GfÖ Session 2014 Current topics in ecosystem science: Acclimation and adaptation of plant traits in changing climate Short title: Plant acclimation and adaptations Tamir Klein, Yann Vitasse, Günter Hoch Institute of Botany, University of Basel, Basel, Switzerland Schönbeinstrasse 6, 4056 Basel, Tel. 061-2673506 Plants are able to adjust their physiology to face changing climatic conditions at a given site. These adjustments might be fast and reversible via acclimatization processes or slow and durable via genetic adaptations. The extent to which specific plant traits are phenotypically plastic or genotypically fixed is thus key to predict how fast plants and ecosystems can react to ongoing and future climate change. In species with long generation times, and considering the current rate of environmental change, acclimation and plasticity can make the difference between life and death of entire plant populations. Similarly with climate change over time, plants show also adjustments (variations) of functional traits along natural climatic gradients. These variations result from genetic differentiation among populations (adaptation), phenotypic response to the environmental changes (acclimation) and the interaction of both. Over the last decades an increasing number of studies addressed the ability of plants to acclimatize and adapt to environmental changes with different approaches, including the investigation of natural climatic gradients, transplant experiments or common garden trials. Within this session we welcome contributions from studies that aim to disentangle phenotypic acclimation from genotypic adaptation in functional plant traits that are responsive to climatic changes. We especially encourage presentations of studies combining measurements of the variation of plant functional traits with genotyping. Potential speakers: Antoine Kremer, INRA Bordeaux Tim Paape, University of Zürich Emily Moran, ETH Zürich Salix herbacea - Sinergia group (especially PhD's: Julia Wheeler, Janosch Seldaceck, Andres Cortes) Felix Guggerli, WSL Jürgen Kreyling's group, University of Bayreuth Oliver Bossdorf, University of Tübingen Armando Lenz, University of Basel