Predicting rates of primary production in the vicinity of the Subtropical Convergence east of New Zealand
作者:
Mark Gall,
Ian Hawes,
Philip Boyd,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1999)
卷期:
Volume 33,
issue 3
页码: 443-455
ISSN:0028-8330
年代: 1999
DOI:10.1080/00288330.1999.9516890
出版商: Taylor & Francis Group
关键词: photosynthesis;P‐E;Subtropical Convergence;modelling;New Zealand
数据来源: Taylor
摘要:
Water column integrated productivity of phytoplankton in three water masses east of New Zealand (Subtropical, Subtropical Convergence, and Subantarctic) varied both seasonally and spatially, ranging across two orders of magnitude. Productivity was highest in spring and autumn, and lowest in winter. Subtropical and Convergence waters were generally more productive than Subantarctic waters, but during summer the 2–3‐fold range of production was similar in each of the three water masses. Multiple regression analysis identified that most of the variability in production was associated with differences in integrated chlorophyllaconcentrations (56%). By considering both surface chlorophyllaand incident irradiance we derived a relationship which explained 74% of observed spatial and seasonal variability in integrated production. These surface variables can be sensed remotely, suggesting the potential for broad spatial mapping of the seasonal cycles of production in these water masses in the New Zealand Exclusive Economic Zone (NZEEZ). Further analysis of the relationship identified that most of the remaining variability could be attributed topbopt(a temperature‐dependent photo‐adaptive term). Exceptions to the relationship and the application of productivity models within NZEEZ are discussed.
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