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Temperature, growth season length and phytoplankton abundance in the Gulf of Maine

Seip, Knut Lehre
Journal article, Peer reviewed
Postprint version of published article.
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https://hdl.handle.net/10642/2581
Utgivelsesdato
2015-03-19
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  • SEN - Documents [33]
Originalversjon
Seip, K. (2014). Temperature, growth season length and phytoplankton abundance in the Gulf of Maine. Marine and Freshwater Research.   http://dx.doi.org/10.1071/MF14034
Sammendrag
I show that the relation between annual average phytoplankton concentration (as mg Chl-a.m-3) and in situ sea surface temperature, SST, is positive (Chl-a â 0.5 Ã SST, r = 0.8, p < 0.001) at an average temperature of 11oC (range 10oC â 12oC) in the Gulf of Maine. However, within seasonal observations 2005-2009 were predominant negatively associated. For the first, annual average relationship, the extension of the growth season with increasing temperature may be an important factor. I show that an increase by 1oC start the growth season 8 days earlier and lengthen the season with 13 days (temp > 10oC). Tentative calculations suggest that the increased length matches the increase in annual phytoplankton concentration. For the second, negative relationship, I suggest that warmer water during late summer increases stratification and limits nutrient supply to the upper productive layer.
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CSIRO Publishing
Serie
Marine & Freshwater Research;

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