Top Themes

ALAN Conference Series

ALAN 5 will take place from the 12.-14. Nov. in Snowbird, Utah, US.

Night Sky Data to the People!

A new website presents citizen science data

Touring Exhibition

Our touring exhibition with 15 posters can be borrowed for events!

'Loss of the Night' App

The 'Loss of the Night' app measures sky brightness! Take part in a world-wide citizen science project that measures star visibility and light pollution. The app is free!

City Night Time Lapse

This growing collection of time lapse videos of nights in urban centres provides insights how city lights change throughout the course of the night

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Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB)


The IGB is based in Berlin Friedrichshagen, and is one of Germany's centres for ecosystem research on limnic systems. It is Europe's only scientific research institute which unites hydrologists, chemists, microbiologists, limnologists, fish ecologists and fishing biologists for the purposes of ecosystem analysis. These analyses are primarily based on the processes (functions) and respective structures of ecosystems and secondarily on regional sites, which show specific structures and functions very clearly, for instance turbulence as a distinctive environmental variable for Berlin's shallow rivers and lakes. The IGB's work is a combination of fundamental and precautionary research as a basis for sustainable management of aquatic ecosystems.

Under the leadership of PD Dr. Franz Hölker, the IGB coordinates the research project "Loss of the Night".

The IGB is involved in the following subprojects:

SP01 Quantification of light pollution
SP02 Characzerisation of night-sky brightness
SP05 Costs of the loss of the night
SP08 Effects of light pollution on obligatory nocturnal mammals (bats)
SP09 Impact of light pollution on fish
SP10 Consequences of artificial light for mosquitoes and midges
SP13 Development of an integrative model