Trophodynamics and functional feeding groups of North Sea fauna: a combined stable isotope and fatty acid approach
The trophodynamics of pelagic and benthic animals of the North Sea, North Atlantic shelf, were assessed using stable isotope analysis (SIA) of natural abundance carbon and nitrogen isotopes, lipid fingerprinting and compound-specific SIA (CSIA) of phospholipid-derived fatty acids (PLFAs). Zooplankto...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/252853 2023-07-23T04:20:47+02:00 Trophodynamics and functional feeding groups of North Sea fauna: a combined stable isotope and fatty acid approach Kürten, B. Frutos, I. Struck, U. Painting, S.J. Polunin, N.V.C. Middelburg, J.J. 2012-02 image/pdf https://dspace.library.uu.nl/handle/1874/252853 en eng 0168-2563 https://dspace.library.uu.nl/handle/1874/252853 info:eu-repo/semantics/ClosedAccess Aardwetenschappen Benthic–pelagic coupling Food web structure Phospholipid-derived fatty acids Suprabenthos Trophodynamics Zooplankton Article 2012 ftunivutrecht 2023-07-02T00:31:47Z The trophodynamics of pelagic and benthic animals of the North Sea, North Atlantic shelf, were assessed using stable isotope analysis (SIA) of natural abundance carbon and nitrogen isotopes, lipid fingerprinting and compound-specific SIA (CSIA) of phospholipid-derived fatty acids (PLFAs). Zooplankton (z), epi- and supra-benthic macrofauna were collected in the Southern Bight, at the Oyster Grounds and at North Dogger, 111 km north of the Dogger Bank. The study included 22 taxonomic groups with particular reference to Mollusca (Bivalvia and Gastropoda) and Crustacea. Primary consumers (Bivalvia) were overall most 15N enriched in the southern North Sea (6.1‰) and more depleted in the Oyster Grounds (5.5‰) and at North Dogger (2.8‰) demonstrating differences in isotopic baselines for bivalve fauna between the study sites. Higher trophic levels also followed this trend. Over an annual cycle, consumers tended to exhibit 15N depletion during spring followed by 15N enriched signatures in autumn and winter. The observed seasonal changes of δ15N were more pronounced for suspension feeders and deposit feeders (dfs) than for filter feeders (ffs). The position of animals in plots of δ13C and δ15N largely concurred with the expected position according to literature-based functional feeding groups. PLFA fingerprints of groups such as z were distinct from benthic groups, e.g. benthic ffs and dfs, and predatory macrobenthos. δ 13C PLFA signatures indicated similarities in 13C moiety sources that constituted δ13C PLFA. Although functional groups of pelagic zooplankton and (supra-) benthic animals represented phylogenetically distinct consumer groups, δ13C PLFA demonstrated that both groups were supported by pelagic primary production and relied on the same macronutrients such as PLFAs. Errors related to the static categorization of small invertebrates into fixed trophic positions defined by phylogenetic groupings rather than by functional feeding groups, and information on seasonal trophodynamic variability, may have ... Article in Journal/Newspaper North Atlantic Utrecht University Repository Dogger Bank ENVELOPE(2.333,2.333,54.833,54.833) |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Aardwetenschappen Benthic–pelagic coupling Food web structure Phospholipid-derived fatty acids Suprabenthos Trophodynamics Zooplankton |
spellingShingle |
Aardwetenschappen Benthic–pelagic coupling Food web structure Phospholipid-derived fatty acids Suprabenthos Trophodynamics Zooplankton Kürten, B. Frutos, I. Struck, U. Painting, S.J. Polunin, N.V.C. Middelburg, J.J. Trophodynamics and functional feeding groups of North Sea fauna: a combined stable isotope and fatty acid approach |
topic_facet |
Aardwetenschappen Benthic–pelagic coupling Food web structure Phospholipid-derived fatty acids Suprabenthos Trophodynamics Zooplankton |
description |
The trophodynamics of pelagic and benthic animals of the North Sea, North Atlantic shelf, were assessed using stable isotope analysis (SIA) of natural abundance carbon and nitrogen isotopes, lipid fingerprinting and compound-specific SIA (CSIA) of phospholipid-derived fatty acids (PLFAs). Zooplankton (z), epi- and supra-benthic macrofauna were collected in the Southern Bight, at the Oyster Grounds and at North Dogger, 111 km north of the Dogger Bank. The study included 22 taxonomic groups with particular reference to Mollusca (Bivalvia and Gastropoda) and Crustacea. Primary consumers (Bivalvia) were overall most 15N enriched in the southern North Sea (6.1‰) and more depleted in the Oyster Grounds (5.5‰) and at North Dogger (2.8‰) demonstrating differences in isotopic baselines for bivalve fauna between the study sites. Higher trophic levels also followed this trend. Over an annual cycle, consumers tended to exhibit 15N depletion during spring followed by 15N enriched signatures in autumn and winter. The observed seasonal changes of δ15N were more pronounced for suspension feeders and deposit feeders (dfs) than for filter feeders (ffs). The position of animals in plots of δ13C and δ15N largely concurred with the expected position according to literature-based functional feeding groups. PLFA fingerprints of groups such as z were distinct from benthic groups, e.g. benthic ffs and dfs, and predatory macrobenthos. δ 13C PLFA signatures indicated similarities in 13C moiety sources that constituted δ13C PLFA. Although functional groups of pelagic zooplankton and (supra-) benthic animals represented phylogenetically distinct consumer groups, δ13C PLFA demonstrated that both groups were supported by pelagic primary production and relied on the same macronutrients such as PLFAs. Errors related to the static categorization of small invertebrates into fixed trophic positions defined by phylogenetic groupings rather than by functional feeding groups, and information on seasonal trophodynamic variability, may have ... |
format |
Article in Journal/Newspaper |
author |
Kürten, B. Frutos, I. Struck, U. Painting, S.J. Polunin, N.V.C. Middelburg, J.J. |
author_facet |
Kürten, B. Frutos, I. Struck, U. Painting, S.J. Polunin, N.V.C. Middelburg, J.J. |
author_sort |
Kürten, B. |
title |
Trophodynamics and functional feeding groups of North Sea fauna: a combined stable isotope and fatty acid approach |
title_short |
Trophodynamics and functional feeding groups of North Sea fauna: a combined stable isotope and fatty acid approach |
title_full |
Trophodynamics and functional feeding groups of North Sea fauna: a combined stable isotope and fatty acid approach |
title_fullStr |
Trophodynamics and functional feeding groups of North Sea fauna: a combined stable isotope and fatty acid approach |
title_full_unstemmed |
Trophodynamics and functional feeding groups of North Sea fauna: a combined stable isotope and fatty acid approach |
title_sort |
trophodynamics and functional feeding groups of north sea fauna: a combined stable isotope and fatty acid approach |
publishDate |
2012 |
url |
https://dspace.library.uu.nl/handle/1874/252853 |
long_lat |
ENVELOPE(2.333,2.333,54.833,54.833) |
geographic |
Dogger Bank |
geographic_facet |
Dogger Bank |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
0168-2563 https://dspace.library.uu.nl/handle/1874/252853 |
op_rights |
info:eu-repo/semantics/ClosedAccess |
_version_ |
1772185521314856960 |