Successful Long-Distance Breeding Range Expansion of a Top Marine Predator

Type Article
Date 2021-05
Language English
Author(s) Henry Robert William1, Shaffer Scott A.2, Antolos Michelle1, Félix-Lizárraga María3, Foley David G.4, Hazen Elliott L.4, Tremblay Yann5, Costa Daniel P.1, Tershy Bernie R.1, Croll Donald A.1
Affiliation(s) 1 : Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, Santa Cruz, CA, United States
2 : San Jose State University, Department of Biological Sciences, San Jose, CA, United States
3 : Grupo de Ecología y Conservación de Islas, Ensenada, Mexico
4 : NOAA Southwest Fisheries Science Center, Environmental Research Division, Monterey, CA, United States
5 : UMR 248 MARBEC (IRD – IFREMER – CNRS – Univ. Montpellier), Sète, France
Source Frontiers In Ecology And Evolution (2296-701X) (Frontiers Media SA), 2021-05 , Vol. 9 , P. 620103 (16p.)
DOI 10.3389/fevo.2021.620103
Keyword(s) biogeography, colonization, North Pacific, climate change, albatross, top marine predator, range expansion
Abstract

Little is known about the effects of large-scale breeding range expansions on the ecology of top marine predators. We examined the effects of a recent range expansion on the breeding and foraging ecology of Laysan albatrosses (Phoebastria immutabilis). Laysan albatrosses expanded from historical breeding colonies in the Central Pacific Ocean to the Eastern Pacific Ocean around central Baja California, Mexico, leading to a 4,000-km shift from colonies located adjacent to the productive transition zone in the Central Pacific to colonies embedded within the eastern boundary current upwelling system of the Eastern Pacific California Current. We use electronic tagging and remote sensing data to examine the consequences of this range expansion on at-sea distribution, habitat use, foraging habitat characteristics, and foraging behavior at sea by comparing birds from historic and nascent colonies. We found the expansion resulted in distinct at-sea segregation and differential access to novel oceanographic habitats. Birds from the new Eastern Pacific colony on Guadalupe Island, Mexico have reduced ranges, foraging trip lengths and durations, and spend more time on the water compared to birds breeding in the Central Pacific on Tern Island, United States. Impacts of the range expansion to the post-breeding season were less pronounced where birds maintained some at-sea segregation but utilized similar habitat and environmental variables. These differences have likely benefited the Eastern Pacific colony which has significantly greater reproductive output and population growth rates. Laysan albatrosses have the plasticity to adapt to distinctly different oceanographic habitats and also provide insight on the potential consequences of range shifts to marine organisms.

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Henry Robert William, Shaffer Scott A., Antolos Michelle, Félix-Lizárraga María, Foley David G., Hazen Elliott L., Tremblay Yann, Costa Daniel P., Tershy Bernie R., Croll Donald A. (2021). Successful Long-Distance Breeding Range Expansion of a Top Marine Predator. Frontiers In Ecology And Evolution, 9, 620103 (16p.). Publisher's official version : https://doi.org/10.3389/fevo.2021.620103 , Open Access version : https://archimer.ifremer.fr/doc/00697/80857/