Science database

KNOWLEDGE BASE

We have gathered decades of scientific research from Great Britain, continental Europe and North America to share with people interested in diving deeper into the world of beavers.

This list of resources is being constantly amended and updated.

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Introduced beaver improve growth of non-native trout in Tierra del Fuego, South America

Published by: Ecology and Evolution

20th August 2020

North American beavers and brown trout do not live in the same places naturally, but both are invasive species in Chile. This study explored their interactions, finding that beavers supported trout growth by providing more food, and more diverse food at that.

Population and distribution of beavers Castor fiber and Castor canadensis in Eurasia

Published by: Mammal Review

19th August 2020

Eurasian beaver populations were reduced to ~1,200 animals, but have recovered through reintroductions and natural spread, now reaching around 1.5 million. Range expansion has been rapid, with beavers re-established in most of their former European range and parts of Siberia. Genetic studies have shown two surviving clades. Future increases in populations and impacts on freshwater systems are expected and the researchers state that beaver management should be integrated into densely populated regions.

Minding your own business: low pair cohesion in a territorial, monogamous mammal

Published by: Animal Behaviour

1st August 2020

In Norway, scientists studied Eurasian beaver pairs to understand how close they stuck together as they went about their business. This was based on GPS data from 14 pairs. The results showed they don't spend much time together, staying (on average) around 500 m apart. They stayed further apart when they were occupying a larger territory. The scientists proposed that, because beavers are monogamous, they focus more on defending their territory than they do their partner.

Environmental factors affecting the distributions of the native Eurasian beaver and the invasive North American beaver in Finland

Published by: Biological Conservation

1st August 2020

This paper compares how environmental factors (such as climate, food availability, human disturbance) influence the distribution of native Eurasian beavers and invasive North American beavers in Finland. Both had similar preferences for rivers, streams, and lakes. There are some differences between the species in the trees they preferred. The authors suspect, however, that much of the difference in habitat is due to the populations' histories i.e. they currently exist near to the places where they were successfully reintroduced.

A review of the influence of beaver Castor fiber on amphibian assemblages in the floodplains of European temperate streams and rivers

Published by: Herpetological Journal

1st July 2020

Beavers modify streams through dam building, burrowing, and tree felling. This review explored the impacts of such activity on the 19 amphibian species found in central and northern Europe. All are found in beaver ponds, making beaver ponds potentially one of the most important amphibian habitats in northern and central Europe. The article goes into much more detail, for example differentiating between their impact on big rivers versus small streams.

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