Estuaries

Latest news

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.
Environmental monitoring technician Patrick Butler has spent hours travelling between the upper and lower reaches of Canterbury’s Waimakariri and Hurunui Rivers. His mission – river water quality sampling.
How much is too much? Susan Pepperell looks at some of the tough decisions looming around access to freshwater and how science is helping with solutions.
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.

Our work

NIWA is looking for people who have had a long association with the Hauraki Gulf or Marlborough Sounds to help them with a research project on juvenile fish habitats.
Maniapoto Māori Trust Board and NIWA worked collaboratively during 2018-19 to support Ngāti Maniapoto whānau to reconnect with and participate in the assessment of their freshwater according to their values.
NIWA has developed an Urban Stormwater Contaminant (USC) model to enable urban planners to predict sedimentation and heavy metal accumulation in estuaries and identify problem areas in order to target mitigation measures.
Excessive nutrient input (eutrophication) threatens many New Zealand estuaries causing ecological problems, such as algal blooms and poor physical and chemical conditions for estuarine life.

Latest videos

The world's most mysterious fish

A video about The world's most mysterious fish. NIWA researchers are working with iwi to try to unlock the secrets of New Zealand tuna—freshwater eels. Every year tiny, glass eels wash in on the tide at river mouths along our coast. But where do they come from and how do they get there?

 

Welcome to the latest edition of Coasts Update. Here we bring you news of some of NIWA's latest research on aspects of coastal ecology, and the possible impacts of climate change on one of our coastal communities.

Many of New Zealand's rivers fail to meet national guidelines for nutrient levels. NIWA has developed the Catchment Land Use & Environmental Sustainability (CLUES) estuary tool to predict the effects of land use on estuarine nutrient concentrations.

In the past half century, mangroves have increased in extent in estuaries and tidal creeks throughout the upper half of the North Island.

 

One method of promoting the repopulation of declining shellfish beds is to reseed them with adults of the target species collected from other areas. Reintroducing adult shellfish is labour intensive but will, if successful, encourage juveniles to recruit to declining areas and replenish them to historic levels.

Estuarine restoration research is relatively new in New Zealand and has been largely instigated by community groups that have become increasingly concerned with the decline of plant and animal species.

NIWA scientists are in the pink! They’re studying the deep candy pink or purple coralline algae, abundant around the New Zealand shoreline and throughout the world, which play a vital role in marine ecosystems.

NIWA and the Bluff Oyster Management Company have just completed a pre-season survey of the oyster beds in Foveaux Strait.

When deployed underwater, this self-contained instrument records and analyses water waves. It can trigger other instruments and send alarms via a communications link.

NIWA has developed an Urban Stormwater Contaminant (USC) model to enable urban planners to predict sedimentation and heavy metal accumulation in estuaries and identify problem areas in order to target mitigation measures.

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All staff working on this subject

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Principal Technician - Marine Ecology
Principal Scientist - Ecosystem Modelling
Principal Scientist - Marine Ecology
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Freshwater Hydro-Ecologist
Manager - Coasts and Oceans
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Principal Scientist - Marine Ecology
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Principal Scientist - Marine Ecology
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Coastal and Estuarine Physical Processes Scientist
Principal Scientist - Coastal and Estuarine Physical Processes
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Coastal Technician
Freshwater Fish Ecologist
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Marine Ecology Technician
Hydrodynamics Scientist
Resource Management Scientist
Regional Manager - Auckland
Maori Organisational Development Manager
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