Primary production and nitrate uptake within the seasonal thermocline of a stratified shelf sea
Hickman, A.E.; Moore, C.M.; Sharples, J.; Lucas, M.I.; Tilstone, G.H.; Krivtsov, V.; Holligan, P.M. (2012). Primary production and nitrate uptake within the seasonal thermocline of a stratified shelf sea. Mar. Ecol. Prog. Ser. 463: 39–57. http://dx.doi.org/10.3354/meps09836
In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630; e-ISSN 1616-1599, more
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| Keywords |
Aquatic communities > Plankton > Phytoplankton
Biological production > Primary production
Chemical reactions > Photochemical reactions > Photosynthesis
Chemical reactions > Photochemical reactions > Photosynthesis > Carbon fixation
Continental shelf
Irradiance
ANE, Celtic Sea [Marine Regions]
Marine/Coastal |
| Author keywords |
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| Authors | | Top |
- Hickman, A.E.
- Moore, C.M.
- Sharples, J.
- Lucas, M.I.
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- Tilstone, G.H., more
- Krivtsov, V.
- Holligan, P.M.
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| Abstract |
The Celtic Sea acts as a control site for ISECA as it is not subject to eutrophication. The influence of nitrate on primary production was assessed at this site. Comparison of carbon (14C) fixation and nitrate (15NO3) uptake versus irradiance experiments revealed that the proportion of 15NO3 uptake compared to 14C fixed was higher at the seasonal chlorophyll maximum (SCM) than in the upper part of the thermocline where nitrate was depleted. Production fuelled by new nitrate from below the thermocline was estimated to be ~5 - 19 g C m-2, which is around half that expected for the spring bloom. These figures provide a baseline for primary production in the 2-Seas area in the context of eutrophication in the North Sea. |
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