FN Archimer Export Format
PT J
TI Trophic ecology of northern gannets Morus bassanus highlights the extent of isotopic niche overlap with other apex predators within the Bay of Biscay
BT 
AF Gaspar, Claudia
   Giménez, Joan
   Andonegi, Eider
   Astarloa, Amaia
   Chouvelon, Tiphaine
   Franco, Javier
   Goñi, Nicolas
   Corrales, Xavier
   Spitz, Jérôme
   Bustamante, Paco
   Louzao, Maite
AS 1:1;2:2;3:1;4:1;5:3,4;6:1;7:1;8:1;9:4,5;10:6,7;11:1;
FF 1:;2:;3:;4:;5:PDG-RBE-CCEM;6:;7:;8:;9:;10:;11:;
C1 AZTI, Marine Research, Basque Research and Technology Alliance (BRTA), Herrera Kaia, Portualdea z/g, 20110, Pasaia, Spain
   Institut de Ciències del Mar (ICM-CSIC), 37-49, Passeig Marítim de la Barceloneta, 08003, Barcelona, Spain
   Ifremer, Unité Contamination Chimique Des Écosystèmes Marins (CCEM), Centre Atlantique, Rue de l’île d’Yeu, BP 21105, 44311, Nantes, France
   Observatoire Pelagis, UAR 3462 CNRS-La Rochelle Université, 5 Allées de l’Océan, 17000, La Rochelle, France
   Centre d’Etudes Biologiques de Chizé (CEBC), UMR 7372, CNRS-La Rochelle Université, 405 Route de Prissé la Charrière, 79360, Villiers-en-Bois, France
   Littoral Environnement Et Sociétés (LIENSs), UMR 7266, CNRS-La Rochelle Université, 2 rue Olympe de Gouges, 17000, La Rochelle, France
   Institut Universitaire de France (IUF), 1 rue Descartes, 75005, Paris, France
C2 AZTI, SPAIN
   ICM-CSIC, SPAIN
   IFREMER, FRANCE
   UNIV LA ROCHELLE, FRANCE
   CNRS, FRANCE
   UNIV LA ROCHELLE, FRANCE
   INST UNIV FRANCE, FRANCE
SI NANTES
SE PDG-RBE-CCEM
IN WOS Ifremer UPR
   copubli-france
   copubli-europe
   copubli-univ-france
IF 2.4
TC 3
UR https://archimer.ifremer.fr/doc/00786/89843/96011.pdf
LA English
DT Article
CR EVHOE EVALUATION HALIEUTIQUE OUEST DE L'EUROPE
   PELGAS
DE ;Marine ecology;Megafauna;Seabirds;Migration;Stable isotopes;Isotopic mixing models
AB Understanding the linkages within complex and evolving marine food webs is essential to comprehend marine ecosystem structure and dynamics. Carbon (δ13C) and nitrogen (δ15N) stable isotope signatures are recognized to be powerful descriptors of the trophic ecology and trophic relationships within marine communities. Apex predators such as seabirds can influence the structure of communities by predating in lower trophic levels. They also convey information both over a range of spatial and temporal scales due to their high mobility and longevity, respectively. For this reason, here, we studied the trophic ecology of northern gannets and the extent of niche overlap with other apex predators within the Bay of Biscay (North-East Atlantic), a key feeding area for numerous predatory species. Mixing models indicated that northern gannets fed primarily on European anchovy Engraulis encrasicolus and on a mixed group composed of European sardine Sardina pilchardus, European sprat Sprattus sprattus, juvenile hake Merluccius merluccius, Atlantic mackerel Scomber scombrus and Atlantic horse mackerel Trachurus trachurus. Within the apex predator community, the northern gannets trophic niche overlapped the most with common guillemots Uria aalge (15.58%, based on Stable Isotope Bayesian Ellipses (SIBER)) and overlapped to a lesser extent with cetacean species occupying shelf habitats (i.e., the harbour porpoise Phocoena phocoena (9.99%) and the short-beaked common dolphin Delphinus delphis (10.37%)). Overall, the overlap found was moderate indicating trophic similarities and dissimilarities between these species. Information on trophic interactions between co-existing species is necessary for holistic environmental management, particularly in areas where several megafauna species share their foraging grounds with fisheries activity. 
PY 2022
PD AUG
SO Marine Biology
SN 0025-3162
PU Springer Science and Business Media LLC
VL 169
IS 8
UT 000832686500001
DI 10.1007/s00227-022-04079-y
ID 89843
ER

EF