Although freshwaters cover less than one per cent of the earth’s surface, they are some of the most species-rich habitats on our planet – so far at any rate. After all, rivers and lakes are experiencing a rapid decline in biological diversity. And yet it is still unclear what this loss means for our well-being in the long term. One important objective of our research is therefore to identify measures that enable us to protect the biodiversity of our freshwaters as effectively as possible. We investigate the causes, draw up forecasts relating to changes, and pool our expertise in biodiversity research and in knowledge-based environmental protection. Collaborating with international partners, we also collect global data on biodiversity in freshwaters, creating a unique foundation to ensure their protection.

Selected publications

December 2024
Proceedings of the National Academy of Sciences of the United States of America. - 121(2024)38, Art. e2402980121

Rapid growth and the evolution of complete metamorphosis in insects

Christin Manthey; C. Jessica E. Metcalf; Michael T. Monaghan; Ulrich K. Steiner; Jens Rolff

Insects undergo complete metamorphosis, rebuilding their bodies, such as the transition from caterpillar to chrysalis to butterfly. The authors wondered why this extreme lifestyle might have evolved. Combining growth data and mathematical modelling, they found that insects grow much faster if they can grow and build the adult body in two separate stages, rather than doing both continuously. 

Neobiota
November 2024
NeoBiota. - XX(2024)X, XX-XX

Differential survival and feeding rates of three commonly traded gastropods across salinities

Elisabeth Renk; James W. E. Dickey; Ross N. Cuthbert; Elžbieta Kazanavičiūtė; Elizabeta Briski

This study investigates the establishment and impact risks posed by three readily available, traded snail species – Melanoides tuberculata, Tarebia granifera and Anentome helena – by assessing their survival and feeding responses across a spectrum of salinity levels.

People_and_Nature
November 2024
People and Nature. - 6(2024)5, 2091-2108

The frequent five: Insights from interviews with urban wildlife professionals in Germany

Simon S. Moesch; Jonathan M. Jeschke; Sophie Lokatis; Geva Peerenboom; Stephanie Kramer-Schadt; Tanja M. Straka; Dagmar Haase

The authors interviewed 36 urban wildlife professionals in 4 large cities in Germany. Red foxes, wild boars, raccoons, stone martens and Eurasian beavers were the five mammal species most frequently highlighted in interviews to cause human-wildlife conflicts. The interviewees emphasized the need to create refuges for beavers and better inform the public about foxes.

November 2024
Ecological Indicators. - 166(2024), 112404

A modelling approach to assess climate change impacts on taxonomic and functional diversity of European stream macroinvertebrates: Implications for water quality monitoring

Francesco Polazzo; Sami Domisch; Martina Flörke; Andreu Rico

The authors used bioclimatic models to predict EU freshwater macroinvertebrate habitats. The future distribution of macroinvertebrates reveals significant regional variations. Functional diversity was projected to change less than taxonomic diversity. Changes in environmentally suitable areas will impact widely used biological indices. 

September 2024
Biological Reviews. - 99(2024)4, 1141-1163

Freshwater megafauna shape ecosystems and facilitate restoration

Fengzhi He, Jens-Christian Svenning, Xing Chen, Klement Tockner, Tobias Kuemmerle, Elizabeth le Roux, Marcos Moleón, Jörn Gessner, Sonja C. Jähnig

This is a review, synthesizing how megafauna shape ecological processes in freshwater ecosystems and discussing their potential for enhancing ecosystem restoration. Restoring freshwater megafauna can revive essential ecological processes like disturbances, trophic cascades, and species dispersal, boosting biodiversity and enhancing nature's contributions to people.

Related Projects

Contact persons
Martin Pusch
Christian Wolter
Sonja Jähnig
Thomas Mehner
Department(s)
(Dept. 1) Ecohydrology and Biogeochemistry
(Dept. 2) Community and Ecosystem Ecology
(Dept. 3) Plankton and Microbial Ecology
(Dept. 4) Fish Biology, Fisheries and Aquaculture
(Dept. 5) Evolutionary and Integrative Ecology
Start
02/2023
End
04/2026
Topic

Related Downloads

Outlines | IGB Dossier: Small standing water bodies as biodiversity hotspots – particularly valuable, but highly endangered

Small standing waters are overlooked and underestimated because of their small size – yet they account for more than 30 percent of the world's inland water bodies and are of great ecological and social importance. In order to raise awareness of this problem and to point out options for action for policymakers, authorities and the civil society, IGB has published an IGB Dossier on this important type of water body. 

Experts at IGB

Sami Domisch

Research Group Leader
Research group
Global Freshwater Biodiversity, Biogeography and Conservation

Lynn Govaert

Research Group Leader
Research group
Eco-Evolutionary Dynamics

Sonja Jähnig

Head of Department
Research group
Aquatic Ecogeography

Matthias Stöck

Research Group Leader
Research group
Genetics and Evolution of Fish (and other Vertebrates)