Large dams may threaten survival of platypus populations, research finds

Researchers have found DNA from platypus populations above and below major dams is greatly differentiated, suggesting dams are preventing genetic mixing. Photograph: AAP/North Central Catchment Management Authority

Major dams have disrupted gene flow between platypus populations, making them more vulnerable to threats, according to new research.

Scientists from the University of New South Wales examined the genetic makeup of platypuses in free-flowing and dammed rivers in that state.