Ecological bridges and barriers in pelagic ecosystems

Type Article
Date 2017-06
Language English
Author(s) Briscoe Dana K.1, Hobday Alistair J.2, Carlisle Aaron1, Scales Kylie3, Eveson J. Paige2, Arrizabalaga Haritz4, Druon Jean Noel5, Fromentin Jean-MarcORCID6
Affiliation(s) 1 : Stanford Univ, Hopkins Marine Stn, Pacific Grove, CA 93950 USA.
2 : CSIRO Oceans & Atmosphere, Hobart, Tas 7000, Australia.
3 : NOAA, Environm Res Div, Southwest Fisheries Sci Ctr, Monterey, CA 93940 USA.
4 : AZTI, Marine Res Div, Pasaia 20110, Basque Country, Spain.
5 : European Commiss, Joint Res Ctr, Inst Protect & Secur Citizen, Maritime Affairs Unit, Via Enrico Fermi 1, I-21027 Ispra, VA, Italy.
6 : IFREMER, UMR MARBEC Marine Biodivers Exploitat & Conservat, Ave Jean Monnet,CS 30171, F-34203 Sete, France.
Source Deep-sea Research Part Ii-topical Studies In Oceanography (0967-0645) (Pergamon-elsevier Science Ltd), 2017-06 , Vol. 140 , P. 182-192
DOI 10.1016/j.dsr2.2016.11.004
WOS© Times Cited 31
Keyword(s) Species distribution, Migration corridors, Population connectivity, Oceanographic features, Tuna, Billfish, Marine mammal, Brazilian episode
Abstract Many highly mobile species are known to use persistent pathways or corridors to move between habitat patches in which conditions are favorable for particular activities, such as breeding or foraging. In the marine realm, environmental variability can lead to the development of temporary periods of anomalous oceanographic conditions that can connect individuals to areas of habitat outside a population's usual range, or alternatively, restrict individuals from areas usually within their range, thus acting as ecological bridges or ecological barriers. These temporary features can result in novel or irregular trophic interactions and changes in population spatial dynamics, and, therefore, may have significant implications for management of marine ecosystems. Here, we provide evidence of ecological bridges and barriers in different ocean regions, drawing upon five case studies in which particular oceanographic conditions have facilitated or restricted the movements of individuals from highly migratory species. We discuss the potential population-level significance of ecological bridges and barriers, with respect to the life history characteristics of different species, and inter- and intra-population variability in habitat use. Finally, we summarize the persistence of bridge dynamics with time, our ability to monitor bridges and barriers in a changing climate, and implications for forecasting future climate-mediated ecosystem change.
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Briscoe Dana K., Hobday Alistair J., Carlisle Aaron, Scales Kylie, Eveson J. Paige, Arrizabalaga Haritz, Druon Jean Noel, Fromentin Jean-Marc (2017). Ecological bridges and barriers in pelagic ecosystems. Deep-sea Research Part Ii-topical Studies In Oceanography, 140, 182-192. Publisher's official version : https://doi.org/10.1016/j.dsr2.2016.11.004 , Open Access version : https://archimer.ifremer.fr/doc/00358/46962/