Facebook post by University of Helsinki

Beavers are extraordinary ecosystem engineers. 🤩 Petri Nummi studies how they impact wetland ecosystems. Armed with strong teeth and remarkable engineering skills, beavers fell trees and build sophisticated dams out of them. 🌲🛠 So they cause flooding and a consequent abundance of deadwood. How do such profound alterations shape the landscape and its animal community over time? The Evo area, in southern Finland, is the ideal place to investigate this. It’s a boreal network of lakes, wetlands and forest, and a historically active research hotspot. Truly a paradise for hikers and scientists too! 🏕🔍🌲 University lecturer Petri Nummi has monitored the American beaver in Evo’s watershed since the 1970s. He has kept track of changes to the environment and its inhabitants. Petri took us to a former beaver lake, complete with abandoned lodge, to see what species of water birds were to be found. 🦆🦢 However, Nummi’s surveys have included other species too — ranging from insects to frogs, bats and moose. His long-term research has shown that beaver engineering widely supports local biodiversity by providing food and shelter. The impact of beavers on wetlands reminds us of the crucial role a single species can play in the creation and dynamics of an ecosystem. Understanding these dynamics is one important step towards effective nature protection. 💚 Want to read more about these amazing ecosystem engineers? ➡️ https://www2.helsinki.fi/en/news/life-science/teal-ducklings-go-cuckoo-over-natures-own-eco-engineer?utm_source=facebook&utm_medium=social_owned Kentällä - In the field Lammi Biological Station