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This dataset was first added to MfE Data Service on 14 Oct 2016.
Primary productivity anomalies, 2015
Environmental Reporting, Ministry for the Environment and Statistics New Zealand
2016-10-27
The average concentration of chlorophyll-a (chl-a) in phytoplankton for 2015.
Concentrations of chl-a in phytoplankton are used to assess primary productivity in our oceans. Phytoplankton are primary producers of biomass (mass of living organisms) and form the main basis of marine food chains. They use the chl-a pigment to capture the sun’s energy through the process of photosynthesis. Phytoplankton growth is affected by the availability of nutrients and light, which in turn are affected by the structure of the surface water column. The surface water column structure is affected by oceanographic and climate processes; large-scale changes to climate and oceanographic conditions can lead to changes in phytoplankton growth and chl-a concentrations.
Source:
NIWA
Method:
Data are based on measurements from the SeaWiFS and MODIS-Aqua satellite ocean colour sensors. Anomalies are where chlorophyll-a concentrations deviated from the long-term (1997–2014) mean (Pinkerton, 2016).
Primary productivity anomalies are inferred from observed changes in near-surface concentrations of chlorophyll-a (chl-a) for five selected regions over time: the New Zealand exclusive economic zone (EEZ) as a whole, the Chatham Rise, northern subtropical waters, subantarctic waters, and the Tasman Sea.
-57.5121843068 157.021328158 -23.9957073089 -167.024629596
https://data.mfe.govt.nz/layer/53460-primary-productivity-anomalies-2015/
eng
New Zealand
MARINE
MARINE-Biology
FAUNA-Vertebrates
ECOLOGY-Habitat
BOUNDARIES
environment