A critical assessment of marine predator isoscapes within the southern Indian Ocean
BACKGROUND: Precise and accurate retrospective geolocation of marine predators via their tissues’ isotopic composition relies on quality reference maps of relevant isotopic gradients (“isoscapes”). Additionally, a good working knowledge of any discrimination factors that may offset a marine predator...
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ftpubmed:oai:pubmedcentral.nih.gov:7322845 2023-05-15T16:19:44+02:00 A critical assessment of marine predator isoscapes within the southern Indian Ocean Carpenter-Kling, Tegan Pistorius, Pierre Reisinger, Ryan Cherel, Yves Connan, Maëlle 2020-06-29 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7322845/ http://www.ncbi.nlm.nih.gov/pubmed/32612836 https://doi.org/10.1186/s40462-020-00208-8 en eng BioMed Central http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7322845/ http://www.ncbi.nlm.nih.gov/pubmed/32612836 http://dx.doi.org/10.1186/s40462-020-00208-8 © The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data. CC0 PDM CC-BY Mov Ecol Research Text 2020 ftpubmed https://doi.org/10.1186/s40462-020-00208-8 2020-07-05T00:56:50Z BACKGROUND: Precise and accurate retrospective geolocation of marine predators via their tissues’ isotopic composition relies on quality reference maps of relevant isotopic gradients (“isoscapes”). Additionally, a good working knowledge of any discrimination factors that may offset a marine predator’s isotopic composition from baseline isotopic values, as well as tissue specific retention rates, are imperative. We provide a critical assessment of inter-specific differences among marine predator-level isoscapes within the Indian Sector of the Southern Ocean. METHODS: We combined fine-scale GPS tracking data and concurrent blood plasma δ(13)C and δ(15)N values of eight seabird species (three albatross, two giant petrel and three penguin species) breeding at Marion Island to produce species- and guild-specific isoscapes. RESULTS: Overall, our study revealed latitudinal spatial gradients in both δ(13)C and δ(15)N for far-ranging seabirds (albatrosses and giant petrels) as well as inshore-offshore gradients for near-ranging seabirds (penguins). However, at the species level, latitudinal spatial gradients were not reflected in the δ(13)C and δ(15)N isoscapes of two and three, respectively, of the five far-ranging species studied. It is therefore important when possible to estimate and apply species-specific isoscapes or have a good understanding of any factors and pathways affecting marine predators’ isotopic composition when estimating the foraging distribution of marine predators via their tissues’ stable isotope compositions. CONCLUSIONS: Using a multi-species approach, we provide evidence of large and regional scale systematic spatial variability of δ(13)C and δ(15)N at the base of the marine food web that propagates through trophic levels and is reflected in the isotopic composition of top predators’ tissues. Text Giant Petrel Giant Petrels Marion Island Southern Ocean PubMed Central (PMC) Indian Southern Ocean Movement Ecology 8 1 |
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English |
topic |
Research |
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Research Carpenter-Kling, Tegan Pistorius, Pierre Reisinger, Ryan Cherel, Yves Connan, Maëlle A critical assessment of marine predator isoscapes within the southern Indian Ocean |
topic_facet |
Research |
description |
BACKGROUND: Precise and accurate retrospective geolocation of marine predators via their tissues’ isotopic composition relies on quality reference maps of relevant isotopic gradients (“isoscapes”). Additionally, a good working knowledge of any discrimination factors that may offset a marine predator’s isotopic composition from baseline isotopic values, as well as tissue specific retention rates, are imperative. We provide a critical assessment of inter-specific differences among marine predator-level isoscapes within the Indian Sector of the Southern Ocean. METHODS: We combined fine-scale GPS tracking data and concurrent blood plasma δ(13)C and δ(15)N values of eight seabird species (three albatross, two giant petrel and three penguin species) breeding at Marion Island to produce species- and guild-specific isoscapes. RESULTS: Overall, our study revealed latitudinal spatial gradients in both δ(13)C and δ(15)N for far-ranging seabirds (albatrosses and giant petrels) as well as inshore-offshore gradients for near-ranging seabirds (penguins). However, at the species level, latitudinal spatial gradients were not reflected in the δ(13)C and δ(15)N isoscapes of two and three, respectively, of the five far-ranging species studied. It is therefore important when possible to estimate and apply species-specific isoscapes or have a good understanding of any factors and pathways affecting marine predators’ isotopic composition when estimating the foraging distribution of marine predators via their tissues’ stable isotope compositions. CONCLUSIONS: Using a multi-species approach, we provide evidence of large and regional scale systematic spatial variability of δ(13)C and δ(15)N at the base of the marine food web that propagates through trophic levels and is reflected in the isotopic composition of top predators’ tissues. |
format |
Text |
author |
Carpenter-Kling, Tegan Pistorius, Pierre Reisinger, Ryan Cherel, Yves Connan, Maëlle |
author_facet |
Carpenter-Kling, Tegan Pistorius, Pierre Reisinger, Ryan Cherel, Yves Connan, Maëlle |
author_sort |
Carpenter-Kling, Tegan |
title |
A critical assessment of marine predator isoscapes within the southern Indian Ocean |
title_short |
A critical assessment of marine predator isoscapes within the southern Indian Ocean |
title_full |
A critical assessment of marine predator isoscapes within the southern Indian Ocean |
title_fullStr |
A critical assessment of marine predator isoscapes within the southern Indian Ocean |
title_full_unstemmed |
A critical assessment of marine predator isoscapes within the southern Indian Ocean |
title_sort |
critical assessment of marine predator isoscapes within the southern indian ocean |
publisher |
BioMed Central |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7322845/ http://www.ncbi.nlm.nih.gov/pubmed/32612836 https://doi.org/10.1186/s40462-020-00208-8 |
geographic |
Indian Southern Ocean |
geographic_facet |
Indian Southern Ocean |
genre |
Giant Petrel Giant Petrels Marion Island Southern Ocean |
genre_facet |
Giant Petrel Giant Petrels Marion Island Southern Ocean |
op_source |
Mov Ecol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7322845/ http://www.ncbi.nlm.nih.gov/pubmed/32612836 http://dx.doi.org/10.1186/s40462-020-00208-8 |
op_rights |
© The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data. |
op_rightsnorm |
CC0 PDM CC-BY |
op_doi |
https://doi.org/10.1186/s40462-020-00208-8 |
container_title |
Movement Ecology |
container_volume |
8 |
container_issue |
1 |
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1766006146855862272 |