(Dept. 2) Community and Ecosystem Ecology

Inland waters support exceptional biodiversity, are characterised by intense metabolism of matter, and provide important ecosystem services. However, freshwater ecosystems face high and increasing pressures from multiple stressors. The Department of Community and Ecosystem Ecology conducts research in both standing and running waters studying the response of freshwater communities and ecosystems to global change. Ultimately, we aim to advance our mechanistic understanding of the structure and functioning of inland waters as a basis for their sustainable management. Specifically, we focus on:

  • Response of freshwater communities and diversity to changing environments
  • Interactions between freshwater communities, their environment and ecosystem functioning
  • Spatial and temporal freshwater biodiversity patterns
  • Sustainable management of freshwater communities and ecosystems

We develop and analyse the long-term monitoring data of Lake Müggelsee and Spree as well as from other inland waters and their catchments, employ spatially explicit statistical and deterministic modelling approaches, and conduct lab and field experiments. Our department additionally encompasses research on the global effects of climate change and biodiversity and develops new theoretical concepts on that.

Contact persons

Sonja Jähnig

Head of Department
Research group
Aquatic Ecogeography

Department members

Selected publications

Nature_Ecology&Evolution
May 2024
Nature Ecology & Evolution. - 8(2024), 1098-1108

Inland navigation and land use interact to impact European freshwater biodiversity

Aaron N. Sexton, Jean-Nicolas Beisel, Cybill Staentzel, Christian Wolter, Evelyne Tales, Jérôme Belliard, Anthonie D. Buijse, Vanesa Martínez Fernández, Karl M. Wantzen, Sonja C. Jähnig, Carlos Garcia de Leaniz, Astrid Schmidt-Kloiber, Peter Haase, Marie Anne Eurie Forio, Gait Archambaud, Jean-François Fruget, Alain Dohet, Vesela Evtimova, Zoltán Csabai, Mathieu Floury, Peter Goethals, Gábor Várbiró, Miguel Cañedo-Argüelles, Aitor Larrañaga, Anthony Maire, Ralf B. Schäfer, James S. Sinclair, Rudy Vannevel, Ellen A. R. Welti & Alienor Jeliazkov

Using a comprehensive set of long-term data, the authors show that shipping has contributed to a significant loss of biodiversity of fish and macroinvertebrates in European rivers in recent decades – and that the animal communities are becoming increasingly homogeneous and river-typical species are being lost. Invasive species, on the other hand, are significantly increasing. 

People_and_Nature
May 2024
People and Nature. - 6(2024)2, 435-445

The potential of citizen science to transform science: Lessons for a sustainable future

K. Austen; A. Janssen; J. M. Wittmayer; F. Hölker

The authors analysed 8 citizen science projects within Accelerator Programme of the EU H2020 funded ACTION project that deal with environmental pollution. Citizen science involves the public in the scientific process, making research more relevant and responsive. Our findings show that this can lead to a more sustainable future, where science and society work together to solve pressing problems.

March 2024
Scientific Data. - 11(2024) Art. 236

Quantitative description of six fish species’ gut contents and prey abundances in the Baltic Sea (1968–1978)

Benoit Gauzens; Gregor Kalinkat; Ana Carolina Antunes; Thomas Boy; Eoin J. O’Gorman; Ute Jacob; Malte Jochum; Susanne Kortsch; Benjamin Rosenbaum; Ludmilla Figueiredo; Ulrich Brose

This data paper presents a multi-year database containing information about diets and traits for demersal fish species from the Western Baltic Sea, as well as on resource abundances and environmental conditions. These historical data are unique as they provide detailed descriptions of quantitative and trait-based consumer-resource interactions enabling various ways of innovative food-web analyses.

March 2024
Nature Climate Change. - 14(2024), 387–392

Flexible foraging behaviour increases predator vulnerability to climate change

Benoit Gauzens; Benjamin Rosenbaum; Gregor Kalinkat; Thomas Boy; Malte Jochum; Susanne Kortsch; Eoin J. O’Gorman; Ulrich Brose

Based on a combination of (historical) empirical data and model simulations the authors investigated how size-selective adaptive behaviour under warmer conditions in demersal marine fishes might affect their long-term population stability. Under warmer conditions the fish species studied tend to consume less efficiently by choosing smaller and more abundant prey increasing their extinction risk.

February 2024
WIREs Water. - X(2024)X, Art. e1717

Reviving Europe's rivers: Seven challenges in the implementation of the Nature Restoration Law to restore free-flowing rivers

Twan Stoffers; Florian Altermatt; Damiano Baldan; Olena Bilous; Florian Borgwardt; Anthonie D. Buijse; Elisabeth Bondar-Kunze; Nuria Cid; Tibor Erős; Maria Teresa Ferreira; Andrea Funk; Gertrud Haidvogl; Severin Hohensinner; Johannes Kowal; Leopold A. J. Nagelkerke; Jakob Neuburg; Tianna Peller; Stefan Schmutz; Gabriel A. Singer; Günther Unfer; Simon Vitecek; Sonja C. Jähnig; Thomas Hein

The authors identified potential challenges and ambiguities in the EU-NRL for restoring free-flowing rivers. They propose clear definitions of critical terms and the development of integrated assessment methods for prioritising actions to improve river connectivity as novel solutions to these challenges, contributing to the success of habitat restoration and biodiversity protection.

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