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Relevancy: 100%
FOR 562 TP 6: Response of N turnover, DOC production and soil solution fluxes (Project)
Forest and fen soils are frequently subjected to extended drought periods or to lowering of water table during summer. Many biological and chemical processes in soils are affected by water and oxygen availability, but little is known about the consequences of increasing drought periods on annual matter fluxes for these ecosystems. Here, we quantify and evaluate the effects of changes in...
Funding period: 2008 - 2011
Relevancy: 100%
FOR 562 TP 10: Response of flow systems in soils (Project)
Moisture and flow patterns are of utmost importance for matter transport and spatial distribution of nutrients and pollutants in the soil compartment of ecosystems. Soil structure, spatial variation of nonlinear material functions, and dynamics of upper boundary conditions are key factors of flow path formation. In forest soils, organic O – horizons, wettability and stones seem to play a...
Funding period: 2008 - 2011
Relevancy: 100%
FOR 562 TP 5: Quantification and process analysis of biogenic trace gas fluxes (Project)
Climate models predict prolonged drought periods and extreme rain events for major parts of Central Europe. Biological and chemical processes in soils are affected by the accompanying changes in water and oxygen availability. However, little is known about the effects of extreme meteorological conditions on the annual matter fluxes on ecosystem level. The overall goal of this project is to...
Funding period: 2008 - 2011
Relevancy: 100%
FOR 562 TP 7: Processes of soil organic matter transformation during extreme drying/wetting assessed by compound-specific isotope approaches (Project)
Recently, intensive droughts followed by heavy rainfall can already be observed in Europe as proposed by climate models. Shifts in amount, intensity and frequency of precipitation could change soil structure and soil organic matter quality and thus turnover in temperate forest ecosystems. Contradicting results have been reported from drying and wetting experiments in field and laboratory studies...
Funding period: 2008 - 2011
Relevancy: 100%
FOR 562 TP Z: Operation of the central experimental sites (Project)
The goals of project „Z Central Experiments” are i) operation of the central experiments of the Research Unit 562 for the manipulation of soil water content and irrigation regime, ii) measurements of basic parameters used by the members of the Research Unit (temperatures, soil water contents, chemistry of soil solution, above ground litterfall, groundwater level) and iii) documentation of data in...
Funding period: 2008 - 2011
Relevancy: 100%
FOR 562 TP 2: Microbial cycling of iron in acidic fens (Project)
The manipulation experiments of 2006 and 2007 indicated that increased peat aeration at the fen Schlöppnerbrunnen did not eliminate the critical mechanism restricting the re-release of CO2 to the atmosphere as predicted by the enzymic latch hypothesis. However, manipulation renewaled the pool of alternative electron acceptors and shifted the electron flow from CH4 formation to alternative...
Funding period: 2008 - 2011
Relevancy: 100%
FOR 562 TP 9: Growth and vitality of fine roots of Norway spruce as influenced by experimental and natural drought (Project)
Norway spruce is one of the two economically most important tree species of Central Europe. However, this species is known to be particularly drought-sensitive and, thus, is possibly threatened by a higher frequency of summer droughts under a changing climate. Based on the results obtained in a drought experiment in the first phase of the Research Group, this project investigates the dependency...
Funding period: 2008 - 2011
Relevancy: 100%
FOR 562 TP 1: Response of belowground carbon, sulphur, and iron cycling in fen soils (Project)
Climate models predict increases in summer drought and intensive rainfalls in temperate and northern latitudes, which may alter the hydrologic and redox regime of wetlands, the single most important terrestrial carbon storage. The impact of drying and rewetting and potential inundation on ecosystem production and belowground carbon cycling and the coupling with redox processes, in particular of...
Funding period: 2008 - 2011
Relevancy: 100%
In vivo studies in cattle to the pathogen-specific immune response to toxins of different mastitis pathogens (Project)
keine Angaben
Funding period: 2005 - 2010
Relevancy: 100%
Mastitis compartment model for analysis of the initial pathogen-host contact in the distal mammary glands (Project)
keine Angaben
Funding period: 2005 - 2010
