@inproceedings{HalkeGypserMantovanietal., author = {Halke, Christian and Gypser, Stella and Mantovani, Dario and Lebzien, Stefan and Freese, Dirk and Veste, Maik}, title = {Yield, transpiration and growth of the new bioenergy crop IGNISCUM Candy under different water regimes}, series = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, booktitle = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, editor = {Jeltsch, Florian and Joshi, Jasmin}, pages = {32 -- 33}, abstract = {There is a growing global need to produce more energy and reducing greenhouse gas emissions. One possible source of renewable energy in parts of Europe is the use of crop for bioenergy production. Currently, maize dominates the biogas production. For a diversified production of substrates alternative crops needs to be evaluated for their sustainable utilization and ecological integration into agro-systems. The new bioenergy plants IGNISCUM Candy and IGNISCUM Basic are cultivars of the Sakhalin Knotweed (Fallopia sachalinensis, Fam. Polygonaceae), which are characterized by a high annual biomass production. Information on the crop production of this species is rare. Hence, understanding plant response to the combinations of water and nutrients availability is crucial for the development of sustainable plant production. In greenhouse experiments we investigate the interrelations between nutrient supply, biomass production, and plant ecophysiology. For the determination of yield-transpiration relations at whole plant level we used a wick lysimeter system, which allows us to study plant growth under controlled water regimes and to calculate the plant transpiration. The irrigation is supplied by an automatic drip irrigation system and computer-controlled in relation to the volumetric soil water content. Four different water treatments associated to the SWC range from well-watered to drought stressed plants. The influence of plant sizes on plant water use was investigated under different nitrogen supply. The fertilizer applied is calcium ammonium nitrate (N) and the rates for the four treatments are 0, 50, 100, 150 kg N/ha at the beginning of the growing season. Plant transpiration is calculated on the basis of water input, storage and drainage in weekly intervals. The cumulative transpiration of the plants during the growing season is between 49 L (drought stressed) and 141 L (well-watered) per plant, respectively. We calculated a transpiration coefficient of 525 Liters per kg dry biomass.}, language = {en} } @inproceedings{ZaplataKollmannUlrichetal., author = {Zaplata, Markus Klemens and Kollmann, Johannes and Ulrich, Werner and Winter, Susanne and Schaaf, Wolfgang and Elmer, Michael and Gerwin, Werner and Fischer, Anton}, title = {Cover balance or degree of autocorrelation? It is the same and integratively traces pattern formation during succession}, series = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, booktitle = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, editor = {Jeltsch, Florian and Joshi, Jasmin}, pages = {228 -- 229}, abstract = {It is widely acknowledged that increasing complexity is a key attribute of ecosystem genesis. This is particularly true for primary succession on homogeneous substrates. However, a mechanistic understanding of spatial colonisation and pattern formation during primary succession has not been achieved yet. Thus, we studied this topic for 7 years within an experimental catchment (6 ha) established in the post-mining landscape of eastern Germany. Equidistant permanent plots (120 plots {\`a} 25m²) allowed for autocorrelation analyses, and thus tracing the spatial development of species cover performance. For each species tested, the "cover balance" first increased due to colonization, while decreasing in the course of succession. Drawing a benefit from these temporal trends, we suggested cover balance levels revealed by autocorrelation analyses to best indicate well-defined phases in primary succession at spatial entities. Hence, with the help of this spatial approach, terrestrial succession can be understood now much better at the most general level of the hierarchy provided by Pickett et al. (1987). In accordance with these authors, at subordinated levels of the causal hierarchy differential species performance might get collectively explained by contributing processes or conditions, such as ecophysiological traits, life history strategies, competition and allelopathy of the occurring plant species. Further research is needed to understand their relative contributions to the pattern formation.}, language = {en} } @inproceedings{RisseBuhlHagedornDuemigetal., author = {Risse-Buhl, Ute and Hagedorn, Frank and D{\"u}mig, Alexander and Gessner, Mark O. and Schaaf, Wolfgang and Nii-Annang, Seth and Gerull, Linda and Mutz, Michael}, title = {Dynamics, chemical properties and bioavailability of DOC in an early successional catchment}, series = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, booktitle = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, editor = {Jeltsch, Florian and Joshi, Jasmin}, publisher = {Gesellschaft f{\"u}r {\"O}kologie}, address = {Berlin}, pages = {S. 377}, abstract = {The dynamics of dissolved organic carbon (DOC) have been intensively studied in mature ecosystems, but little is known about DOC dynamics and the significance of DOC as a substrate for microbial activity in early-successional catchments. We determined the concentration, chemical composition, radiocarbon age, and bioavailability of DOC along the hydrological flow path from soil solution to a downstream pond in a recently constructed catchment (Chicken Creek Catchment, Germany). Soil solution, upwelling ground water, subsurface water in an alluvial fan, and pond water all had high DOC concentrations (averaged 6.0 - 11.6 mg DOC L-1), despite small carbon stocks in either vegetation or soil of the catchment. The mean 14C age of DOC in upwelling ground water was 2600 to 2800 years. Solid-state CPMAS 13C NMR revealed a higher proportion of aromatic compounds (32\%) and a lower proportion of carbohydrates (33\%) in upwelling ground water compared to pond water (18\% and 45\%, respectively). 14C age and 13C NMR spectra suggest that DOC was partly mobilized from charred organic matter inherent in the Quaternary substrate. In a 70-days incubation experiment, 20\% of the total DOC was found to be bioavailable, irrespective of the water type. Origin of the microbial communities within the catchment (enriched from soil, stream sediment or pond water) had only marginal effects on overall DOC utilization. Overall, our data suggest that both recent and old DOC support microbial activity during early ecosystem succession, although a large fraction of the DOC is recalcitrant and eventually exported from the catchment once it has been mobilized.}, language = {en} } @inproceedings{MantovaniVesteBoldtBurischetal., author = {Mantovani, Dario and Veste, Maik and Boldt-Burisch, Katja and Fritsch, Simone}, title = {Black locust (Robinia pseudoacacia L.) root growth response to different irrigation regimes}, series = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, booktitle = {Gf{\"O} 43rd Annual Meeting, Building bridges in ecology, linking systems, scales and disciplines, September 9 to 13, 2013, Potsdam, Germany}, editor = {Jeltsch, Florian and Joshi, Jasmin}, pages = {33 -- 34}, abstract = {Robinia pseudoacacia L. is a pioneer tree species native from North America. Its original range is a climatic region classified as humid to sub-humid, with a mean annual precipitation of 1020 to 1830 mm. However, it grows under a wide range of edaphic and climatic conditions and the species has proven to be relatively drought tolerant. In central Europe, with a continental climate, the species has been successfully cropped for biomass production also on marginal land, even in post-­-mining areas characterized by water limitation and harsh edaphic conditions. Due its drought tolerance, fast resprouting rate and its ability to live in symbiosis with Rhizobia and thus fix atmospheric nitrogen, black locust could become a key species for short-­-rotation plantation on marginal land. Several studies have been already carried out to quantify the black locust above ground production and its water use efficiency. However, the relation between the black locust biomass allocation, root system development and plant water use has still to be examined. In our study we evaluated the drought stress effect on black locust below ground biomass production, root distribution, and the root and rhizobial association. Different irrigation regimes were chosen to test the plant's performance in a lysimeter experiment, under semi-­-controlled environmental conditions, for the duration of two vegetation periods. From the results obtained we determined the root biomass allocation under different irrigation regimes and identified the close relation between the soil water condition and the rhizobial association.}, language = {en} } @inproceedings{BoehmKanzlerFreese, author = {B{\"o}hm, Christian and Kanzler, Michael and Freese, Dirk}, title = {Agroforstsysteme in S{\"u}dbrandenburg - Effekte auf Mikroklima und Wasserqualit{\"a}t}, series = {Nachhaltige Erzeugung von Nachwachsenden Rohstoffen, Tagung vom 04. bis 06. September 2013, Weihenstephan}, booktitle = {Nachhaltige Erzeugung von Nachwachsenden Rohstoffen, Tagung vom 04. bis 06. September 2013, Weihenstephan}, editor = {Pekrun, C. and Wachendorf, Magnus and Francke-Weltmann, L.}, publisher = {Verlag Halm}, address = {G{\"o}ttingen}, pages = {180 -- 181}, abstract = {Der Agrarholzanbau stellt allgemein eine sehr extensive Form der landwirtschaftlichen Fl{\"a}chennutzung dar. So k{\"o}nnen beispielsweise die Winderosion oder der Stoffaustrag in das Grundwasser durch den Anbau von B{\"a}umen auf ackerbaulich genutzten Standorten deutlich reduziert werden. Durch die Kombination von B{\"a}umen und konventionellen Ackerfr{\"u}chten (Agroforstwirtschaft) k{\"o}nnen auch angrenzende Feldfruchtbereiche und somit der gesamte Ackerschlag von diesen positiven Effekten des Agrarholzanbaus profitieren. Im Rahmen dieser Studie wurde beispielhaft untersucht, ob und inwieweit der streifenf{\"o}rmige Anbau (Alley-Cropping) von im Kurzumtrieb bewirtschaftetem Agrarholz einerseits zu einer Verbesserung des Windschutzes und andererseits zu einer Erh{\"o}hung der Grundwasserqualit{\"a}t beitragen kann.}, language = {de} } @inproceedings{HinzGerwinSchaafetal., author = {Hinz, Christoph and Gerwin, Werner and Schaaf, Wolfgang and Elmer, Michael and Fl{\"u}hler, Hannes and Holl{\"a}nder, Hartmut M. and H{\"u}ttl, Reinhard F.}, title = {State transitions in the artificial catchment Huehnerwasser (Chicken Creek): Ecosystems development 8 years after initialization : abstract}, series = {Soil-mediated Drivers of Coupled Biogeochemical and Hydrological Processes across Scales, AGU Chapman Conference Biosphere II, Tucson, Arizona, USA, 21-24 October 2013}, booktitle = {Soil-mediated Drivers of Coupled Biogeochemical and Hydrological Processes across Scales, AGU Chapman Conference Biosphere II, Tucson, Arizona, USA, 21-24 October 2013}, pages = {S. 34}, language = {en} } @incollection{BoehmQuinkensteinFreese, author = {B{\"o}hm, Christian and Quinkenstein, Ansgar and Freese, Dirk}, title = {Ertragsabsch{\"a}tzung von holzartiger Biomasse in Kurzumtriebsplantagen aus Robinie (Robinia Pseudoacacia L.) anhand allometrischer Funktionen}, series = {Energieholzproduktion und bodenphysikalische Untersuchungen auf Rekultivierungsfl{\"a}chen des Niederlausitzer Braunkohlereviers}, booktitle = {Energieholzproduktion und bodenphysikalische Untersuchungen auf Rekultivierungsfl{\"a}chen des Niederlausitzer Braunkohlereviers}, editor = {Kr{\"u}mmelbein, Julia and Raab, Thomas and H{\"u}ttl, Reinhard F.}, publisher = {BTU}, address = {Cottbus}, isbn = {978-3-937728-12-4}, pages = {61 -- 76}, language = {de} } @misc{OPUS4-9614, title = {Landschaftswandel - Landscape Change}, editor = {Raab, Thomas and Raab, Alexandra and Gerwin, Werner and Schopper, Franz}, publisher = {Chair of Geopedology and Landscape Development}, address = {Cottbus}, pages = {105}, language = {de} }