Freshwater

Urban stormwater can contain a variety of contaminants at a wide range of concentrations, collected as the rainwater runs over impervious surfaces.

See our ID guides for invertebrates.

ID guides to a range of macrophytes.

Urban drainage systems include pipe networks, streams and rivers, often in a highly modified condition.

NIWA has a range of services and research capabilities to assist with assessing and managing the effects of stormwater and urban development on streams, estuaries and harbours.

NIWA has a series of identification guides available to help you identify New Zealand fish species both in the field and in the laboratory. The quick-guides are great for use in the field and the formal keys provide a greater level of detail.

Access commonly cited references for the NZFFD and the Catchments of New Zealand publication.

Our biosecurity management tools include: assessment models, field surveys, management advice and the testing of control methods.

A Ministry for Primary Industries-funded study has shown that grass carp, in enclosures, can be used as an effective means of controlling invasive plant species in our waterways.

This is a user guide on non-native fish, reptile, invertebrate, algal and plant species that are recorded in New Zealand freshwaters.

FRAM is powerful and simple to use - series of straight-forward questions about the biology and behaviour of any alien species lead to it being ranked and categorised as a high, intermediate, or low ecological risk.