The effect of coastal processes on phytoplankton biomass and primary production within the near-shore Subtropical Frontal Zone
This study evaluated drivers of phytoplankton net primary production (NPP) rates and chlorophyll-a (chl-'a') concentrations within the coastally oriented Subtropical Frontal Zone (STFZ) off the South Island of New Zealand. Time series measurements of hydrographic parameters, macronutrients...
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ftunivnewengland:oai:rune.une.edu.au:1959.11/16000 2023-08-27T04:05:01+02:00 The effect of coastal processes on phytoplankton biomass and primary production within the near-shore Subtropical Frontal Zone Jones, Katherine N Currie, Kim I McGraw, Christina School of Science and Technology Hunter, Keith A 2013 https://hdl.handle.net/1959.11/16000 en eng Academic Press 10.1016/j.ecss.2013.03.003 https://hdl.handle.net/1959.11/16000 une:16237 Biological Oceanography Chemical Oceanography Journal Article 2013 ftunivnewengland 2023-08-10T18:59:34Z This study evaluated drivers of phytoplankton net primary production (NPP) rates and chlorophyll-a (chl-'a') concentrations within the coastally oriented Subtropical Frontal Zone (STFZ) off the South Island of New Zealand. Time series measurements of hydrographic parameters, macronutrients, size fractionated NPP and chl-a were conducted on a bi-monthly basis from July 2009 to November 2010. This study found that nutrient limitation in these waters is controlled by the dual influx of silicate inputs from riverine sources in coastal neritic water (NW) and oceanic inputs of nitrate from the high nutrient, low chlorophyll (HNLC) region of the offshore Sub-Antarctic Surface Waters (SASW). Total chl-'a' concentrations and primary production rates were perennially higher in near-shore NW and modified Subtropical waters (STW) than in the SASW, with highest indicators of biological production observed in the Austral spring and summer seasons (October to March). These periods of peak production and biomass were dominated in both parameters by microphytoplankton (>20 μm) size fractions. The coupled dominance by these large phytoplankton and the near depletion of silicate in all characterised waters within the frontal system indicate the importance of silicic diatoms as drivers of bloom production. The influence of coastal waters on the STFZ system is most pronounced with the intrusion of neritic water beyond the shelf boundary during periods of surface water thermal stratification and riverine dilution through flooding events. These two events were notably observed during the Spring 2009 sampling cruise in December 2009 and in the flood event in May 2010. Article in Journal/Newspaper Antarc* Antarctic Research UNE - University of New England at Armidale, NSW Australia Antarctic Austral New Zealand |
institution |
Open Polar |
collection |
Research UNE - University of New England at Armidale, NSW Australia |
op_collection_id |
ftunivnewengland |
language |
English |
topic |
Biological Oceanography Chemical Oceanography |
spellingShingle |
Biological Oceanography Chemical Oceanography Jones, Katherine N Currie, Kim I McGraw, Christina School of Science and Technology Hunter, Keith A The effect of coastal processes on phytoplankton biomass and primary production within the near-shore Subtropical Frontal Zone |
topic_facet |
Biological Oceanography Chemical Oceanography |
description |
This study evaluated drivers of phytoplankton net primary production (NPP) rates and chlorophyll-a (chl-'a') concentrations within the coastally oriented Subtropical Frontal Zone (STFZ) off the South Island of New Zealand. Time series measurements of hydrographic parameters, macronutrients, size fractionated NPP and chl-a were conducted on a bi-monthly basis from July 2009 to November 2010. This study found that nutrient limitation in these waters is controlled by the dual influx of silicate inputs from riverine sources in coastal neritic water (NW) and oceanic inputs of nitrate from the high nutrient, low chlorophyll (HNLC) region of the offshore Sub-Antarctic Surface Waters (SASW). Total chl-'a' concentrations and primary production rates were perennially higher in near-shore NW and modified Subtropical waters (STW) than in the SASW, with highest indicators of biological production observed in the Austral spring and summer seasons (October to March). These periods of peak production and biomass were dominated in both parameters by microphytoplankton (>20 μm) size fractions. The coupled dominance by these large phytoplankton and the near depletion of silicate in all characterised waters within the frontal system indicate the importance of silicic diatoms as drivers of bloom production. The influence of coastal waters on the STFZ system is most pronounced with the intrusion of neritic water beyond the shelf boundary during periods of surface water thermal stratification and riverine dilution through flooding events. These two events were notably observed during the Spring 2009 sampling cruise in December 2009 and in the flood event in May 2010. |
format |
Article in Journal/Newspaper |
author |
Jones, Katherine N Currie, Kim I McGraw, Christina School of Science and Technology Hunter, Keith A |
author_facet |
Jones, Katherine N Currie, Kim I McGraw, Christina School of Science and Technology Hunter, Keith A |
author_sort |
Jones, Katherine N |
title |
The effect of coastal processes on phytoplankton biomass and primary production within the near-shore Subtropical Frontal Zone |
title_short |
The effect of coastal processes on phytoplankton biomass and primary production within the near-shore Subtropical Frontal Zone |
title_full |
The effect of coastal processes on phytoplankton biomass and primary production within the near-shore Subtropical Frontal Zone |
title_fullStr |
The effect of coastal processes on phytoplankton biomass and primary production within the near-shore Subtropical Frontal Zone |
title_full_unstemmed |
The effect of coastal processes on phytoplankton biomass and primary production within the near-shore Subtropical Frontal Zone |
title_sort |
effect of coastal processes on phytoplankton biomass and primary production within the near-shore subtropical frontal zone |
publisher |
Academic Press |
publishDate |
2013 |
url |
https://hdl.handle.net/1959.11/16000 |
geographic |
Antarctic Austral New Zealand |
geographic_facet |
Antarctic Austral New Zealand |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
10.1016/j.ecss.2013.03.003 https://hdl.handle.net/1959.11/16000 une:16237 |
_version_ |
1775355369650913280 |