Our research

A fundamental understanding of tree responses to environmental cues is necessary to address climate change impacts. Forests critically influence the Earth's climate and cycle large quantities of carbon and water, yet trees are increasingly at risk through an amplification of extreme climatic events.

We address tree and forest resilience to climate change and extreme climatic events, in particular heat and drought stress. Our research provides process knowledge to predict and guide the potential of forests in mitigating climate change. We combine controlled experiments, observational studies and ecosystem modelling approaches. We teach undergraduate and graduate students in process-based ecological research, as well as provide knowledge transfer into schools and society.

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Group members in front of the greenhouse after tidying up

 Prof. Dr. Nadine Rühr doing experiments in the greenhouse at IMK-IFU

The greenhouse at KIT-Campus Alpin in front of the Alpspitze

Biomass samples in front of the IMK-IFU greenhouse

PhD student measuring chlorophyll content during a hot drought stress experiment in the greenhouse at IMK-IFU

Two people working in the lab at IMK-IFU

Winter trees in front of the greenhouse at IMK-IFU

PhD student examines the experimental trees in the greenhouse at IMK-IFU


News

Marielle and Nadine after successful defenseNadine Rühr, KIT
Congratulations, Marielle!

February, 2025: Marielle defended her PhD thesis on "Effects of drought and elevated CO2 on growth and mortality of pine trees” with great success. Congratulations!

Working group at the SchneefernerhausNadine Rühr, KIT
Group retreat at Schneefernerhaus

In February 2025, our working group held a two-day retreat at the Schneefernerhaus on the Zugspitze. In the midst of an impressive landscape, we had an intensive exchange about our current and future research, with a focus on optimizing internal group work structures. Inspired and motivated, we bring new perspectives back to our everyday work.

Dead tree in forestMarkus Breig, KIT
Understanding global tree mortality

Tree mortality is rising worldwide, yet patterns and causes remain unclear. A study of nearly 467,000 forest plots highlights progress in monitoring but also data gaps. Integrating ground inventories with remote sensing could help, but requires technical solutions and fair data sharing. The study published in New Phytologist highlights that a truly global system must ensure equitable collaboration and empower scientists from less wealthy regions.

 

Collaborations

Trees in the foothills of the Alps Gabi Zachmann, KIT
Forests in a warmer world

Forests ecosystems are critical for climate regulation, land biodiversity, for providing fresh water, timber and non-timber products, and also for human well-being and security.

What we do - simply explained
Measuring instruments on a meadow in the foothills of the Alps Markus Breig, KIT
Institute of Geography and Geoecology (IFGG)
Aerial view of healthy and damaged conifers
International Tree Mortality Network

Our mission is to facilitate collaboration between scientists to combine expertise, knowledge and data...

Network for scientists