Current projects

New transparent soil microcosms for live assessment of competiton for nitrogen in the rhizosphere (2018-2019) – in collaboration with Lionel Dupuy (James Hutton Institute, Dundee, Scotland, UK)
Woody plant interactions (2018)
Consequences of competition and abiotic stress on the acquisition and internal allocation of nitrogen in temperate woody species (2017-2020) – in collaboration with Karin Pritsch (HelmholtzZentrum München, Germany)
Belowground functional traits of plants as drivers of biodiversity and ecosystem functions (2017-2020) – collaboration with Mark van Kleunen (University of Konstanz, Germany), Matthias Rillig (Freie Universität Berlin, Germany) in the framework of the Biodiversity Exploratories
Influence of mycorrhizae on the competition for different nitrogen sources in deciduous tree species (2017-2018) – in collaboration with Nico Eisenhauer (iDiv Leipzig, Germany)
Competition for nitrogen between woody species and invasive grasses (2016-2017)
Plant interactions in the rhizosphere of forest ecosystems (2015-2017)
Intra- and interspecific competition for different nitrogen sources in a temperate forest community (2015-2016)
Consequences of insect mass outbreaks on tree nutrition of pine trees (2014-2017) – collaboration with Anne l-M-Arnold (University of Göttingen, Germany), Heinz Rennenberg (University of Freiburg, Germany) in the framework of the working group “ENVIRUS – ENVIRonment Under Stress”
Competition for nitrogen in (sub-) tropical forests (2014-2016) – collaboration with Susanne Schmidt (University of Queensland, Australia)
Plant invasions – Competitive advantage due to higher N use efficiency or optimised acquisition strategies? (2013-2016) – collaboration with Mark van Kleunen (University of Konstanz, Germany)

Past projects

Effects of climate change on the competition for nitrogen in temperate forest ecosystems.(2011-2014)
Influence of water and nitrogen availability on the competition between European beech and sycamore maple for soil nitrogen sources. (2010-2014)
Competitive patterns of N partitioning between plants and microorganisms in intact plant-soil-systems. (2010-2013)
The significance of NO and CO2 as signal substances in the competition for nitrogen between beech and soil microorganisms. (2009-2014)
Root N uptake of wheat cultivars in AGFACE(2011-2012) – collaboration with Michael Tausz (University of Melbourne, Australia), Heinz Rennenberg (University of Freiburg, Germany)
Identification of drought-tolerant beech proveniences using molecular genetic and physiological markers (2013-2014) – collaboration with Aikaterini Dounavi (FVA Freiburg, Germany), Heinz Rennenberg (University of Freiburg, Germany)
Influence of phenolic compounds on tree herbivory by the beaver in different tree species. (2011-2013) – collaboration with Thomas Kaphegyi (University of Freiburg, Germany)
N uptake in degraded forest ecosystems in the Qinling mountains. (2011-2012) – collaboration with Shuoxin Zhang (Northwest A&F University Yangling, China), Klaus Butterbach-Bahl (Karlsruhe Institute of Technology, Germany), Heinz Rennenberg (University of Freiburg, Germany)
Influences of air warming and / or drought on different oak species and provenances. (2009-2012)
Effects of drought stress on nitrogen uptake and metabolism in European beech. (2008-2012)
The significance of N uptake and metabolism by beech roots for the competition for N in the rhizosphere. (2006-2009)