agroforestry system}, series = {Agroforestry Systems}, volume = {92}, journal = {Agroforestry Systems}, number = {5}, issn = {0167-4366}, doi = {10.1007/s10457-017-0071-z}, pages = {1267 -- 1286}, abstract = {A leaf net photosynthesis model is presented driven by light and modulated by temperature and air humidity. From this the seasonal variation of CO2 uptake and release could be modelled to estimate the annual carbon fluxes of sun and shade leaves. In fully expanded leaves light is the major factor determining daily carbon balances, and highest observed daily carbon gains in sun leaves amounted to 748.9 mmol CO2 m-2 day-1 in poplar and to 536.3 mmol CO2 m-2 day-1 in black locust, while the annual carbon gains amounted to 46,824 mol CO2 m-2 in black locust and 66,803 mol CO2 m-2 in hybrid poplar. Results obtained via gas exchange measurements and from the leaf model clearly indicate a potentially better growth performance of the poplar compared to black locust on the investigated site. The presented photosynthesis model provides a good and realistic estimation for seasonal carbon balances on the leaf level for both species.}, language = {en} } @misc{GypserVesteFischeretal., author = {Gypser, Stella and Veste, Maik and Fischer, Thomas and Lange, Philipp}, title = {Formation of soil lichen crusts at reclaimed post-mining sites, Lower Lusatia, North-east Germany}, series = {Graphis Scripta}, volume = {27}, journal = {Graphis Scripta}, number = {1-2}, issn = {0901-7593}, pages = {3 -- 14}, abstract = {Biological soil crusts were investigated at reclaimed post-mining sites near Welzow and Schlabendorf in Lower Lusatia (Brandenburg, Germany). Various development stages from initial biological soil crusts built up by green algae, to more developed soil crusts with mosses, as well as moss-soil lichen crusts, were classified. The spatial-temporal dynamics during the development resulted in a moss-lichens cover with discrete patches of pioneer organisms like green algae in between. At the study sites, 13 species of terricolous lichens were identified. The formation of the biological soil crust is important for the accumulation of soil organic matter in the first millimeters of the topsoil of these pioneer ecosystems. A correlation between cryptogamic biomass and soil carbon content were found.}, language = {en} } @misc{MantovaniVesteFreese, author = {Mantovani, Dario and Veste, Maik and Freese, Dirk}, title = {Black locust (Robina pseudoacacia L.) ecopysiological and morphological adaptations to drought and their consequence on biomass production and water-use efficiency}, series = {New Zealand Journal of Forestry Science}, volume = {44}, journal = {New Zealand Journal of Forestry Science}, number = {1}, doi = {10.1186/s40490-014-0029-0}, pages = {11}, abstract = {Background: Successful plantation efforts growing Robinia pseudoacacia L. (black locust) in the drier regions of Hungary and East Germany (Brandenburg), have demonstrated the potential of black locust as an alternative tree species for short-rotation biomass energy plantations. Methods: The response of black locust to water limitation was investigated in a lysimeter experiment. Plants were grown under three different soil moisture regimes, with values set at 35\%, 70\%, and 100\% of the soil water availability, namely WA35, WA70, and WA100. Their morphological adaptation and productivity response to water constraint were assessed together with their water-use efficiency. Furthermore, the ecophysiological adaptation at the leaf level was assessed in terms of net photosynthesis and leaf transpiration. Results: During the growing season, plants in the WA35, WA70, and WA100 treatments transpired 239, 386, and 589 litres of water respectively. The plants subjected to the WA35 and WA70 treatments developed smaller leaves compared with the plants subjected to the WA100 treatment (66\% and 36\% respectively), which contributed to the total leaf area reduction from 8.03 m2 (WA100) to 3.25 m2 (WA35). The total above-ground biomass produced in the WA35 (646 g) and WA70 (675 g) treatments reached only 46\% and 48\% of the biomass yield obtained in the WA100 (1415 g). The water-use efficiency across all treatments was 2.31 g L-1. At vapour pressure deficit (VPD) values <1.4 kPa trees growing under the WA35 soil moisture regime showed a stomatal down-regulation of transpiration to 5.3 mmol m-2 s-1, whereas the trees growing under the WA100 regime did not regulate their stomatal conductance and transpiration was 11.7 mmol m-2 s-1, even at VPD values >2 kPa. Conclusions: Black locust plants can adapt to prolonged drought conditions by reducing water loss through both reduced transpiration and leaf size. However, under well-watered conditions it does not regulate its transpiration, and therefore it cannot be considered a water-saving tree species.}, language = {en} } @misc{HowellTuckerGroteetal., author = {Howell, Armin and Tucker, Colin and Grote, Ed and Veste, Maik and Belnap, Jayne and Kast, Gerhard and Weber, Bettina and Reed, Sasha C.}, title = {Manufacturing Simple and Inexpensive Soil Surface Temperature and Gravimetric Water Content Sensors}, series = {Journal of Visualized Experiments}, volume = {154}, journal = {Journal of Visualized Experiments}, issn = {1940-087X}, doi = {10.3791/60308}, pages = {13}, abstract = {Quantifying temperature and moisture at the soil surface is essential for understanding how soil surface biota responds to changes in its environment. However, at the soil surface these variables are highly dynamic and standard sensors do not explicitly measure temperature or moisture in the upper few millimeters of the soil profile. This manuscript describes methods for manufacturing simple, inexpensive sensors that simultaneously measure the temperature and moisture of the upper 5 mm of the soil surface. In addition to sensor construction, steps for quality control, as well as for calibration for various substrates, are explained. The sensors incorporate a Type E thermocouple to measure temperature and assess soil moisture by measuring the resistance between two gold-plated metal probes at the end of the sensor at a depth of 5 mm. The methods presented here can be altered to customize probes for different depths or substrates. These sensors have been effective in a variety of environments and have endured months of heavy rains in tropical forests as well as intense solar radiation in deserts of the southwestern U.S. Results demonstrate the effectiveness of these sensors for evaluating warming, drying, and freezing of the soil surface in a global change experiment.}, language = {en} } @misc{KueppersKueppersHornaetal., author = {K{\"u}ppers, Manfred and K{\"u}ppers, Barbara I. L. and Horna, Viviana and Veste, Maik and Zimmermann, Reiner and Lauerer, Marianne and Aas, Gregor}, title = {Green barks of trees from drought deciduous forests ("bosque seco") in northern Peru/southern Ecuador do not perform CAM}, series = {Basic and Applied Dryland research}, journal = {Basic and Applied Dryland research}, issn = {1864-3191}, doi = {10.1127/badr/2015/0002}, pages = {15}, abstract = {Trees from drought deciduous forests ("bosque seco") in northern Peru and southern Ecuador regularly shed their leaves at the onset of seven months-long periods without rain. This way they very effectively reduce the bulk water consumption by leaf transpiration, still loosing small amounts of water through their bark, but at the risk of too little or no carbon gain when leaf-less. Seven species studied here have good developed green cortex tissue on stems and axes, as especially evident for the "bottle tree" Ceiba trischistandra (A. Gray) Bakhuisen (Bombacaceae). In several leaf-less tree species at the end of summer drought, when xylem sap flows are very low, indications of higher xylem flows at night as compared to day-time were found, which led to the question of whether the trees are capable of performing CAM in their axes. However, although quite low in some cases, the pH of the cortex tissues did not fluctuate diurnally. In addition, no night-time carbon uptake could be observed. Although no net carbon gain was measured in C. trischistandra and Erythrina smithiana Krukoff (Fabaceae) photosynthetic activity of the green cortex was sufficient to re-assimilate between 50\% to 60\% of the carbon released by mitochondrial respiration. In contrast, the obligate CAM plant Cereus diffusus (Britton \& Rose) Werdermann (Cactaceae), which was studied as a reference in the same environment, showed both diurnal pH-fluctuations in its green tissue with lowest values before sun rise, and net carbon fixation at night.}, language = {en} } @misc{XiaoHuVesteetal., author = {Xiao, Bo and Hu, Kelin and Veste, Maik and Kidron, Giora J.}, title = {Natural recovery rates of moss biocrusts after severe disturbance in a semiarid climate of the Chinese Loess Plateau}, series = {Geoderma}, volume = {337}, journal = {Geoderma}, issn = {0016-7061}, doi = {10.1016/j.geoderma.2018.09.054}, pages = {402 -- 412}, abstract = {Biocrusts are vulnerable to large scale disturbances including trampling activities, and their recovery rates are highly variable with estimates fluctuating by more than one order of magnitude, from<5 years (very fast) to>250 years (very slow). Also, the development of microbial abundance and community diversity of biocrusts after disturbances is poorly understood. In a semiarid climate of the Chinese Loess Plateau, we conducted a recovery experiment on well-developed moss biocrusts after a severe disturbance, during which the entire upper 3 cm of the surface was removed. In the following nine years, the general characteristics and microbial community of the recovering and undisturbed biocrusts as well as a substrate with no crust (bare sand) were periodically determined. Through linear or logistic extrapolation of the observed recovery rates, the recovery time of the biocrusts after disturbance was estimated by both biocrust characteristics and microbial community. Recovery time yielded the following estimates: a) coverage within 3 years, b) thickness within 8 years, c) biomass within 9-13 years, and d) cultivable microbial density within 11-13 years. More importantly, the recovery time of the disturbed moss-biocrusts estimated by the number of bacteria and fungi was ~10 and 20 years, respectively, and that estimated by the bacterial and fungal community diversity was 12-14 and 12-16 years, respectively. In conclusion, moss biocrusts would take 15-20 years to achieve full recovery, which was shorter than many previously published estimates that regarded biocrusts and especially moss-dominated biocrusts to have a long recovery time of hundreds of years. However, it should be also kept in mind that very fast recovery (< 5 years) of biocrusts was less reliable because such estimations are mostly based on visual cover only rather than on the multi-variables of the recovering biocrusts.}, language = {en} } @misc{KanzlerBoehmMircketal., author = {Kanzler, Michael and B{\"o}hm, Christian and Mirck, Jaconette and Schmitt, Dieter and Veste, Maik}, title = {Microclimate effects on evaporation and winter wheat (Triticum aestivum L.) yield within a temperate agroforestry system}, series = {Agroforestry Systems}, journal = {Agroforestry Systems}, issn = {1572-9680}, doi = {10.1007/s10457-018-0289-4}, pages = {21}, abstract = {This study investigates the spatial and temporal impact of microclimate conditions caused by poplar hedgerows in a short rotation alley cropping system (SRACS), and their effect on the atmospheric evaporative demand (AED) and the grain crop yield of winter wheat (Triticum aestivum var. Patras) in direct comparison to a common agricultural crop system. Microclimate was measured at nine positions distributed at the SRACS and an adjacent open field in Brandenburg State (Germany) from March to August 2016. Our hypothesis was that microclimate and AED was improved at SRACS, with traceable effects on the crop yield. The analysis of air temperature and water vapour deficit (VPD) data revealed significantly (p B 0.05) lower daytime values from June to August at the crop alley of the SRACS, which were generally most frequent at the poplar hedgerow and 3 m west positions. By contrast, wind speed was reduced at almost all the positions of our crop alley and during the entire measurement period during both day and night. The AED measured on sampling days in July was significantly (p B 0.001) reduced at the whole crop alley, with values from 24 to 32\% in comparison to the open field. We observed a strong linear relationship (R2 \& 0.78-0.99) between AED on one side and wind speed and VPD on the other side. The average grain yield within the SRACS was 16\% higher than on the OF. However, our microclimate data were insufficient to explain this yield surplus.}, language = {en} } @misc{RieserVesteThieletal., author = {Rieser, Jakob and Veste, Maik and Thiel, Michael and Sch{\"o}nbrodt-Stitt, Sarah}, title = {Coverage and Rainfall Response of Biological Soil Crusts Using Multi-Temporal Sentinel-2 Data in a Central European Temperate Dry Acid Grassland}, series = {Remote Sensing}, volume = {13}, journal = {Remote Sensing}, number = {16}, issn = {2072-4292}, abstract = {Biological soil crusts (BSCs) are thin microbiological vegetation layers that naturally develop in unfavorable higher plant conditions (i.e., low precipitation rates and high temperatures) in global drylands. They consist of poikilohydric organisms capable of adjusting their metabolic activities depending on the water availability. However, they, and with them, their ecosystem functions, are endangered by climate change and land-use intensification. Remote sensing (RS)-based studies estimated the BSC cover in global drylands through various multispectral indices, and few of them correlated the BSCs' activity response to rainfall. However, the allocation of BSCs is not limited to drylands only as there are areas beyond where smaller patches have developed under intense human impact and frequent disturbance. Yet, those areas were not addressed in RS-based studies, raising the question of whether the methods developed in extensive drylands can be transferred easily. Our temperate climate study area, the 'Lieberoser Heide' in northeastern Germany, is home to the country's largest BSC-covered area. We applied a Random Forest (RF) classification model incorporating multispectral Sentinel-2 (S2) data, indices derived from them, and topographic information to spatiotemporally map the BSC cover for the first time in Central Europe. We further monitored the BSC response to rainfall events over a period of around five years (June 2015 to end of December 2020). Therefore, we combined datasets of gridded NDVI as a measure of photosynthetic activity with daily precipitation data and conducted a change detection analysis. With an overall accuracy of 98.9\%, our classification proved satisfactory. Detected changes in BSC activity between dry and wet conditions were found to be significant. Our study emphasizes a high transferability of established methods from extensive drylands to BSC-covered areas in the temperate climate. Therefore, we consider our study to provide essential impulses so that RS-based biocrust mapping in the future will be applied beyond the global drylands}, language = {en} } @misc{SheppardBohnReckziegelBorrassetal., author = {Sheppard, Jonathan P. and Bohn Reckziegel, Rafael and Borrass, Lars and Chirwa, Paxie W. and Cuaranhua, Claudio J. and Hassler, Sibylle K and Hoffmeister, Svenja and Kestel, Florian and Maier, Rebekka and M{\"a}licke, Mirko and Morhart, Christopher and Ndlovu, Nicholas P. and Veste, Maik and Funk, Roger and Lang, Friedericke and Seifert, Thomas and du Toit, Ben and Kahle, Hans-Peter}, title = {Agroforestry: An Appropriate and Sustainable Response to a Changing Climate in Southern Africa?}, series = {Sustainability}, volume = {12}, journal = {Sustainability}, number = {17}, doi = {10.3390/su12176796}, abstract = {Agroforestry is often discussed as a strategy that can be used both for the adaptation to and the mitigation of climate change effects. The climate of southern Africa is predicted to be severely affected by such changes. With agriculture noted as the continent's largest economic sector, issues such as food security and land degradation are in the forefront. In the light of such concerns we review the current literature to investigate if agroforestry systems (AFS) are a suitable response to the challenges besetting traditional agricultural caused by a changing climate. The benefits bestowed by AFS are multiple, offering ecosystem services, influence over crop production and positive impacts on rural livelihoods through provisioning and income generation. Nevertheless, knowledge gaps remain. We identify outstanding questions requiring further investigation such as the interplay between trees and crops and their combination, with a discussion of potential benefits. Furthermore, we identify deficiencies in the institutional and policy frameworks that underlie the adoption and stimulus of AFS in the southern African region. We uphold the concept that AFS remains an appropriate and sustainable response for an increased resilience against a changing climate in southern Africa for the benefit of livelihoods and multiple environmental values}, language = {en} } @misc{VesteHerppich, author = {Veste, Maik and Herppich, Werner B.}, title = {Comparative ecophysiology of the leaf-succulents Augea capensis (C3) and Malephora purpureo-crocea (CAM) in the Knersvlakte, Succulent Karoo, South Africa}, series = {Flora}, volume = {278}, journal = {Flora}, issn = {1618-0585}, doi = {10.1016/j.flora.2021.151807}, pages = {9}, abstract = {The generally accepted assumption that CAM is an important adaptation to the drought conditions in arid deserts is mainly based on studies in controlled environments comparing the respective photosynthetic pathways in plants of different morphology. Comparative long-term field studies on the ecophysiology of C3- and CAM succulents co-occurring in the same desert habitat are too rare to satisfactorily answer the old question whether the metabolic pathway or the succulence is more important to guarantee survival in such a harsh habitat. Thus, relevant ecophysiological parameters were repeatedly monitored on plants of the leaf succulents Augea capensis (C3) and Malephora purpureo-crocea (CAM), which commonly dominate a habitat in the Knersvlakte, Namaqualand, South Africa. Under identical conditions in the same habitat, carbon gain of the C3 species was higher than that of the CAM plant, but their WUE lower and maximum photosynthetic activity nearly the same. In M. purpureo-crocea, irrigation induced rapid whole day stomatal opening at drastically increased daytime but decreased night-time CO2-uptake, while respective responses of the C3 species were delayed. These different response dynamics were due to different rooting depth, root morphology and water acquisition strategy of the flat rooting CAM and the deep-rooting C3 species. This, however, may not explain the highly similar growth success. Anyway, the results verify that CAM provides no advantage over C3 for long-term survival in the same desert environment in morphologically similar succulents.}, language = {en} } @misc{GriebenowMakungaPrivettetal., author = {Griebenow, Stian and Makunga, Nokwanda P. and Privett, Sean and Strauss, Paula and Veste, Maik and Kleinert, Aleysia and Valentine, Alexander J.}, title = {Soil pH influences the organic acid metabolism and exudation in cluster roots of protea species from the Mediterranean-type fynbos ecosystem, Western Cape, South Africa}, series = {Rhizosphere}, volume = {Vol. 21}, journal = {Rhizosphere}, doi = {10.1016/j.rhisph.2022.100486}, abstract = {In nutrient-poor ecosystems, certain plant families have evolved specific adaptations for phosphate acquisition, namely cluster roots or proteoid roots. Cluster rooted species have a unique suite of adaptations that enable them to survive in nutrient poor ecosystems, such as the Fynbos biome of South Africa. The Fynbos biome has heterogeneous soils which caused radiation of varying soil pH within small localised areas. Previous studies on cluster rooted species ignored the possibility that cluster root functioning may differ at varying soil pH levels and soil types. Therefore, two native Fynbos protea species, Protea cynaroides (L.) L. and Protea obtusifolia H.Buek ex Meisn. were compared to assess the impact of different soil pH levels on organic acid metabolism and exudation in cluster rooted species. Our results show that cluster roots of the acidic-soil grown P. cynaroides is more effective and more efficient than that of the alkaline-soil grown P. obtusifolia. Our findings indicate that the mechanisms for P acquisition vary greatly, depending on substrate and plant organ type. This suggests that the metabolism of each species is adapted to specific soil pH and that these species have evolutionary adapted their P acquisition mechanisms for these extreme soils. The limited nutrient availability and variation in soil pH South African soils has led to various localised adaptations for cluster rooted species.}, language = {en} }