Ecology and impacts

Non-native marine species include a range of organisms that are variously predators, competitors, parasites, pathogens or habitats for other biota. They can have a variety of subtle and strong effects on native species, ecosystem processes and the benefits that we derive from them. Some species cause significant economic costs to sectors of society, while others can have severe effects on human health or amenity. Because different stakeholders often view the changes caused by non-native species from different perspectives there can also be disparate opinions about whether a species is considered harmful, useful or benign. This research investigates the complex changes caused by non-native species to New Zealand marine ecosystems and how they affect our way of life.

Ecological changes caused by marine non-indigenous species: Waitematā Harbour case study

23 Apr 2018 12:00 AM
The Waitematā Harbour is an important ecosystem on the 'door step' of New Zealand's largest city - A...
[Figure 2: In Environmental Values Report. NIWA] Detailed view of coastal cells in a complex area of the New Zealand coastline: Cook Strait and Marlborough Sounds.

Mapping New Zealand's marine values

19 Apr 2018 12:00 AM
Non-native species are recognised as one of the greatest threats to natural environments worldwide. ...
[Image: Dave Allen, NIWA]

The impact of non-native marine pests on our takutai moana

16 Jan 2018 12:00 AM
This project seeks to understand and better implement a Māori perspective within the current marine ...
[Image: Kimberley Seaward, NIWA]

What's at stake?

14 Mar 2017 12:00 AM
This four-year research project, funded by the Ministry of Business Innovation and Employment, aims ...