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Transhemispheric ecosystem disservices of pink salmon in a Pacific Ocean macrosystem


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Springer, AM, van Vliet, GB, Bool, NM, Crowley, M, Fullagar, P, Lea, MA ORCID: 0000-0001-8318-9299, Monash, R, Price, C, Vertigan, C and Woehler, EJ ORCID: 0000-0002-1125-0748 2018 , 'Transhemispheric ecosystem disservices of pink salmon in a Pacific Ocean macrosystem' , Proceedings of the National Academy of Sciences of The United States of America, vol. 115, no. 22 , pp. 5038-5045 , doi: 10.1073/pnas.1720577115.

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Pink salmon (Oncorhynchus gorbuscha) in the North Pacific Ocean have flourished since the 1970s, with growth in wild populations augmented by rising hatchery production. As their abundance has grown, so too has evidence that they are having important effects on other species and on ocean ecosystems. In alternating years of high abundance, they can initiate pelagic trophic cascades in the northern North Pacific Ocean and Bering Sea and depress the availability of common prey resources of other species of salmon, resident seabirds, and other pelagic species. We now propose that the geographic scale of ecosystem disservices of pink salmon is far greater due to a 15,000-kilometer transhemispheric teleconnection in a Pacific Ocean macrosystem maintained by short-tailed shearwaters (Ardenna tenuirostris), seabirds that migrate annually between their nesting grounds in the South Pacific Ocean and wintering grounds in the North Pacific Ocean. Over this century, the frequency and magnitude of mass mortalities of shearwaters as they arrive in Australia, and their abundance and productivity, have been related to the abundance of pink salmon. This has influenced human social, economic, and cultural traditions there, and has the potential to alter the role shearwaters play in insular terrestrial ecology. We can view the unique biennial pulses of pink salmon as a large, replicated, natural experiment that offers basin-scale opportunities to better learn how these ecosystems function. By exploring trophic interaction chains driven by pink salmon, we may achieve a deeper conservation conscientiousness for these northern open oceans.

Item Type: Article
Authors/Creators:Springer, AM and van Vliet, GB and Bool, NM and Crowley, M and Fullagar, P and Lea, MA and Monash, R and Price, C and Vertigan, C and Woehler, EJ
Keywords: shearwater, transhemispheric, ecosystem, North Pacific, teleconnection, short-tailed shearwater, carryover effect, interaction chain, ecosystem management
Journal or Publication Title: Proceedings of the National Academy of Sciences of The United States of America
Publisher: Natl Acad Sciences
ISSN: 0027-8424
DOI / ID Number: 10.1073/pnas.1720577115
Copyright Information:

Copyright the Authors 2018. Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

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