Deciphering the structure of the West Greenland marine food web using stable isotopes (δ13C, δ15N)

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Linnebjerg, Jannie FriesLund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Evolutionary ecology,Department of Biology,Faculty of Science,Aarhus University (author)

Deciphering the structure of the West Greenland marine food web using stable isotopes (δ13C, δ15N)

Article/chapterEnglish2016

Publisher, publication year, extent ...

2016-10-15
Springer Science and Business Media LLC,2016

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LIBRIS-ID:oai:lup.lub.lu.se:ad14cd10-3be8-4188-a447-1df6eee6661f
https://lup.lub.lu.se/record/ad14cd10-3be8-4188-a447-1df6eee6661fURI
https://doi.org/10.1007/s00227-016-3001-0DOI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:art swepub-publicationtype
Subject category:ref swepub-contenttype

Notes

The Arctic is facing major environmental changes impacting marine biodiversity and ecosystem functioning. One way of assessing the responses of an ecosystem to these changes is to quantitatively study food web dynamics. Here, we used stable isotope (δ15N and δ13C) analyses of 39 Arctic marine species to investigate trophic relationships and isotopic niches of the West Greenland food web in 2000–2004. The lowest δ15N values were found for suspension feeding blue mussel (Mytilus edulis; 6.1 ‰) and the highest for polar bear (Ursus maritimus; 20.2 ‰). For δ13C, copepods (Calanus spp.) had the lowest values (−20.4 ‰) and snow crab (Chionoecetes opilio) the highest values (−15.8 ‰). Our results show that the three trophic enrichment factor (TEF) approaches used to quantify species trophic positions (fixed TEF of 3.8 and 3.4 ‰ or scaled TEF) did not generally affect trophic modelling and provided similar conclusions. Overall, the findings in this study are in good agreement with previous investigations of other Arctic marine ecosystems. Interestingly, we found little overlap of core isotopic niches used by the four investigated functional groups (mammals, seabirds, fish and invertebrates), except for seabirds and fish where an overlap of 24 % was found. These results provide new insights into species and functional group interactions, as well as into the food web structure and ecosystem functioning of an important Arctic region that can be used as a template to guide future modelling of carbon, energy and contaminant flow in the region.

Subject headings and genre

NATURVETENSKAP Biologi Ekologi hsv//swe
NATURAL SCIENCES Biological Sciences Ecology hsv//eng

Added entries (persons, corporate bodies, meetings, titles ...)

Hobson, Keith A.Environment Canada (author)
Fort, JérômeAarhus University,University of La Rochelle (author)
Nielsen, Torkel GisselGreenland Institute of Natural Resources,Technical University of Denmark (author)
Møller, PerKalundborg Municipality (author)
Wieland, KaiTechnical University of Denmark (author)
Born, Erik W.Greenland Institute of Natural Resources (author)
Rigét, Frank F.Aarhus University (author)
Mosbech, AndersAarhus University (author)
Evolutionär ekologiBiologiska institutionen (creator_code:org_t)

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In:Marine Biology: Springer Science and Business Media LLC163:110025-31621432-1793

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NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Ecology

Articles in the publication: Marine Biology

By the university: Lund University

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