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Selective use of plant provenances – A potential tool for climate change adaptation?

Daniel Thiel1, Carl Beierkuhnlein1, Jürgen Kreyling1, Julia Gommola, Anke Jentsch2
1 Lehrstuhl Biogeografie, Universität Bayreuth
2 Juniorprofessur Störungsökologie

O 4.6 in Klimaforschung

02.04.2009, 17:30-17:45, H8

Climate Change will alter worldwide growth conditions and event regimes considerably. It is important to know how key plant-species will react to these changes in order to secure the productivity of ecosystems. Especially the identification of provenances of key species that are well adapted to future conditions is one promising approach in this context. Provenance trials are long known in forestry. However, there are only few studies focussing on non-tree or grassland species. In a first step to identify suitable provenances, 46 different origins of Arrhenatherum elatius were planted within the EVENT-Experiment. Hardly any significant differences in ANPP were found between the 46 provenances. Besides that the difference between the climatic conditions during the experimental phase in Bayreuth and the 1961-1990 mean conditions at the origin of the provenances exhibits only a minor influence on ANPP. However, classical provenance trials, especially in forestry, yield results that show huge differences in performance. The insignificant differences between the A. elatius provenances indicate either a mixing of provenances on a continental scale due to intensive farming or else it implies that a random selection of provenances is insufficient to identify origins that are adapted to certain (future) conditions. Further experiments therefore should select the provenances systematically from regions with climatic conditions similar to the projected future conditions in the target region. This will be conducted within the sub-project 1 of the research cooperation FORKAST, where systematically selected provenances of four key grass-land species and two tree species will be tested for their adaptive potential by subjecting them to drought and warming.   

Letzte Änderung 06.03.2009