Freshwater

The invasive gold clam (Corbicula fluminea) can reach very high population densities, which can harm freshwater ecosystems.

A team of NIWA freshwater ecologists have completed their research on the use of biodegradable plant mats as life rafts to help reintroduce native aquatic plants to degraded freshwater lakes.

NIWA scientists have launched a groundbreaking initiative that is transforming mapping of freshwater environments.

Could bubbles and strobe lights stop pest fish swimming where they’re not wanted?

Learn more about gold clam life cycle

NIWA scientists are gathering data on freshwater mitigation across NZ to improve predictive models.

The invasive gold clam is native to eastern Asia and is widely established in North and South America and Europe. In New Zealand it was first discovered in the Waikato River in May 2023 at Bob's Landing, within Lake Karāpiro. It has been declared an unwanted organism under the Biosecurity Act.

NIWA and partners launch critical research to stop an invasive clam threatening New Zealand's freshwater ecosystem.

Introducing NIWA environmental engineer Reza Moghaddam.

Introducing NIWA sediment transport scientist Clare Wilkinson.

A short-lived, strikingly stunning native mayfly known to fly-fishers and aquatic admirers yet seldom seen by the public may have its time in the spotlight this month as a nominee for the 2025 New Zealand Bug of the Year.

A team of NIWA freshwater ecologists are researching the use of biodegradable plant mats to help reintroduce native aquatic plants to degraded freshwater lakes in Aotearoa-New Zealand.