Rnz: Our Changing World

Kākahi are a keystone species in lake and river ecosystems, keeping the water clean by filtering one litre of water every hour. These native mussels once blanketed lakebeds across Auckland – but recent surveys found an alarming decline and disappearance across many lakes. A team of scientists and divers have mounted a rescue mission for one of the last remaining kākahi populations, trying to keep the mussels safe from invasive fish through all the steps of their complicated – and fascinating – life cycle. Guests:Madison Jones, Senior Healthy Waters Specialist, Auckland CouncilBelinda Studholme, Senior Biosecurity Advisor – Freshwater, Auckland CouncilEbi Hussain, Submerged Environmental and Aotearoa LakesAndrew Simpson, Global DiveLearn more:Read the article that accompanies this episode: A rescue mission saving rare freshwater mussels.Meet the bullies – the native freshwater fish that host the kākahi in their parasitic stage – in this 2023 episode recorded by Claire at Zealandia, where the fish have been tra