Ellen J. Dolan

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Weirs and dams act as barriers within river ecosystems – removing them affects how aquatic wildlife and invasive species move. Bardhok Ndoji/Shutterstock

River wildlife moves freely once dams are removed – but so too can invasive species

Ellen J. Dolan, Queen's University Belfast; Jaimie Dick, Queen's University Belfast, and Ross Cuthbert, Queen's University Belfast

The natural connectivity of rivers acts like a highway, helping invasive species spread rapidly throughout a catchment.

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