Beaver reintroduction improves peatland water storage and drought resilience

A University of Liverpool study reveals beavers may aid peatland restoration by enhancing water storage and drought resilience through their natural dam-building behavior. The research, conducted in collaboration with Cheshire Wildlife Trust, analyzed the environmental effects of an enclosed beaver reintroduction in the area. Published in Hydrological Processes, the findings underscore the potential for beavers to serve as a nature-based solution to combat habitat degradation and climate change.

Peatlands, crucial for carbon storage and wildlife habitat, have been degraded by historic drainage, rendering them more susceptible to drought and reducing carbon absorption capacity. The study focused on Eurasian beavers Willow and Rowan, introduced to a 4.5-hectare enclosure in 2020 near Hatch Mere, a Site of Special Scientific Interest in Cheshire.

Since their arrival, beavers have altered the landscape by building dams, blocking drainage, and slowing water flow. Water levels in the enclosure surged up to 37 times, while pond levels tripled, and surface-water levels increased by a median of 50 centimeters. During the 2022 drought, water levels stayed above pre-beaver levels, surpassing declines at adjacent wetlands without beavers.

The study highlights beavers' role in maintaining wetter conditions, crucial for healthy peatland ecosystems, and their contribution to drought resilience as climate change intensifies extreme weather events.