Rhizosphere interactions in forests (2019)
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)
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)