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Nutrients and wastewater
How do nutrients from wastewater treatment enter waterways? -
Coralline Algae
This identification guide covers the common crustose coralline algae found in central New Zealand. -
Impacts of hydro
Impacts of hydro-electric activities on water quality and mahinga kai. -
Analysis of water quality trends
NIWA has developed a powerful software tool for the analysis of water quality data. -
Mitigation and best practice options
Some simple steps to minimise the effects of wastewater on water quality and mahinga kai. -
Sediment and urbanisation
How does urbanisation increase sediments in waterways? -
Piharau
Piharau/kanakana are an important mahinga kai species and a prized delicacy for many Māori. -
Aquaculture Activities
Shellfish gathering and farming take place in marine and freshwater environments. -
Chemical contamination
Chemical contaminants are chemicals toxic to plants and animals in waterways. -
Tuna - spawning grounds
All species of freshwater tuna spawn at sea, although the spawning grounds of only four species are known with certainty worldwide. -
NZ Freshwater Fish Database Help
Learn how to use the New Zealand Freshwater Fish Database (NZFFD)
