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...
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Online Access: | http://hdl.handle.net/10316/101863 https://doi.org/10.3389/fmars.2018.00377 |
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ftunivcoimbra:oai:estudogeral.sib.uc.pt:10316/101863 2023-05-15T17:28:11+02:00 Stable Isotope Dynamics (δ13C and δ15N) in Neritic and Oceanic Waters of the North Atlantic Inferred From GPS-Tracked Cory’s Shearwaters Ceia, Filipe R. Cherel, Yves Paiva, Vítor Ramos, Jaime A. 2018 http://hdl.handle.net/10316/101863 https://doi.org/10.3389/fmars.2018.00377 eng eng EU INTERREG project FAME (The Future of the Atlantic Marine Environment; Project n 2009-1/089) LIFE C Berlenga (LIFE13 NAT/PT/000458) at Berlenga Island LIFE project “Safe Islands for Seabirds” (LIFE07 NAT/P/000649) at Corvo Island 2296-7745 http://hdl.handle.net/10316/101863 doi:10.3389/fmars.2018.00377 info:eu-repo/semantics/openAccess Atlantic Ocean bio-logging isoscapes isotopic patterns plasma random forest seabird top predators info:eu-repo/semantics/article 2018 ftunivcoimbra https://doi.org/10.3389/fmars.2018.00377 2022-10-04T23:59:32Z 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 d13C and d15N 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 d13C and d15N values of birds’ plasma over the region ranged from 20.2 to 16.2h, and from 10.8 to 15.5h, respectively. As expected, strong biogeographic isotopic patterns were found in d13C 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 d15N 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 d13C and d15N values were very influenced by temporal drivers, suggesting that wide-ranging top consumers are hard to trace locally. This study shows that the d13C 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 Universidade de Coimbra: Estudo Geral Frontiers in Marine Science 5 |
institution |
Open Polar |
collection |
Universidade de Coimbra: Estudo Geral |
op_collection_id |
ftunivcoimbra |
language |
English |
topic |
Atlantic Ocean bio-logging isoscapes isotopic patterns plasma random forest seabird top predators |
spellingShingle |
Atlantic Ocean bio-logging isoscapes isotopic patterns plasma random forest seabird top predators Ceia, Filipe R. Cherel, Yves Paiva, Vítor Ramos, Jaime A. 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 seabird top predators |
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 d13C and d15N 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 d13C and d15N values of birds’ plasma over the region ranged from 20.2 to 16.2h, and from 10.8 to 15.5h, respectively. As expected, strong biogeographic isotopic patterns were found in d13C 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 d15N 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 d13C and d15N values were very influenced by temporal drivers, suggesting that wide-ranging top consumers are hard to trace locally. This study shows that the d13C 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 |
Ceia, Filipe R. Cherel, Yves Paiva, Vítor Ramos, Jaime A. |
author_facet |
Ceia, Filipe R. Cherel, Yves Paiva, Vítor Ramos, Jaime A. |
author_sort |
Ceia, Filipe R. |
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 |
publishDate |
2018 |
url |
http://hdl.handle.net/10316/101863 https://doi.org/10.3389/fmars.2018.00377 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
EU INTERREG project FAME (The Future of the Atlantic Marine Environment; Project n 2009-1/089) LIFE C Berlenga (LIFE13 NAT/PT/000458) at Berlenga Island LIFE project “Safe Islands for Seabirds” (LIFE07 NAT/P/000649) at Corvo Island 2296-7745 http://hdl.handle.net/10316/101863 doi:10.3389/fmars.2018.00377 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fmars.2018.00377 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
_version_ |
1766120724755382272 |