Estuaries

Latest news

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.

NIWA scientists have written a guide for managing mangroves, prompted by a desire for people to learn more about mangrove ecosystems, and what happens when they are removed.

As New Zealand's "Mr Eel", Niwa's Dr Don Jellyman has heard every tall tale. And some of them may be true.

New Zealand’s mangrove swamps and coastal marshes may be particularly adept at absorbing and storing the carbon we emit.

Our work

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 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.
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?

 

The main purpose of Ngā Waihotanga Iho is to provide tools for the public to measure environmental changes that occur in estuaries over time.
This project aims to increase our knowledge of aquatic ecosystems and their restoration, and apply this to degraded streams, rivers, lakes and estuaries.
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.
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.
To prepare for changes in climate, our freshwater and oceans decision-makers need information on species vulnerability to climate change.
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?

 

Freshwater Update 76 brings you the latest information from our Freshwater & Estuaries Centre, with articles ranging from spring and river water condition to urban waters, didymo and aquatic plant scientists.
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.

Compound Specific Stable Isotope tracing of sediment sources - tools to manage a sticky problem in New Zealand’s freshwaters and estuaries

Fine sediment is New Zealand’s most widespread water contaminant, degrading ecosystems, infilling dams and reservoirs and impairing recreational, cultural and aesthetic values in our rivers, estuaries and coastal seas.

NIWA scientists have written a guide for managing mangroves, prompted by a desire for people to learn more about mangrove ecosystems, and what happens when they are removed.

As New Zealand's "Mr Eel", Niwa's Dr Don Jellyman has heard every tall tale. And some of them may be true.

A number of individuals, organisations and hapū have contributed to the development of Ngā Waihotanga Iho.

This section outlines some practical matters you need to consider before using any of the modules.

This manual aims to provide the guidance needed to manage mangrove expansion, while maintaining the ecological integrity of estuaries and harbours.

New Zealand’s mangrove swamps and coastal marshes may be particularly adept at absorbing and storing the carbon we emit.

Once you have identified the problem, and applied the necessary tools for restoring kōura to your stream, the next phase of your project is to monitor the site to see whether restoration works.
The tools available for restoring kōura to lakes and streams depend on what is causing kōura to decline.
Habitat and biological factors factors affect why kōura rare or absent in your waterway.

Pages

 

All staff working on this subject

Environmental Research/Science Communication
Principal Scientist - Coastal and Estuarine Physical Processes
Principal Scientist - Ecosystem Modelling
Principal Scientist - Marine Ecology
placeholder image
Freshwater Hydro-Ecologist
placeholder image
Coastal and Estuarine Physical Processes Scientist
Manager - Coasts and Oceans
placeholder image
Principal Scientist - Marine Ecology
Fisheries Acoustics Scientist
Principal Scientist - Coastal and Estuarine Physical Processes
placeholder image
Coastal Technician
Freshwater Fish Ecologist
placeholder image
Marine Ecology Technician
Hydrodynamics Scientist
Resource Management Scientist
Regional Manager - Auckland
Subscribe to RSS - Estuaries