New primary production in northwest European shelf seas, 1960–2003
Spatial and temporal patterns from 1960 to 2003 in annual potential new primary production (PNP) of the NW European shelf seas were derived from general additive models of nitrate concentrations and from data on riverine and atmospheric fluxes of oxidized nitrogen. Average PNP was highest in the sea...
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Online Access: | https://strathprints.strath.ac.uk/18647/ https://strathprints.strath.ac.uk/18647/6/strathprints018647.pdf https://doi.org/10.3354/meps07460 |
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ftustrathclyde:oai:strathprints.strath.ac.uk:18647 2024-05-19T07:45:23+00:00 New primary production in northwest European shelf seas, 1960–2003 Heath, M.R. Beare, D.J. 2008 text https://strathprints.strath.ac.uk/18647/ https://strathprints.strath.ac.uk/18647/6/strathprints018647.pdf https://doi.org/10.3354/meps07460 en eng https://strathprints.strath.ac.uk/18647/6/strathprints018647.pdf Heath, M.R. <https://strathprints.strath.ac.uk/view/author/430104.html> and Beare, D.J., Scottish Government Marine Directorate (Funder), Joint Research Centre (JRC), Ispra (Funder) (2008 <https://strathprints.strath.ac.uk/view/year/2008.html>) New primary production in northwest European shelf seas, 1960–2003. Marine Ecology Progress Series <https://strathprints.strath.ac.uk/view/publications/Marine_Ecology_Progress_Series.html>, 363. pp. 183-203. ISSN 0171-8630 Mathematics Article PeerReviewed 2008 ftustrathclyde https://doi.org/10.3354/meps07460 2024-04-30T23:45:09Z Spatial and temporal patterns from 1960 to 2003 in annual potential new primary production (PNP) of the NW European shelf seas were derived from general additive models of nitrate concentrations and from data on riverine and atmospheric fluxes of oxidized nitrogen. Average PNP was highest in the seasonally stratified outer shelf regions (>70 gC m-2 yr-1), where the proportion of PNP accounted for by vertical fluxes from deep water (>65%) was correlated with the North Atlantic Oscillation (NAO) index. PNP was lowest in the central North Sea (~30 gC m-2 yr-1) and in the southern North Sea was correlated with river inputs that accounted for 24% of the annual total (average ~50 gC m-2 yr-1). Atmospheric deposition accounted for ~3% of annual PNP region-wide, but in the northern North Sea this was higher than the contribution from rivers. Tidal fronts are traditionally considered to be highly productive zones, but we find them to have characteristically low PNP and conclude that they must be loci of high recycled production. The results indicate an exceptional flux of nitrate-rich ocean water onto the shelf in the early 1990s, which resulted in a pulse of PNP coincident with a well-documented 'regime shift' in the pelagic food web. North Sea-wide, long-term average PNP was approximately equal to production by all higher trophic levels combined, though trophic propagation of inter-annual variations was weakly defined. Nevertheless, there is a case for proposing that harvesting in areas and periods of low PNP should be managed more conservatively to minimize the risk of detrimental effects on the food web. Article in Journal/Newspaper North Atlantic North Atlantic oscillation University of Strathclyde Glasgow: Strathprints Marine Ecology Progress Series 363 183 203 |
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Open Polar |
collection |
University of Strathclyde Glasgow: Strathprints |
op_collection_id |
ftustrathclyde |
language |
English |
topic |
Mathematics |
spellingShingle |
Mathematics Heath, M.R. Beare, D.J. New primary production in northwest European shelf seas, 1960–2003 |
topic_facet |
Mathematics |
description |
Spatial and temporal patterns from 1960 to 2003 in annual potential new primary production (PNP) of the NW European shelf seas were derived from general additive models of nitrate concentrations and from data on riverine and atmospheric fluxes of oxidized nitrogen. Average PNP was highest in the seasonally stratified outer shelf regions (>70 gC m-2 yr-1), where the proportion of PNP accounted for by vertical fluxes from deep water (>65%) was correlated with the North Atlantic Oscillation (NAO) index. PNP was lowest in the central North Sea (~30 gC m-2 yr-1) and in the southern North Sea was correlated with river inputs that accounted for 24% of the annual total (average ~50 gC m-2 yr-1). Atmospheric deposition accounted for ~3% of annual PNP region-wide, but in the northern North Sea this was higher than the contribution from rivers. Tidal fronts are traditionally considered to be highly productive zones, but we find them to have characteristically low PNP and conclude that they must be loci of high recycled production. The results indicate an exceptional flux of nitrate-rich ocean water onto the shelf in the early 1990s, which resulted in a pulse of PNP coincident with a well-documented 'regime shift' in the pelagic food web. North Sea-wide, long-term average PNP was approximately equal to production by all higher trophic levels combined, though trophic propagation of inter-annual variations was weakly defined. Nevertheless, there is a case for proposing that harvesting in areas and periods of low PNP should be managed more conservatively to minimize the risk of detrimental effects on the food web. |
format |
Article in Journal/Newspaper |
author |
Heath, M.R. Beare, D.J. |
author_facet |
Heath, M.R. Beare, D.J. |
author_sort |
Heath, M.R. |
title |
New primary production in northwest European shelf seas, 1960–2003 |
title_short |
New primary production in northwest European shelf seas, 1960–2003 |
title_full |
New primary production in northwest European shelf seas, 1960–2003 |
title_fullStr |
New primary production in northwest European shelf seas, 1960–2003 |
title_full_unstemmed |
New primary production in northwest European shelf seas, 1960–2003 |
title_sort |
new primary production in northwest european shelf seas, 1960–2003 |
publishDate |
2008 |
url |
https://strathprints.strath.ac.uk/18647/ https://strathprints.strath.ac.uk/18647/6/strathprints018647.pdf https://doi.org/10.3354/meps07460 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://strathprints.strath.ac.uk/18647/6/strathprints018647.pdf Heath, M.R. <https://strathprints.strath.ac.uk/view/author/430104.html> and Beare, D.J., Scottish Government Marine Directorate (Funder), Joint Research Centre (JRC), Ispra (Funder) (2008 <https://strathprints.strath.ac.uk/view/year/2008.html>) New primary production in northwest European shelf seas, 1960–2003. Marine Ecology Progress Series <https://strathprints.strath.ac.uk/view/publications/Marine_Ecology_Progress_Series.html>, 363. pp. 183-203. ISSN 0171-8630 |
op_doi |
https://doi.org/10.3354/meps07460 |
container_title |
Marine Ecology Progress Series |
container_volume |
363 |
container_start_page |
183 |
op_container_end_page |
203 |
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1799485413976440832 |