TY - CHAP A1 - Gerwin, Werner A1 - Schaaf, Wolfgang A1 - Hinz, Christoph A1 - Hüttl, Reinhard F. T1 - Monitoring of Ecosystem Development at the Constructed Catchment Chicken Creek T2 - TERENO International Conference 2014, From Observation to Prediction in Terrestrial Systems, 29 September to 2 October 2014, Book of Abstracts N2 - The constructed catchment Chicken Creek was established in 2005 as an experimental landscape laboratory for ecosystem research. The 6 ha area with clearly defined horizontal as well as vertical boundary conditions was left for an unrestricted primary succession. The developing ecosystem offers the opportunity to study most processes occurring at the interface of bio-, pedo-, geo- and hydrosphere. Particularly interactions and feedbacks between different evolving compartments as well as the establishment of ecosystem functions and services can be investigated during the ongoing ecosystem development. The catchment is extensively instrumented since 2005 in order to detect transition stages of the ecosystem. Comprehensive data recorded with a high spatial and temporal resolution include hydrological, geomorphological, pedological, limnological as well as biological parameters. This site offers the unique situation of an early stage ecosystem with highly dynamic system properties. The first years of development were characterized by a fast formation of geomorphological structures due to massive erosion processes at the initially non-vegetated surface. Hydrological processes led to the establishment of a local groundwater body within 5 years. In the following years the influence of biological structures like vegetation patterns gained an increasing importance. Feedbacks between developing vegetation and e.g. hydrological features became more and more dominant. As a result, different phases of ecosystem development could be distinguished until now. This observatory offers manifold possibilities to identify and disentangle complex interactions between ecosystem compartments in situ under natural conditions. The originally low complexity of the system is growing with time facilitating the identification of influences of newly developing structures on ecosystem functions. Thus, it is possible to study effects of small-scale processes on the whole system at the landscape scale. In addition, the highly dynamic initial system properties allow the observation of multifaceted changes of ecosystem properties and functions within short periods of time. Y1 - 2014 UR - http://www.tereno-conference2014.de/tereno-conference/EN/download_book_of_abstracts/_node.html SP - P2-12 ER - TY - CHAP A1 - Elmer, Michael A1 - Schaaf, Wolfgang A1 - Gerwin, Werner A1 - Hinz, Christoph T1 - The constructed catchment ’Chicken Creek’ – a landscape observatory to analyze processes and feedback mechanisms during initial ecosystem development T2 - European Geosciences Union, General Assembly 2014, Vienna, Austria, 27 April – 02 May 2014 N2 - We investigated the initial development of the landscape observatory ’Chicken Creek’, Germany, an artificial catchment with well known boundary conditions and inner structures (Gerwin et al., 2011). Over a period of nine years, we observed considerable changes within the site (Elmer et al., 2013). Both internal and external factors could be identified as driving forces for the formation of structures and patterns in the catchment. Over time, secondary structures and patterns evolved and became more and more important. Invading biota and vegetation succession initialized feedback mechanisms resulting in pattern and habitat formation as well as in increased differentiation, heterogeneity and complexity that are typical characteristics of ecosystems (Schaaf et al., 2013). 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. Y1 - 2014 UR - http://meetingorganizer.copernicus.org/EGU2014/EGU2014-6042.pdf N1 - EGU2014-6042-1 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - CHAP A1 - Hinz, Christoph A1 - Schaaf, Wolfgang A1 - Gerwin, Werner T1 - Competing feedbacks drive state transitions during initial catchment evolution: Examples from post-mining landscape and ecosystems evolution T2 - European Geosciences Union, General Assembly 2014, Vienna, Austria, 27 April – 02 May 2014 N2 - Within the context of severely disturbed landscapes with little or no ecological memory, such as post-mining landscapes, we propose a simple framework that explains the catchment evolution as a result of competing feedbacks influenced by the initial conditions and the atmospheric drivers such as rainfall intermittency and intensity. The first stage of the evolution is dominated by abiotic feedbacks triggered by rainfall and subsequent fluid flow causing particle mobilisation on the surface and in the subsurface leading to flow concentration or in some instances to densification of surface and subsurface substrates. Subsequently, abiotic-biotic feedbacks start to compete in the sense that biological activity generally stabilizes substrate by preventing particle mobilisation and hence contribute to converting the substrate to a habitat. We suggest that these competing feedbacks may generate alternative stable states in particular under semi-arid and arid climatic conditions, while in temperate often energy limited environments biological process “outcompete” abiotic processes leading to a stable state, in particular from the water balance point of view for comparable geomorphic situations. Y1 - 2014 UR - http://meetingorganizer.copernicus.org/EGU2014/EGU2014-12609.pdf N1 - EGU2014-12609 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - CHAP A1 - Gerwin, Werner A1 - Schaaf, Wolfgang A1 - Elmer, Michael A1 - Hinz, Christoph T1 - The constructed catchment Chicken Creek as Critical Zone Observatory under transition T2 - European Geosciences Union, General Assembly 2014, Vienna, Austria, 27 April – 02 May 2014 N2 - The constructed catchment Chicken Creek was established in 2005 as an experimental landscape laboratory for ecosystem research. The 6 ha area with clearly defined horizontal as well as vertical boundary conditions was left for an unrestricted primary succession. All Critical Zone elements are represented at this site, which allows the study of most processes occurring at the interface of bio-, pedo-, geo- and hydrosphere. It provides outstanding opportunities for investigating interactions and feedbacks between different evolving compartments during ecosystem development. The catchment is extensively instrumented since 2005 in order to detect transition stages of the ecosystem. Data recorded with a high spatial and temporal resolution include ydrological, geomorphological, pedological, limnological as well as biological parameters. Y1 - 2014 UR - http://meetingorganizer.copernicus.org/EGU2014/EGU2014-6248.pdf N1 - EGU2014-6248 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - CHAP A1 - Fischer, Thomas A1 - Veste, Maik A1 - Eisele, Andreas A1 - Bens, Oliver A1 - Spyra, Wolfgang A1 - Hüttl, Reinhard F. T1 - High resolution mapping of Normalized Difference Vegetation Indices (NDVI) of biological soil crusts T2 - EGU General Assembly 2012, held 22-27 April, 2012 in Vienna Y1 - 2012 N1 - EGU2012-7052 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - CHAP A1 - Schneider, Anna A1 - Gerke, Horst H. A1 - Maurer, Thomas A1 - Nenov, Rossen A1 - Seifert, Stefan T1 - Quantification of initial sediment redistribution in an artificially-created catchment using a time series of digital elevation models T2 - European Geosciences Union General Assembly 2011, Vienna, Austria, 03 – 08 April 2011 Y1 - 2011 UR - http://meetingorganizer.copernicus.org/EGU2011/EGU2011-4686.pdf N1 - EGU2011-4686 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - GEN A1 - Esperschütz, Jürgen A1 - Zimmermann, Claudia A1 - Dümig, Alexander A1 - Welzl, G. A1 - Buegger, Franz A1 - Elmer, Michael A1 - Munch, Jean Charles A1 - Schloter, Michael T1 - Dynamics of microbial communities during decomposition of litter from pioneering plants in initial soil ecosystems T2 - Biogeosciences Discussion Y1 - 2012 SN - 1810-6285 VL - 9 IS - 10 SP - 14981 EP - 15010 ER - TY - CHAP A1 - Schaaf, Wolfgang A1 - Biemelt, Detlef A1 - Fischer, Anton A1 - Gerwin, Werner T1 - Chicken Creek after five years: what changed? T2 - EGU General Assembly 2011, Vienna, Austria, 03 – 08 April 2011 Y1 - 2011 UR - http://meetingorganizer.copernicus.org/EGU2011/EGU2011-5755.pdf N1 - EGU2011-5755 ER - TY - CHAP A1 - Schneider, Anna A1 - Gerke, Horst H. A1 - Maurer, Thomas A1 - Nenov, Rossen A1 - Raab, Thomas T1 - Hydro-geomorphic differentiation of an artificial catchment during the initial phase of ecosystem development T2 - AGU Fall Meeting 2011, San Francisco, Calif., 5-9 Dec. 2011 Y1 - 2011 SP - H31A-1134 ER - TY - BOOK A1 - Gerwin, Werner A1 - Schillem, Steffi A1 - Asch, Folkard A1 - Bens, Oliver A1 - Bestajovsky, Jürgen A1 - Bruns, Christian A1 - Gattinger, Andreas A1 - Hattig, Tom A1 - Hoogen, Heiner A1 - Hüttl, Reinhard F. A1 - Raab, Thomas A1 - Rodionov, Andrei A1 - Schaaf, Wolfgang A1 - Schneider, Bernd Uwe A1 - Trimborn, Manfred ED - Hüttl, Reinhard F. ED - Gerwin, Werner T1 - Bodenmelioration und Anbauverfahren für trockenheitsgefährdete Standorte (BAtroS) Y1 - 2011 SN - 978-3-937728-14-8 PB - FZLB CY - Cottbus ER -