@inproceedings{SchaafGerwinVesteetal., author = {Schaaf, Wolfgang and Gerwin, Werner and Veste, Maik and Biemelt, Detlef and H{\"u}ttl, Reinhard F.}, title = {Monitoring program at the artificial catchment "chicken creek", Germany}, language = {en} } @inproceedings{ZaplataVestePohleetal., author = {Zaplata, Markus K. and Veste, Maik and Pohle, Ina and Sch{\"u}mberg, Sabine and Abreu Schonert, Iballa and Hinz, Christoph}, title = {Experimental investigation of the early interaction between cyanobacterial soil crusts and vascular plants}, series = {European Geosciences Union, General Assembly 2016, Vienna, Austria}, booktitle = {European Geosciences Union, General Assembly 2016, Vienna, Austria}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, abstract = {While there are hints that biological soil crusts (BSCs) can constitute physical barriers for the emergence of vascular plants, a conceptual approach for the quantitative evaluation of these effects is still missing. Here we present an experimental design to test the emergence of seedlings in situ with (i) capping natural intact, (ii) destroyed and (iii) removed BSC. The selected field site is directly adjacent to the constructed H{\"u}hnerwasser catchment (Lusatia, Germany). This site exists since the end of 2008 and consists of loamy sand. Serving as proxy for seedling thrust, we inserted pre-germinated seeds of three confamiliar plant species with different seed masses (members of the Fabaceae family: Lotus corniculatus L., Ornithopus sativus Brot., and Glycine max (L.) Merr.). In each treatment as well as in the control group planting depths were 10 mm. We took care that experimental plots had identical crust thickness, slightly less than 4 mm, serving as proxy for mechanical resistance. A plot became established as follows: Firstly, the pristine crusted surface was vertically cut. To the windward side the BSC remained intact (i: "with BSC" stripe). To the downwind side soil material was temporarily excavated for laterally inserting the seeds beneath the surface of the first stripe. Then at the thereby disturbed second stripe pulverised BSC material became filled as a top layer (ii: "BSC mix" stripe). From the next stripe the BSC was removed (iii : "no BSC" stripe). Thus each plot had each experimental group in spatial contiguity (within 50 cm * 50 cm). The overall 50 plots were distributed across an area of 40 m * 12 m. When individuals of a species either emerged at all stripes, "XXX", or at no stripe of a plot, "- - -", there was no reason to suppose any effect of a crust. The "-XX" emergence pattern (depicting the appearance of seedlings in both stripes possessing manipulated surfaces) points towards hindrance more clearly than "-X-" or "- - X". Altogether eight possible combinations exist. Combinatorial analysis turned out that seedling emergence had been notably impeded for light-weighted seeds but little for heavy seeds. Repeated recordings enable to account for adaptable emergence of seedlings according to varying crust conditions - in spatial as well as temporal terms. The proposed experimental procedure hence is highly recommended as a viable instrument to further investigate filter and facilitation processes between BSCs and vascular plants.}, language = {en} } @misc{ZaplataSchuembergKidronetal., author = {Zaplata, Markus K. and Sch{\"u}mberg, Sabine and Kidron, Giora J. and Ramm, Jessica and Veste, Maik}, title = {Impacts of cyanobacteria-dominated biological soil crusts on seedling emergence and fate: an in situ experiment}, series = {Pant and Soil : an International Journal on Plant-Soil Relationships}, journal = {Pant and Soil : an International Journal on Plant-Soil Relationships}, doi = {10.1007/s11104-024-06869-3}, pages = {16}, abstract = {Background and aims Biological soil crusts (BSCs) co-occur with vascular plants in many ecosystems. Nevertheless, little is known regarding the interaction among BSCs and vascular plants, and no standard methods exist aiming to evaluate BSC-plant interactions. While some reports emphasized the inhibition effect of BSCs on germination, others reported the opposite or did not find any differences between germination under crusted and non-crusted conditions. Contradictory findings were also reported regarding the BSC effects on vascular plants after germination, with some reports claiming that BSCs promote growth, while others claim the opposite. Methods By a seed addition experiment (using light and heavy seeds of three species belonging to the Fabaceae family) in an early-successional system in Germany, we tested in situ the emergence of seedlings under variable surface conditions (cyanobacterial crust, disturbed and removed crust), and quantified crust-plant interactions (survival, flowering) during and following seedling emergence. Results In comparison to an average of 8\% of the light Lotus corniculatus and 20\% of the light Ornithopus sativus that emerged through the cyanobacterial BSC, 76\% of the heavy Glycine max emerged. Once emerged, the crust did not significantly affect the survival, growth, biomass, or flowering of G. max, whereas many of the seedlings from lightweight seeds dried up soon after emergence. The thickness of the cyanobacterial biocrust had no influence on Fabaceae emergence. Conclusion The cyanobacterial BSC acted as a filter that hindered the emergence of the lightweight seeds.}, language = {en} } @misc{GerwinSchaafBiemeltetal., author = {Gerwin, Werner and Schaaf, Wolfgang and Biemelt, Detlef and Winter, S. and Fischer, Annette and Veste, Maik and H{\"u}ttl, Reinhard F.}, title = {Overview and first results of ecological monitoring at the artificial watershed Chicken Creek (Germany)}, series = {Physics and Chemistry of the Earth}, volume = {36}, journal = {Physics and Chemistry of the Earth}, number = {1-4}, issn = {1873-5193}, pages = {61 -- 73}, 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} } @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} }