Stable Isotope Dynamics (δ13C and δ15N) in Neritic and Oceanic Waters of the North Atlantic Inferred From GPS-Tracked Cory’s Shearwaters
Intrinsic markers, such as stable isotopes, are a powerful approach to trace wildlife movements because they do not require initial marking of the organism. The main limitation of the isotopic method is the lack of knowledge in spatio-temporal patterns and dynamics of stable isotopes in marine envir...
Published in: | Frontiers in Marine Science |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Media S.A.
2018
|
Subjects: | |
Online Access: | https://doi.org/10.3389/fmars.2018.00377 https://doaj.org/article/0625177619ec4862a54beafece6d4947 |
id |
ftdoajarticles:oai:doaj.org/article:0625177619ec4862a54beafece6d4947 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:0625177619ec4862a54beafece6d4947 2023-05-15T17:28:12+02:00 Stable Isotope Dynamics (δ13C and δ15N) in Neritic and Oceanic Waters of the North Atlantic Inferred From GPS-Tracked Cory’s Shearwaters Filipe R. Ceia Yves Cherel Vitor H. Paiva Jaime A. Ramos 2018-10-01T00:00:00Z https://doi.org/10.3389/fmars.2018.00377 https://doaj.org/article/0625177619ec4862a54beafece6d4947 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2018.00377/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2018.00377 https://doaj.org/article/0625177619ec4862a54beafece6d4947 Frontiers in Marine Science, Vol 5 (2018) Atlantic Ocean bio-logging isoscapes isotopic patterns plasma random forest Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2018 ftdoajarticles https://doi.org/10.3389/fmars.2018.00377 2022-12-31T12:16:41Z Intrinsic markers, such as stable isotopes, are a powerful approach to trace wildlife movements because they do not require initial marking of the organism. The main limitation of the isotopic method is the lack of knowledge in spatio-temporal patterns and dynamics of stable isotopes in marine environments, especially at local scales. Here, we combine GPS-tracks and isotopic signatures from Cory’s shearwaters as a model species to define isoscapes in the North Atlantic, and assess δ13C and δ15N dynamics, from local to regional spatial scales. Tracking data and blood samples were collected seasonally (during pre-laying and chick-rearing periods) across 6 years (2010–2015) from a total of 191 birds breeding at both neritic and oceanic environments. Tracked birds encompassed a large latitudinal and longitudinal area of the mid-North Atlantic, from the Eastern to Central North Atlantic. Overall, the δ13C and δ15N values of birds’ plasma over the region ranged from -20.2 to -16.2‰, and from 10.8 to 15.5‰, respectively. As expected, strong biogeographic isotopic patterns were found in δ13C values at a regional scale, mostly driven by an inshore/offshore gradient and chlorophyll a concentration. Although a moderate expression of spatial isotopic gradients on δ15N values (i.e., latitudinal and inshore/offshore) in the whole region, these were primarily influenced by temporal drivers (i.e., annual variability). At a local scale (i.e., in a radius of 100 km around the colony, within the neritic environment), both δ13C and δ15N values were very influenced by temporal drivers, suggesting that wide-ranging top consumers are hard to trace locally. This study shows that the δ13C values of marine top consumers are good indicators of the foraging habitat at a regional scale in the mid-North Atlantic, especially in terms of inshore/offshore gradients and areas of higher productivity. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 5 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Atlantic Ocean bio-logging isoscapes isotopic patterns plasma random forest Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Atlantic Ocean bio-logging isoscapes isotopic patterns plasma random forest Science Q General. Including nature conservation geographical distribution QH1-199.5 Filipe R. Ceia Yves Cherel Vitor H. Paiva Jaime A. Ramos Stable Isotope Dynamics (δ13C and δ15N) in Neritic and Oceanic Waters of the North Atlantic Inferred From GPS-Tracked Cory’s Shearwaters |
topic_facet |
Atlantic Ocean bio-logging isoscapes isotopic patterns plasma random forest Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Intrinsic markers, such as stable isotopes, are a powerful approach to trace wildlife movements because they do not require initial marking of the organism. The main limitation of the isotopic method is the lack of knowledge in spatio-temporal patterns and dynamics of stable isotopes in marine environments, especially at local scales. Here, we combine GPS-tracks and isotopic signatures from Cory’s shearwaters as a model species to define isoscapes in the North Atlantic, and assess δ13C and δ15N dynamics, from local to regional spatial scales. Tracking data and blood samples were collected seasonally (during pre-laying and chick-rearing periods) across 6 years (2010–2015) from a total of 191 birds breeding at both neritic and oceanic environments. Tracked birds encompassed a large latitudinal and longitudinal area of the mid-North Atlantic, from the Eastern to Central North Atlantic. Overall, the δ13C and δ15N values of birds’ plasma over the region ranged from -20.2 to -16.2‰, and from 10.8 to 15.5‰, respectively. As expected, strong biogeographic isotopic patterns were found in δ13C values at a regional scale, mostly driven by an inshore/offshore gradient and chlorophyll a concentration. Although a moderate expression of spatial isotopic gradients on δ15N values (i.e., latitudinal and inshore/offshore) in the whole region, these were primarily influenced by temporal drivers (i.e., annual variability). At a local scale (i.e., in a radius of 100 km around the colony, within the neritic environment), both δ13C and δ15N values were very influenced by temporal drivers, suggesting that wide-ranging top consumers are hard to trace locally. This study shows that the δ13C values of marine top consumers are good indicators of the foraging habitat at a regional scale in the mid-North Atlantic, especially in terms of inshore/offshore gradients and areas of higher productivity. |
format |
Article in Journal/Newspaper |
author |
Filipe R. Ceia Yves Cherel Vitor H. Paiva Jaime A. Ramos |
author_facet |
Filipe R. Ceia Yves Cherel Vitor H. Paiva Jaime A. Ramos |
author_sort |
Filipe R. Ceia |
title |
Stable Isotope Dynamics (δ13C and δ15N) in Neritic and Oceanic Waters of the North Atlantic Inferred From GPS-Tracked Cory’s Shearwaters |
title_short |
Stable Isotope Dynamics (δ13C and δ15N) in Neritic and Oceanic Waters of the North Atlantic Inferred From GPS-Tracked Cory’s Shearwaters |
title_full |
Stable Isotope Dynamics (δ13C and δ15N) in Neritic and Oceanic Waters of the North Atlantic Inferred From GPS-Tracked Cory’s Shearwaters |
title_fullStr |
Stable Isotope Dynamics (δ13C and δ15N) in Neritic and Oceanic Waters of the North Atlantic Inferred From GPS-Tracked Cory’s Shearwaters |
title_full_unstemmed |
Stable Isotope Dynamics (δ13C and δ15N) in Neritic and Oceanic Waters of the North Atlantic Inferred From GPS-Tracked Cory’s Shearwaters |
title_sort |
stable isotope dynamics (δ13c and δ15n) in neritic and oceanic waters of the north atlantic inferred from gps-tracked cory’s shearwaters |
publisher |
Frontiers Media S.A. |
publishDate |
2018 |
url |
https://doi.org/10.3389/fmars.2018.00377 https://doaj.org/article/0625177619ec4862a54beafece6d4947 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Frontiers in Marine Science, Vol 5 (2018) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2018.00377/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2018.00377 https://doaj.org/article/0625177619ec4862a54beafece6d4947 |
op_doi |
https://doi.org/10.3389/fmars.2018.00377 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
_version_ |
1766120734533353472 |