KNOWLEDGE BASE

This study tested the impact of Eurasian beavers browsing on willow plants in winter. They simulated beaver browsing by pruning willow shrubs in February and comparing the shoots with those of shrubs that had not been pruned. The new shoots were tested in May and November. In May, pruned shoots were more nutritious and were preferred by beavers. In November, there was no difference in nutrition nor in beaver preference. This suggests that, after browsing, willows prioritise regrowth rather than any type of defense mechanism.

Researchers explored how wood frog populations respond to different types of beaver pond in Canada. They found that older beaver ponds hosted more male frogs, likely because they had less tree cover, warmer water, and higher oxygen levels. Protecting beavers and their habitats could help maintain healthy amphibian populations in the high-latitude pine forests. Please note, this resource is not open-access.

Between 2002 and 2004, feces from 62 beavers in the USA were tested for certain parasite species using microscopy and genetic analysis. The study showed that 6.4% of the beavers, all young ones, had these parasites.

Mammals use scent to mark their territory but this can attract predators. In this experiment, scientists looked at how beavers reacted to intruders, by planting scents of predator and non-predator animals. They found that both predator and non-predator scents reduced beavers' scent-marking activity but the predator scent had a stronger effect. This suggests beavers living in territories with predators may be more vulnerable as there is a trade-off between avoiding predators and defending territory.

This book explores the history of Eurasian beavers in Britain, from the last ice age until their historic extinction. It combines ecology, archaeology, and history, discussing the beaver's habitats, ecological impact, and interactions with humans. The book looks at archaeological evidence and historical records and argues that humans at one point relied a lot on, and learned a lot from, beaver activity! Please note, this resource is not open-access.