Trophic position of coexisting krill species: a stable isotope approach
Four krill species with overlapping functional biology coexist in Greenland waters. Here, we used stable isotopes to investigate and discuss their trophic role and mode of coexistence. Bulk carbon (δ13C) and nitrogen (δ15N) stable isotope analyses of Thysanoessa longicaudata, T. inermis, T. raschii...
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ftzenodo:oai:zenodo.org:46281 2023-06-06T11:51:09+02:00 Trophic position of coexisting krill species: a stable isotope approach Agersted, Mette Dalgaard Bode, Antonio Nielsen, Torkel Gissel 2014-12-03 https://zenodo.org/record/46281 https://doi.org/10.3354/meps11055 unknown info:eu-repo/grantAgreement/EC/FP7/264933/ https://zenodo.org/communities/euro-basin https://zenodo.org/communities/ecfunded https://zenodo.org/record/46281 https://doi.org/10.3354/meps11055 oai:zenodo.org:46281 info:eu-repo/semantics/openAccess Marine Ecology Progress Series 516 139-151 (2014) Thysanoessa spp Meganyctiphanes norvegica Carbon stable isotope δ13C Nitrogen stable isotope δ15N Sub-Arctic Food web info:eu-repo/semantics/article publication-article 2014 ftzenodo https://doi.org/10.3354/meps11055 2023-04-13T21:48:10Z Four krill species with overlapping functional biology coexist in Greenland waters. Here, we used stable isotopes to investigate and discuss their trophic role and mode of coexistence. Bulk carbon (δ13C) and nitrogen (δ15N) stable isotope analyses of Thysanoessa longicaudata, T. inermis, T. raschii and Meganyctiphanes norvegica sampled in June 2010 in Godthåbsfjord, SW Greenland, revealed new insight into the species’ trophic roles and positions. There was a general positive correlation between body length and trophic position. The largest species, M. norvegica, had the highest trophic position (TP [mean ± SE] = 2.8 ± 0.2) indicating carnivory, while T. inermis (TP = 2.4 ± 0.3) had a more omnivorous diet. In turn, T. longicaudata and T. raschii (TP = 2.2 ± 0.2) were herbivorous. Along the fjord, plankton composition affected trophic position. T. longicaudata was more omnivorous offshore than inshore, where it had the same trophic position as the baseline primary consumer Calanus spp. Similarly, T. raschii and T. inermis had higher trophic positions in the mouth of the fjord compared with the inner fjord. Regardless of spatial variations in potential food and the overlap in diet, typical of opportunistic species, body size appears as the key factor determining the role and position of krill in the food web. Article in Journal/Newspaper Arctic Godthåbsfjord Greenland Meganyctiphanes norvegica Zenodo Arctic Greenland Marine Ecology Progress Series 516 139 151 |
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Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Thysanoessa spp Meganyctiphanes norvegica Carbon stable isotope δ13C Nitrogen stable isotope δ15N Sub-Arctic Food web |
spellingShingle |
Thysanoessa spp Meganyctiphanes norvegica Carbon stable isotope δ13C Nitrogen stable isotope δ15N Sub-Arctic Food web Agersted, Mette Dalgaard Bode, Antonio Nielsen, Torkel Gissel Trophic position of coexisting krill species: a stable isotope approach |
topic_facet |
Thysanoessa spp Meganyctiphanes norvegica Carbon stable isotope δ13C Nitrogen stable isotope δ15N Sub-Arctic Food web |
description |
Four krill species with overlapping functional biology coexist in Greenland waters. Here, we used stable isotopes to investigate and discuss their trophic role and mode of coexistence. Bulk carbon (δ13C) and nitrogen (δ15N) stable isotope analyses of Thysanoessa longicaudata, T. inermis, T. raschii and Meganyctiphanes norvegica sampled in June 2010 in Godthåbsfjord, SW Greenland, revealed new insight into the species’ trophic roles and positions. There was a general positive correlation between body length and trophic position. The largest species, M. norvegica, had the highest trophic position (TP [mean ± SE] = 2.8 ± 0.2) indicating carnivory, while T. inermis (TP = 2.4 ± 0.3) had a more omnivorous diet. In turn, T. longicaudata and T. raschii (TP = 2.2 ± 0.2) were herbivorous. Along the fjord, plankton composition affected trophic position. T. longicaudata was more omnivorous offshore than inshore, where it had the same trophic position as the baseline primary consumer Calanus spp. Similarly, T. raschii and T. inermis had higher trophic positions in the mouth of the fjord compared with the inner fjord. Regardless of spatial variations in potential food and the overlap in diet, typical of opportunistic species, body size appears as the key factor determining the role and position of krill in the food web. |
format |
Article in Journal/Newspaper |
author |
Agersted, Mette Dalgaard Bode, Antonio Nielsen, Torkel Gissel |
author_facet |
Agersted, Mette Dalgaard Bode, Antonio Nielsen, Torkel Gissel |
author_sort |
Agersted, Mette Dalgaard |
title |
Trophic position of coexisting krill species: a stable isotope approach |
title_short |
Trophic position of coexisting krill species: a stable isotope approach |
title_full |
Trophic position of coexisting krill species: a stable isotope approach |
title_fullStr |
Trophic position of coexisting krill species: a stable isotope approach |
title_full_unstemmed |
Trophic position of coexisting krill species: a stable isotope approach |
title_sort |
trophic position of coexisting krill species: a stable isotope approach |
publishDate |
2014 |
url |
https://zenodo.org/record/46281 https://doi.org/10.3354/meps11055 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Godthåbsfjord Greenland Meganyctiphanes norvegica |
genre_facet |
Arctic Godthåbsfjord Greenland Meganyctiphanes norvegica |
op_source |
Marine Ecology Progress Series 516 139-151 (2014) |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/264933/ https://zenodo.org/communities/euro-basin https://zenodo.org/communities/ecfunded https://zenodo.org/record/46281 https://doi.org/10.3354/meps11055 oai:zenodo.org:46281 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps11055 |
container_title |
Marine Ecology Progress Series |
container_volume |
516 |
container_start_page |
139 |
op_container_end_page |
151 |
_version_ |
1767956884429471744 |