Riederer, M*; Hübner, J; Kuzyakov, Y; Foken, T: Investigation of carbon turnover in grasslands in Northern Bavarian low mountain ranges under extreme climate conditions
Poster, BayCEER Workshop 2010, Bayreuth: 2010-04-15

Grassland in low mountain ranges is increasingly considered as important carbon storage. The behaviour of this storage as well as carbon fluxes between atmosphere, biosphere and soil are to be investigated under extreme weather conditions. For example spring droughts, which are indicated by long time climate measurements at our site, strongly influence plant growth at the beginning of the growing season. FORKAST project serves the evaluation of climatic impacts on ecosystems and adaptation strategies. Subproject TP5 concentrates on a better understanding of organic matter input into the soil by green plants and on evaluating the prospects of grassland carbon sequestration. Micrometeorological flux measurement techniques (eddy covariance and hyperbolic relaxed eddy accumulation) and tracing of the 13C transport in plant and soil, based on 13C pulse labelling, help to achieve these objectives. Afterwards comparison of the different approaches and extrapolation of the results on other grassland sites is intended. We expect changes in photosynthetic activity and modified assimilate translocation characteristics from the leaves into roots and soil. Detailed information about the reaction of different plant species allows evaluating stability and resilience of species composition in grasslands, under the influence of extreme climate conditions. After all, adequate adaptation strategies are to be developed.

last modified 2010-10-21