Climate change is one of the defining societal and environmental challenges of the 21st century, for New Zealand and the planet.
The warming of many lakes globally has been documented by a multi-authored international publication.
Evaluations of coastal wetland resilience to rising sea levels must be based on site measurements rather than relying on sea-level trends from off-site tide gauges.
“Citizen science” is a buzz word in environment and conservation circles these days. New technologies and increasing concern about the state of our environment are coming together, and more members of the public are getting out there to monitor everything from snowfall to shifts in species distributions. With freshwater quality still the number one environmental issue of public concern in New Zealand, it is not surprising that stream monitoring is a growing area for citizen science.
Freshwater invertebrates vary in their sensitivity to different environmental stressors. This means that the community of invertebrates living in a waterway can be used to give an indication of the ‘health’ of the system (i.e. “canaries in the cage”).
Eddy covariance network allows NIWA to investigate the role of climate, vegetation and management practices on evaporative water loss from agricultural land-uses.
Water resources are important to New Zealand’s economy and electricity supply and we are fortunate to receive as much precipitation as we do. Compared with many other countries New Zealand is relative water-rich. But this abundance varies from year to year, month to month, and region to region, leaving some places with too much at times (flooding) or with too little (drought).
A monitoring buoy in Lake Taupo delivers continuous data on lake water quality, providing a up-to-date picture of the lake health.
Tau kōura is a traditional Māori fishing method commonly used to harvest kōura or freshwater crayfish in areas where they are abundant.
Winter river water temperatures were mostly in the range 4-12C in both islands and a little lower in alpine-fed rivers of South Island.
NIWA is working with stakeholders from Lake Ōmāpere to discuss the reintroduction of plants from the Lake — plants that were 'extinct in the wild'.
The types and amounts of macrophytes in streams has implications for ecosystem health. This article discusses the current approaches for measurement and management of marophytes.
By September however many South Island rivers had receded to normal or below, while the North Island remained or became wetter than normal.
Increasing interest in citizen science is benefiting environmental monitoring. Citizen data supplements professional data, meaning more data collection overall.
NIWA and Waipa District Council are working together to demonstrate the use of enhanced pond systems (EPS) to achieve cost-effective, efficient wastewater treatment.
It’s now almost ten years since blooms of the stalked diatom Didymosphenia geminata – commonly known as didymo, or “rock snot” – were first discovered in the Waiau River, Southland.
All staff working on this subject
Principal Scientist - Coastal and Estuarine Physical Processes