Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions
Quillfeldt P, Masello J. Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions. BMC Ecology . 2020;20(1): 21. **Background** While nitrogen and carbon stable isotope values can reflect ecological segregation, prey choice and spatial distr...
Published in: | BMC Ecology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer Science and Business Media LLC
2020
|
Subjects: | |
Online Access: | https://pub.uni-bielefeld.de/record/2984162 |
id |
ftubbiepub:oai:pub.uni-bielefeld.de:2984162 |
---|---|
record_format |
openpolar |
spelling |
ftubbiepub:oai:pub.uni-bielefeld.de:2984162 2024-09-15T17:45:25+00:00 Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions Quillfeldt, Petra Masello, Juan 2020 https://pub.uni-bielefeld.de/record/2984162 eng eng Springer Science and Business Media LLC info:eu-repo/semantics/altIdentifier/doi/10.1186/s12898-020-00288-5 info:eu-repo/semantics/altIdentifier/issn/1472-6785 https://pub.uni-bielefeld.de/record/2984162 https://creativecommons.org/licenses/by/4.0/ http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article doc-type:article text 2020 ftubbiepub https://doi.org/10.1186/s12898-020-00288-5 2024-07-09T23:40:29Z Quillfeldt P, Masello J. Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions. BMC Ecology . 2020;20(1): 21. **Background** While nitrogen and carbon stable isotope values can reflect ecological segregation, prey choice and spatial distribution in seabirds, the interpretation of bulk stable isotope values is frequently hampered by a lack of isotopic baseline data. In this study, we used compound-specific isotope analyses of amino acids (CSIA-AA) to overcome this constraint and to study interspecific differences, seasonal and historical changes in trophic positions of five seabird species, three penguins and two petrels, from a sub-Antarctic seabird community. **Results** CSIA-AA allowed comparing trophic positions of seabirds with temperate and polar distributions. Gentoo and Magellanic penguins had the highest trophic positions during the breeding season (3.7 and 3.9), but decreased these (2.9 and 3.3) during the feed-up for moult. Intra-specific differences were also detected in Thin-billed prions, where carbon isotope values clearly separated individuals with polar and temperate distributions, both in the breeding and interbreeding periods. Thin-billed prions that foraged in polar waters had lower trophic positions (3.2) than conspecifics foraging in temperate waters (3.8). We further investigated historical changes by comparing museum samples with samples collected recently. Our pilot study suggests that Rockhopper penguins, Magellanic penguins and Thin-billed prions with temperate non-breeding distributions had retained their trophic levels over a 90–100 year period, while Gentoo penguins and Thin-billed prions with polar non-breeding distributions had decreased trophic levels compared to historical samples. In contrast, Wilson’s storm-petrels had slightly increased trophic levels compared to samples taken in 1924–1930. **Conclusions** We applied compound-specific stable isotope analyses across a range of contexts, from intra-specific ... Article in Journal/Newspaper Antarc* Antarctic PUB - Publications at Bielefeld University BMC Ecology 20 1 |
institution |
Open Polar |
collection |
PUB - Publications at Bielefeld University |
op_collection_id |
ftubbiepub |
language |
English |
description |
Quillfeldt P, Masello J. Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions. BMC Ecology . 2020;20(1): 21. **Background** While nitrogen and carbon stable isotope values can reflect ecological segregation, prey choice and spatial distribution in seabirds, the interpretation of bulk stable isotope values is frequently hampered by a lack of isotopic baseline data. In this study, we used compound-specific isotope analyses of amino acids (CSIA-AA) to overcome this constraint and to study interspecific differences, seasonal and historical changes in trophic positions of five seabird species, three penguins and two petrels, from a sub-Antarctic seabird community. **Results** CSIA-AA allowed comparing trophic positions of seabirds with temperate and polar distributions. Gentoo and Magellanic penguins had the highest trophic positions during the breeding season (3.7 and 3.9), but decreased these (2.9 and 3.3) during the feed-up for moult. Intra-specific differences were also detected in Thin-billed prions, where carbon isotope values clearly separated individuals with polar and temperate distributions, both in the breeding and interbreeding periods. Thin-billed prions that foraged in polar waters had lower trophic positions (3.2) than conspecifics foraging in temperate waters (3.8). We further investigated historical changes by comparing museum samples with samples collected recently. Our pilot study suggests that Rockhopper penguins, Magellanic penguins and Thin-billed prions with temperate non-breeding distributions had retained their trophic levels over a 90–100 year period, while Gentoo penguins and Thin-billed prions with polar non-breeding distributions had decreased trophic levels compared to historical samples. In contrast, Wilson’s storm-petrels had slightly increased trophic levels compared to samples taken in 1924–1930. **Conclusions** We applied compound-specific stable isotope analyses across a range of contexts, from intra-specific ... |
format |
Article in Journal/Newspaper |
author |
Quillfeldt, Petra Masello, Juan |
spellingShingle |
Quillfeldt, Petra Masello, Juan Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions |
author_facet |
Quillfeldt, Petra Masello, Juan |
author_sort |
Quillfeldt, Petra |
title |
Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions |
title_short |
Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions |
title_full |
Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions |
title_fullStr |
Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions |
title_full_unstemmed |
Compound-specific stable isotope analyses in Falkland Islands seabirds reveal seasonal changes in trophic positions |
title_sort |
compound-specific stable isotope analyses in falkland islands seabirds reveal seasonal changes in trophic positions |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
https://pub.uni-bielefeld.de/record/2984162 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1186/s12898-020-00288-5 info:eu-repo/semantics/altIdentifier/issn/1472-6785 https://pub.uni-bielefeld.de/record/2984162 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1186/s12898-020-00288-5 |
container_title |
BMC Ecology |
container_volume |
20 |
container_issue |
1 |
_version_ |
1810493238398681088 |