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.

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What swims in the Lake Müggelsee?

Which fish species live in the Lake Müggelsee, how many of them are there, and how big do they get? These were the questions investigated by some 20 IGB employees between 8 and 10 October.
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Light pollution a reason for insect decline!?

Climate change, pesticides and land use changes alone cannot fully explain the decline in insect populations in Germany. Artificial lighting at night could be another reason for declining insect populations.

Related Projects


The DASTMAP project develops and applies new genetic markers to characterize four in the Danube River endangered sturgeon species as a prerequisite for sustainable fisheries and conservation management.
Contact person
Klaus Kohlmann
(Dept. 4) Biology and Ecology of Fishes
(Dept. 5) Ecophysiology and Aquaculture


Connectivity and synchronisation of lake ecosystems in space and time
Contact person
Stella A. Berger
Sabine Wollrab
(Dept. 1) Ecohydrology
(Dept. 3) Experimental Limnology

Related Downloads

Experts at IGB

Jörg Freyhof

Project Coordinator
Working group
River Revitalization

Sonja Jähnig

Research Group Leader
Working group
Global Change Effects on River Ecosystems

Matthias Stöck

Research Group Leader
Working group
Evolutionary Biology and Ecotoxicology of Amphibians and Fish

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