Freshwater news

News and media releases related to our freshwater work.

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Scientists are seeing more toxic algae in our lakes and rivers compared to previous years, says NIWA. 
A 3D Printer is helping save New Zealand’s endangered native fish
A new NIWA study in Wellington Harbour will help scientists find untapped drinking water around the world.
About 76 per cent of indigenous freshwater fish species, that’s 39 out of 54, are threatened with extinction or at risk of becoming threatened.
Deep beneath Waitomo’s rolling hills lies a maze of caves and underground rivers. Here, NIWA researchers braved the dark waters to measure the current and hunt for fishy invaders under the twinkle of the cave’s magical glowworms.
River flows in New Zealand have changed dramatically over the past 50 to 90 years as the climate has varied, a new study has found.
Nearly half of New Zealand’s river network is partially or fully inaccessible to migratory fish, a new study shows.
New energy efficient streetlights are playing a major role in influencing insect behaviour, says NIWA.
NIWA has updated and restarted a course using a riparian planning tool developed by one of its former chief scientists more than 20 years ago.
New Zealand has just over 50 native freshwater fish species. Of these, 85 % are endemic and 75 % are deemed to be at risk of decline or are threatened.
NIWA is asking people in flood-affected areas to contribute photos to a national database to support understanding of flood hazard and flood risk.
Flood flows on the Buller River this month were the largest of any river in Aotearoa New Zealand in almost 100 years, NIWA measurements show.
A combination of artificial intelligence and scientific ingenuity looks set to be the next step forward in protecting Aotearoa New Zealand’s lakes and rivers from invasive aquatic weeds.
Preliminary analysis by NIWA climate scientists has shown that the recent Canterbury rainfall was so extreme in some inland places that it could be expected to happen only once every 200 years.
A NIWA scientist is asking for the help of skiers, mountaineers and alpine professionals to collect snow for a new research project.
A new study has identified seven freshwater species native to Aotearoa-New Zealand that will likely be highly or very highly vulnerable to climate change.
For more than 20 years NIWA scientists have been nurturing three plants that are the only examples of their kind in existence.
Scientists know so little about how storms affect the delicate balance of lake ecosystems that we may be unable to protect them from the effects of climate change, says a NIWA scientist.
Contraptions that resemble upside-down kitchen sinks have been placed in the Waikawa River in Southland to attract a notoriously elusive native fish species.
Under the light of the moon where the river meets the sea, NIWA researchers are planning to catch tiny fish that are all but invisible to the naked eye.

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