Long-term changes in habitat and trophic level of Southern Ocean squid in relation to environmental conditions
Long-term studies of pelagic nekton in the Southern Ocean and their responses to ongoing environmental change are rare. Using stable isotope ratios measured in squid beaks recovered from diet samples of wandering albatrosses Diomedea exulans, we assessed decadal variation (from 1976 to 2016) in the...
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ftunivcoimbra:oai:estudogeral.uc.pt:10316/106710 2024-06-23T07:47:20+00:00 Long-term changes in habitat and trophic level of Southern Ocean squid in relation to environmental conditions Abreu, José Phillips, Richard A. Ceia, Filipe R. Ireland, Louise Paiva, Vítor H. Xavier, José C. 2020-09-16 https://hdl.handle.net/10316/106710 https://doi.org/10.1038/s41598-020-72103-6 eng eng Springer Nature #PLACEHOLDER_PARENT_METADATA_VALUE# UID/MAR/04292/2020 2045-2322 https://hdl.handle.net/10316/106710 doi:10.1038/s41598-020-72103-6 info:eu-repo/semantics/openAccess Animal Feed Animals Beak Birds Carbon Isotopes Decapodiformes Ecosystem Food Chain Nitrogen Isotopes Oceans and Seas info:eu-repo/semantics/article 2020 ftunivcoimbra https://doi.org/10.1038/s41598-020-72103-6 2024-06-11T23:48:49Z Long-term studies of pelagic nekton in the Southern Ocean and their responses to ongoing environmental change are rare. Using stable isotope ratios measured in squid beaks recovered from diet samples of wandering albatrosses Diomedea exulans, we assessed decadal variation (from 1976 to 2016) in the habitat (δ13C) and trophic level (δ15N) of five important Southern Ocean squid species in relation to indices of environmental conditions-Southern Oscillation Index (SOI) and Southern Annular Mode (SAM). Based on δ13C values, corrected for the Suess effect, habitat had changed over the last 50 years for Taonius sp. B (Voss), Gonatus antarcticus, Galiteuthis glacialis and Histioteuthis atlantica but not Moroteuthopsis longimana. By comparison, mean δ15N values were similar across decades for all five species, suggesting minimal changes in trophic levels. Both SAM and SOI have increased in strength and frequency over the study period but, of the five species, only in Taonius sp. B (Voss) did these indices correlate with, δ13C and δ15N values, indicating direct relationships between environmental conditions, habitat and trophic level. The five cephalopod species therefore changed their habitats with changing environmental conditions over the last 50 years but maintained similar trophic levels. Hence, cephalopods are likely to remain important prey for top predators in Southern Ocean food webs, despite ongoing climate change. Article in Journal/Newspaper Antarc* antarcticus Diomedea exulans Southern Ocean Universidade de Coimbra: Estudo Geral Soi ENVELOPE(30.704,30.704,66.481,66.481) Southern Ocean Scientific Reports 10 1 |
institution |
Open Polar |
collection |
Universidade de Coimbra: Estudo Geral |
op_collection_id |
ftunivcoimbra |
language |
English |
topic |
Animal Feed Animals Beak Birds Carbon Isotopes Decapodiformes Ecosystem Food Chain Nitrogen Isotopes Oceans and Seas |
spellingShingle |
Animal Feed Animals Beak Birds Carbon Isotopes Decapodiformes Ecosystem Food Chain Nitrogen Isotopes Oceans and Seas Abreu, José Phillips, Richard A. Ceia, Filipe R. Ireland, Louise Paiva, Vítor H. Xavier, José C. Long-term changes in habitat and trophic level of Southern Ocean squid in relation to environmental conditions |
topic_facet |
Animal Feed Animals Beak Birds Carbon Isotopes Decapodiformes Ecosystem Food Chain Nitrogen Isotopes Oceans and Seas |
description |
Long-term studies of pelagic nekton in the Southern Ocean and their responses to ongoing environmental change are rare. Using stable isotope ratios measured in squid beaks recovered from diet samples of wandering albatrosses Diomedea exulans, we assessed decadal variation (from 1976 to 2016) in the habitat (δ13C) and trophic level (δ15N) of five important Southern Ocean squid species in relation to indices of environmental conditions-Southern Oscillation Index (SOI) and Southern Annular Mode (SAM). Based on δ13C values, corrected for the Suess effect, habitat had changed over the last 50 years for Taonius sp. B (Voss), Gonatus antarcticus, Galiteuthis glacialis and Histioteuthis atlantica but not Moroteuthopsis longimana. By comparison, mean δ15N values were similar across decades for all five species, suggesting minimal changes in trophic levels. Both SAM and SOI have increased in strength and frequency over the study period but, of the five species, only in Taonius sp. B (Voss) did these indices correlate with, δ13C and δ15N values, indicating direct relationships between environmental conditions, habitat and trophic level. The five cephalopod species therefore changed their habitats with changing environmental conditions over the last 50 years but maintained similar trophic levels. Hence, cephalopods are likely to remain important prey for top predators in Southern Ocean food webs, despite ongoing climate change. |
format |
Article in Journal/Newspaper |
author |
Abreu, José Phillips, Richard A. Ceia, Filipe R. Ireland, Louise Paiva, Vítor H. Xavier, José C. |
author_facet |
Abreu, José Phillips, Richard A. Ceia, Filipe R. Ireland, Louise Paiva, Vítor H. Xavier, José C. |
author_sort |
Abreu, José |
title |
Long-term changes in habitat and trophic level of Southern Ocean squid in relation to environmental conditions |
title_short |
Long-term changes in habitat and trophic level of Southern Ocean squid in relation to environmental conditions |
title_full |
Long-term changes in habitat and trophic level of Southern Ocean squid in relation to environmental conditions |
title_fullStr |
Long-term changes in habitat and trophic level of Southern Ocean squid in relation to environmental conditions |
title_full_unstemmed |
Long-term changes in habitat and trophic level of Southern Ocean squid in relation to environmental conditions |
title_sort |
long-term changes in habitat and trophic level of southern ocean squid in relation to environmental conditions |
publisher |
Springer Nature |
publishDate |
2020 |
url |
https://hdl.handle.net/10316/106710 https://doi.org/10.1038/s41598-020-72103-6 |
long_lat |
ENVELOPE(30.704,30.704,66.481,66.481) |
geographic |
Soi Southern Ocean |
geographic_facet |
Soi Southern Ocean |
genre |
Antarc* antarcticus Diomedea exulans Southern Ocean |
genre_facet |
Antarc* antarcticus Diomedea exulans Southern Ocean |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# UID/MAR/04292/2020 2045-2322 https://hdl.handle.net/10316/106710 doi:10.1038/s41598-020-72103-6 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41598-020-72103-6 |
container_title |
Scientific Reports |
container_volume |
10 |
container_issue |
1 |
_version_ |
1802651428314939392 |