TY - CHAP A1 - Rolland, Wolfgang A1 - Gerke, Horst H. A1 - Biemelt, Detlef A1 - Schaaf, Wolfgang A1 - Kügler, R. A1 - Kügler, Marcus T1 - Zusammenschau Transportprozesse Y1 - 2000 ER - TY - GEN A1 - Schaaf, Wolfgang A1 - Zech, Wolfgang T1 - Düngung mit gebranntem Magnesit und Magnesiumhydroxid zur Standortmelioration in einem stark geschädigten Fichtenökosystem Y1 - 1993 UR - https://onlinelibrary.wiley.com/doi/abs/10.1002/jpln.19931560413 ER - TY - GEN A1 - Schaaf, Wolfgang A1 - Zech, Wolfgang T1 - Element turnover in a heavily damaged Norway spruce ecosystem influenced by N deposition Y1 - 1993 UR - https://link.springer.com/article/10.1007/BF00029098 SP - 277 EP - 285 ER - TY - CHAP A1 - Schaaf, Wolfgang A1 - Zech, Wolfgang T1 - Effects of calcined magnesite, magnesium hydroxide and "Geosan" on soil properties in declining Norway spruce stands (NE Bavaria) Y1 - 1991 UR - https://link.springer.com/content/pdf/10.1007%2FBF02385237.pdf ER - TY - CHAP A1 - Kaupenjohann, Martin A1 - Schaaf, Wolfgang A1 - Zech, Wolfgang ED - Teller, Anne T1 - Decline of Norway spruce in NE-Bavaria, FRG T2 - Responses of forest ecosystems to environmental changes, proceedings of the First European Symposium on Terrestrial Ecosystems: Forests and Woodlands, held at Florence, Italy, 20 - 24 May 1991 Y1 - 1992 SN - 1-85166-878-0 SP - 586 EP - 587 PB - Elsevier CY - London ER - TY - GEN A1 - Fischer, Thomas A1 - Veste, Maik A1 - Schaaf, Wolfgang A1 - Dümig, Alexander A1 - Kögel-Knabner, Ingrid A1 - Wiehe, Wolfgang A1 - Bens, Oliver A1 - Hüttl, Reinhard F. T1 - Initial pedogenesis in a topsoil crust 3 years after construction of an artificial water catchment in Brandenburg, NE Germany T2 - Biogeochemistry N2 - Cyanobacteria and green algae present in biological soil crusts are able to colonize mineral substrates even under extreme environmental conditions. As pioneer organisms, they play a key role during the first phases of habitat colonization. A characteristic crust was sampled 3 years after installation of the artificial water catchment “Chicken creek”, thus representing an early successional stage of ecosystem development. Mean annual rainfall and temperature were 559 mm and 9.3°C, respectively. We combined scanning electron microscopy (SEM/EDX) and infrared (FTIR) microscopy to study the contact zone of algal and cyanobacterial mucilage with soil minerals in an undisturbed biological soil crust and in the subjacent sandy substrate. The crust was characterized by an approximately 50 μm thick surface layer, where microorganisms resided and where mineral deposition was trapped, and by an approximately 2.5 mm thick lower crust where mineral particles were stabilized by organo-mineral structures. SEM/EDX microscopy was used to determine the spatial distribution of elements, organic compounds and minerals were identified using FTIR microscopy and X-ray diffraction (XRD). The concentration of organic carbon in the crust was about twice as much as in the parent material. Depletion of Fe, Al and Mn in the lower crust and in the subjacent 5 mm compared to the geological substrate was observed. This could be interpreted as the initial phase of podzolization. Existence of bridging structures between mineral particles of the lower crust, containing phyllosilicates, Fe compounds and organic matter (OM), may indicate the formation of organo-mineral associations. pH decreased from 8.1 in the original substrate to 5.1 on the crust surface 3 years after construction, pointing to rapid weathering of carbonates. Weathering of silicates could not be detected. Y1 - 2010 U6 - https://doi.org/10.1007/s10533-010-9464-z SN - 1573-515X VL - 101 IS - 1-3 SP - 165 EP - 176 ER - TY - CHAP A1 - Biemelt, Detlef A1 - Schaaf, Wolfgang A1 - Knoche, Dirk T1 - Stoff- und Wasserhaushalt von Kippenstandorten im Lausitzer Braunkohlerevier T2 - Vortragsband des 4. GBL-Kolloquiums vom 26. - 28. November 1997 in Cottbus, Ergebnisse und Empfehlungen Y1 - 1998 SN - 3-510-95822-5 SP - 122 EP - 125 PB - Schweizerbart CY - Stuttgart ER - TY - CHAP A1 - Pohle, Ina A1 - Hu, Yuzhu A1 - Schaaf, Wolfgang A1 - Gerwin, Werner A1 - Maurer, Thomas A1 - Hinz, Christoph T1 - Hydrogeochemische Signaturen der Einzugsgebietsentwicklung – die Rolle der Calcium- und Sulfatfreisetzung im Hühnerwassereinzugsgebiet T2 - Abstract-Sammlung zu Posterbeiträgen, eingereicht zum Tag der Hydrologie in Trier 2017, 23. 03. – 24. 03. 2017 Y1 - 2017 UR - https://www.uni-trier.de/fileadmin/fb6/prof/PHY/PDF-Dateien/TdH2017_4Abstracts_Poster.pdf SP - S. 5 ER - TY - CHAP A1 - Hinz, Christoph A1 - Schaaf, Wolfgang A1 - Gerwin, Werner A1 - Pohle, Ina T1 - Entwicklung eines transienten hydrologischen Systems: Zustandsänderungen des künstlichen Einzugsgebiets Hühnerwasser T2 - Abstract-Sammlung zu Posterbeiträgen, eingereicht zum Tag der Hydrologie in Trier 2017, 23. 03. – 24. 03. 2017 Y1 - 2017 UR - https://www.uni-trier.de/fileadmin/fb6/prof/PHY/PDF-Dateien/TdH2017_4Abstracts_Poster.pdf SP - S. 1 ER - TY - GEN A1 - Gerwin, Werner A1 - Schaaf, Wolfgang A1 - Biemelt, Detlef A1 - Winter, S. A1 - Fischer, A. A1 - Veste, Maik A1 - Hüttl, Reinhard F. T1 - Overview and first results of ecological monitoring at the artificial watershed Chicken Creek (Germany) T2 - Physics and Chemistry of the Earth Y1 - 2011 SN - 1873-5193 VL - 36 IS - 1-4 SP - 61 EP - 73 ER - TY - CHAP A1 - Biemelt, Detlef A1 - Schaaf, Wolfgang A1 - Mazur, Kai T1 - Hydrology and water quality Y1 - 2010 UR - http://opus.kobv.de/btu/volltexte/2011/2073/ ER - TY - GEN A1 - Schaaf, Wolfgang A1 - Biemelt, Detlef A1 - Hüttl, Reinhard F. T1 - Initial development of the artificial catchment 'Chicken Creek' - monitoring and survey 2005-2008 Y1 - 2010 UR - http://opus.kobv.de/btu/volltexte/2011/2073/pdf/Ecol_Dev_Vol_2_2010.pdf SN - 1867-7800 PB - Cottbus : Research Center Landscape Development and Mining Landscapes (FZLB) ER - TY - GEN A1 - Schaaf, Wolfgang A1 - Biemelt, Detlef A1 - Fischer, A. T1 - Formation of spatial structures and patterns during the first five years of the artificial catchment ´Chicken Creek´ T2 - Structures and processes of the initial ecosystem development, 1st International Conference associated with 4th Meeting of Young Researchers in Earth Sciences (MYRES), 20-24 September 2010, Cottbus, Germany, proceedings Y1 - 2010 UR - https://www-docs.b-tu.de/chicken-creek/public/Proceedings_TR38_2010.pdf SP - S. 104 PB - BTU CY - Cottbus ER - TY - CHAP A1 - Nenov, Rossen A1 - Vogt, Silvio A1 - Elmer, Michael A1 - Schaaf, Wolfgang A1 - Biemelt, Detlef T1 - Monitoring installations at the Chicken Creek catchment T2 - Structures and processes of the initial ecosystem development, 1st International Conference associated with 4th Meeting of Young Researchers in Earth Sciences (MYRES), 20-24 September 2010, Cottbus, Germany, proceedings Y1 - 2010 UR - https://www-docs.b-tu.de/chicken-creek/public/Proceedings_TR38_2010.pdf SP - S. 84 PB - BTU CY - Cottbus ER - TY - CHAP A1 - Elmer, Michael A1 - Schaaf, Wolfgang A1 - Biemelt, Detlef T1 - Environmental monitoring at the Chicken Creek catchment T2 - Structures and processes of the initial ecosystem development, 1st International Conference associated with 4th Meeting of Young Researchers in Earth Sciences (MYRES), 20-24 September 2010, Cottbus, Germany, proceedings Y1 - 2010 UR - https://www-docs.b-tu.de/chicken-creek/public/Proceedings_TR38_2010.pdf SP - S. 27 PB - BTU CY - Cottbus ER - TY - CHAP A1 - Schaaf, Wolfgang A1 - Gerwin, Werner A1 - Veste, Maik A1 - Biemelt, Detlef A1 - Hüttl, Reinhard F. T1 - Monitoring program at the artificial catchment "chicken creek", Germany Y1 - 2008 ER - TY - GEN A1 - Schaaf, Wolfgang A1 - Gerwin, Werner A1 - Grünewald, Uwe A1 - Hüttl, Reinhard F. A1 - Kögel-Knabner, Ingrid A1 - Munch, Jean Charles T1 - Patterns and processes of initial ecosystem development in an artificial catchment Y1 - 2008 ER - TY - GEN A1 - Moghadas, Davood A1 - Schaaf, Wolfgang A1 - Gerwin, Werner A1 - Badorreck, Annika A1 - Hüttl, Reinhard F. T1 - Chicken Creek data portal: a web-based R-Shiny platform for terrestrial data repository T2 - Geophysical Research Abstracts N2 - Exploring hydrological and ecological processes plays a key role in understanding ecosystem development. In this respect, the constructed catchment, Chicken Creek (Hühnerwasser), has been established to promote fundamental and interdisciplinary scientific research. Since 2005, an on-going monitoring program has been established in this catchment to measure hydrological, biological, meteorological, and pedological parameters during the ecological development of the site. This comprehensive and multidisciplinary monitoring program has produced a large and diverse data set. Managing and exploring such a complex data set for research purposes can be a cumbersome task. As a consequence, we developed an online data portal https://www.b-tu.de/chicken-creek/apps/datenportal/ to efficiently handle the data from Chicken Creek catchment. The portal was constructed using R programming language, Shiny package, and the accompanying local Linux server. This platform allows for efficient data discovery, download, visualization, and analysis. Data visualizations are freely available, while data storage is limited to the authorized users. In comparison with the commonly used data base tools, R-Shiny offers several advantages. As an open source package, this platform allows for constructing a web data platform in an interactive way taking into account the complexity and diversity of the data. The flexibility of this routine enables to make an efficient user-demand data portal rather than relying on predetermined outputs. It also offers flexibility in data handling by using many different R packages, rendering versatile and extensive functionalities. R-Shiny is particularly powerful in terms of statistical analyses. Although the Chicken Creek online data portal is complete and available, new features, and extended capabilities are under active development. The Chicken Creek data portal provides a comprehensive and reliable database to give scientists a fast and easy access to all collected data. Consequently, R-Shiny offers a great potential for future development of the web-based data portals to efficiently handle scientific data collected at different scales. Y1 - 2019 UR - https://meetingorganizer.copernicus.org/EGU2019/EGU2019-3270.pdf VL - 21 ER - TY - CHAP A1 - Schaaf, Wolfgang A1 - Pohle, Ina A1 - Maurer, Thomas A1 - Gerwin, Werner A1 - Hinz, Christoph A1 - Badorreck, Annika T1 - Water balance dynamics of the constructed Chicken Creek catchment as influenced by 12 years of ecological development T2 - European Geosciences Union, General Assembly 2018, Vienna, Austria N2 - Experimental catchments with well-known boundaries and characteristics may contribute valuable data to hydrological, critical zone and landscape evolution research. One of the most well-established and largest constructed catchments is the Chicken Creek catchment (6 ha area including a 0.4 ha pond, Brandenburg, Germany) representing an initial ecosystem undergoing a highly dynamic ecological development starting from clearly defined starting conditions. The water balance dynamics of the catchment was calculated using a simple mass balance approach to reveal the impact of ecological development during 12 years. Water storage in the catchment was calculated from a 3D-model of groundwater volumes, soil moisture measurements and water level recordings of the pond. The catchment water balance equation was resolved for evapotranspiration, the only part that was not measured directly. Due to the known boundary conditions and the inner structure of the catchment, we were able to quantify the different storage compartments and their role in hydrologic response. Our results indicate that for small catchments with a highly dynamic ecological development like the Chicken Creek, the knowledge about saturated and unsaturated storage volumes enables a good estimate and closure of the water balance using a rather simple approach, at least in annual resolution. We found a significant relationship between vegetation cover in the catchment and calculated ET. Time series of meteorological, hydrological, soil and vegetation data over 12 years enabled us to characterize the transient development of the catchment and to evaluate the effect of different feedback mechanisms on catchment hydrology. The dataset from the Chicken Creek catchment indicate at least three phases in ecosystem development, where initial abiotic feedbacks (e.g. erosion) were followed by more and more biotic controls (e.g. biological soil crusts, vegetation succession and growth). Data from Chicken Creek in high spatial and temporal resolution provide a valuable database underlining the high importance of abiotic/biotic feedback effects that change the hydrologic functioning and response of the catchment more than the water balance itself revealed and thus have to be included in catchment models. Y1 - 2018 UR - https://meetingorganizer.copernicus.org/EGU2018/EGU2018-11977.pdf N1 - EGU2018-11977 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - CHAP A1 - Schaaf, Wolfgang A1 - Hinz, Christoph A1 - Gerwin, Werner A1 - Zaplata, Markus Klemens A1 - Hüttl, Reinhard F. ED - Liu, Jiu-Fu ED - Gu, Wei-Zu T1 - Ecosystem Development in the Constructed Catchment "Chicken Creek" T2 - Hydrology of Artificial and Controlled Experiments N2 - Landscapes and ecosystems are complex systems with many feedback mechanisms acting between the various abiotic and biotic components. The knowledge about these interacting processes is mainly derived from mature ecosystems. The initial development of ecosystem complexity may involve state transitions following catastrophic shifts, disturbances, or transgression of thresholds. We propose a conceptual framework of feedback processes in early states of ecosystem development affected by spatiotemporal environmental drivers. To test this concept, we used 10-year time series of hydrological, biological, geomorphological, and soil data from the constructed catchment Chicken Creek.” The 6ha site was left to unrestricted development since 2005 and was intensively monitored. The data showed a very rapid development of the site with an increasing complexity and heterogeneity. In the first years, stochastic signals like the initial substrate conditions and external drivers like extreme weather events were the most important factors resulting in abiotic/abiotic feedback mechanisms shaping the morphology of the site and creating site diversity. Initial abiotic feedback mechanisms between water and substrate were soon followed by abiotic/biotic feedbacks between biological soil crusts, invading vegetation, geomorphology, and hydrology resulting in state transitions of catchment functioning. Y1 - 2018 UR - https://www.intechopen.com/books/hydrology-of-artificial-and-controlled-experiments/ecosystem-development-in-the-constructed-catchment-chicken-creek- SN - 978-1-78923-559-3 SN - 978-1-78923-558-6 SP - 75 EP - 93 PB - Intech Open CY - London ER -