TY - JOUR A1 - Wecker, Birgit A1 - Schaaf, Wolfgang A1 - Hüttl, Reinhard F. T1 - Mikrokosmenstudie organischer Auflagen unter besonderer Berücksichtigung der Schwefeldynamik Y1 - 2001 ER - TY - JOUR A1 - Schaaf, Wolfgang T1 - Entwicklung des Bodenchemismus in einer Chronosequenz rekultivierter Kippenstandorte des Lausitzer Braunkohlereviers Y1 - 2001 ER - TY - CHAP A1 - Dilly, Oliver A1 - Nii-Annang, Seth A1 - Schrautzer, J. A1 - Schwartze, P. A1 - Breuer, P. A1 - Pfeiffer, Eva-Maria A1 - Gerwin, Werner A1 - Schaaf, Wolfgang A1 - Freese, Dirk A1 - Veste, Maik A1 - Hüttl, Reinhard F. ED - Müller, Felix ED - Baessler, Cornelia ED - Schubert, Hendrik ED - Klotz, Stefan T1 - Ecosystem Manipulation and Restoration on the Basis of Long-Term Conceptions T2 - Long-Term Ecological Research Between Theory and Application Y1 - 2010 SN - 978-90-481-8781-2 SP - 411 EP - 428 PB - Springer Netherlands CY - Dordrecht ER - TY - GEN A1 - Schaaf, Wolfgang T1 - The role of geodiversity in ecosystem development T2 - EGU General Assembly 2020, Online, 4–8 May 2020 Y1 - 2020 U6 - https://doi.org/10.5194/egusphere-egu2020-1415 ER - TY - CHAP A1 - Zimmermann, Claudia A1 - Chabbi, S. A1 - Schaaf, Wolfgang T1 - Microcosm experiments to study the interaction of solid and solute phases during initial soil development T2 - EGU General Assembly 2009, Vienna, Austria, 19 – 24 April 2009 Y1 - 2009 N1 - EGU2009-11991 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - JOUR A1 - Schaaf, Wolfgang T1 - Böden gestörter Kulturlandschaften am Beispiel der Bergbaulandschaft Niederlausitz Y1 - 2003 ER - TY - CHAP A1 - Schaaf, Wolfgang A1 - Zimmermann, Claudia T1 - Effect of pattern formation on C and N turnover heterogeneity in initial soils T2 - European Geosciences Union, General Assembly 2013, Vienna, Austria, 07 – 12 April 2013 N2 - The formation of vegetation patterns and hydrological processes, among others, result in soil heterogeneity in newly exposed land surfaces.We studied the effect of these developling structures on carbon and nitrogen trunover in soils of the artificial catchment Chicken Creek (Schaaf et al. 2011, 2012). Substrates with different physical and geochemical properties in combination with different labelled plant litter materials were studied in a microcosm experiment over a period of 80 weeks. Main objectives of the microcosm experiment were to determine the transformation processes of C and N from litter decomposition within the gaseous, liquid and solid phase, the interaction with mineral surfaces and its role for the establishment of biogeochemical cycles. The microcosm experiments were established in a climate chamber at constant 10 °C. In total, 48 soil columns (diameter: 14.4 cm; height: 30 cm) were filled with two different quaternary substrates (sand and loamy sand) representing the textural variation within the catchment at a bulk density of 1.4-1.5 g cm-3. The columns were automatically irrigated with artificial rainwater four times a day with 6.6 ml each (corresponding to 600 mm yr-1). The gaseous phase in the headspace of the microcosms was analyzed continuously for CO2 and N2O concentrations. C and N transformation processes were studied using 13C and 15N labelled litter of two different plant species occurring at the catchment (Lotus corniculatus, Calamagrostis epigejos) that was incorporated into the microcosm surface. By including litter from species with wide distribution within the catchment and soil substrates representing the main variation types of the sediments used for catchment construction we were able to characterize the general function of these sub-patches within the catchment with respect to litter decomposition, soil solution composition, DOC and nutrient leaching, and impact on the mineral soil phase. The results suggest that initial differences in substrate composition in combination with invading vegetation leads to the development of patterns with different biogeochemical process intensities within the catchment. These patterns are not mere additive effects of substrates plus litter, but reflect differences in element cycling. Y1 - 2013 UR - http://meetingorganizer.copernicus.org/EGU2013/EGU2013-10412.pdf N1 - EGU2013-10412 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - CHAP A1 - Schaaf, Wolfgang A1 - Elmer, Michael A1 - Gerwin, Werner A1 - Fischer, Anton A1 - Zaplata, Markus K. A1 - Nenov, Rossen T1 - Feedbacks between structures and processes during initial ecosystem development in an artificial catchment T2 - European Geosciences Union, General Assembly 2013, Vienna, Austria, 07 – 12 April 2013 N2 - We studied the role of strutures and processes and their feedbacks during initial ecosystem development in the artificial catchment Chicken Creek. During the first seven years, considerable changes within the catchment were observed. Both internal and external factors could be identified as driving forces for the formation of structures and patterns in the artificial catchment. Initial structures formed by the construction process and initial substrate characteristics were decisive for the distribution and flow of water. External factors like episodic events triggered erosion and dissection during this initial phase, promoted by the low vegetation cover and the unconsolidated sandy substrate. The transformation of the initial geo-system into areas with evolving terrestrial or aquatic characteristics and from a very episodic to a more permanent stream network and discharge, together with the observed vegetation dynamics increased site diversity and heterogeneity with respect to water and nutrient availability and transformation processes compared to the more homogenous conditions at point zero. The processes and feedback mechanisms in the initial development of a new landscape may deviate in rates, intensity and dominance from those known from mature ecosystems. It is therefore crucial to understand these early phases of ecosystem development and to disentangle the increasingly complex interactions between the evolving terrestrial and aquatic, biotic and abiotic compartments of the system. Artificially created catchments could be a suitable tool to study these initial developments at the landscape scale under known, designed and defined boundary conditions. Y1 - 2013 UR - http://meetingorganizer.copernicus.org/EGU2013/EGU2013-6837.pdf N1 - EGU2013-6837 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - CHAP A1 - Risse-Buhl, Ute A1 - Nii-Annang, Seth A1 - Hagedorn, Frank A1 - Schaaf, Wolfgang A1 - Dümig, Alexander A1 - Schloter, Michael A1 - Gessner, Mark O. A1 - Mutz, Michael T1 - Can old organic carbon drive microbial activity in surface waters of a newly created landscape? T2 - Structures and processes of the initial ecosystem development, 1st International Conference assoc. with 4th Meeting of Young Researchers in Earth Sciences (MYRES), 20-24 Sept. 2010, Cottbus, Germany Y1 - 2010 SP - S. 93 PB - BTU CY - Cottbus ER - TY - CHAP A1 - Papritz, Andreas A1 - Dümig, Alexander A1 - Zimmermann, Claudia A1 - Felderer, Bernd A1 - Gerke, Horst H. A1 - Kögel-Knabner, Ingrid A1 - Schaaf, Wolfgang A1 - Schulin, Rainer T1 - Spatial correlation of soil properties in the artificial catchment T2 - EGU General Assembly 2010, held in Vienna, Austria, 02 – 07 May 2010 Y1 - 2010 N1 - EGU2010-9361-1 PB - European Geophysical Society CY - Katlenburg-Lindau ER -