Atmospheric carbon dioxide (CO2) is measured continuously at Baring Head, providing the longest running record of this type in the Southern hemisphere.

Temperature affects the number and type of animals and plants that live in a waterway.

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Dissolved oxygen (DO) is a relative measure of the amount of oxygen (O2) dissolved in water.

The 2012-2013 drought affected the entire North Island plus the west coast of the South Island.

We have prepared a breakdown of the different guidelines that are available for sampling freshwater fisheries. The overview provides links to key documents that explain what should be considered when designing fish monitoring studies and how to implement the various sampling techniques.

An interactive guide to the sponges of New Zealand.

To prepare for changes in climate, our freshwater and oceans decision-makers need information on species vulnerability to climate change.

Commercial eel fishery in New Zealand began in earnest in the 1960s and expanded rapidly until the early 1970s

Instream barriers and diversions alter the natural flow of rivers, streams, and lakes.

Dry stock farms can cover large areas of hill-country grassland that may be steep and prone to erosion.