References, further reading, and links to useful websites.

When soils erode, sediments are washed into waterways.

Currently, the most reliable method to estimate the age of tuna is by examination of their otoliths or "ear bones"

The climate of this area is greatly dependent on its exposure to weather systems from the Tasman Sea and the lie of the Southern Alps to the east.

Information about climate and weather and links to climate-related websites.

The Standardised Precipitation Index (SPI) is a simple measure of drought (and also of very wet conditions) and is based solely on the accumulated precipitation for a given time period.

NIWA collects a vast range of environmental information about New Zealand’s environment from the sky to the seafloor.

Wood chips and plant material make pulp that is used to produce paper products.

How may agricultural activities increase sediments in waterways?

Northland, with its northern location, low elevation and close proximity to the sea is characterised by a mild, humid, and rather windy climate.