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Biotic and abiotic factors influencing forage fish and pelagic nekton community in the Columbia River plume (USA) throughout the upwelling season 1999–2009

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Title Biotic and abiotic factors influencing forage fish and pelagic nekton community in the Columbia River plume (USA) throughout the upwelling season 1999–2009
Names Litz, Marisa N. C. (creator)
Emmett, Robert L. (creator)
Bentley, Paul J. (creator)
Claiborne, Andrew M. (creator)
Barceló, Caren (creator)
Date Issued 2014-01 (iso8601)
Note To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The article is copyrighted by the International Council for the Exploration of the Sea and published by Oxford University Press. It can be found at: http://icesjms.oxfordjournals.org/.
Abstract Large river plumes modify coastal environments and can impact production across multiple trophic levels. From 1999 to 2009, the
assemblages of forage fish, predator fish, and other pelagic nekton were monitored in coastal waters associated with the Columbia
River plume. Surveys were conducted at night to target vertically migrating species, and community structure evaluated to better
understand ecological interactions. Distinct inshore and offshore communities were identified during spring and summer that were
correlated with ocean temperature, salinity, plume volume, and upwelling intensity. Resident euryhaline forage fish species, such as
smelts, anchovy, herring, market squid, juvenile salmon, and spiny dogfish, showed a high affinity for inshore habitat and the lower
salinity plume during spring. Highly migratory species, such as sardine, piscivorous hake, sharks, and mackerels, were associated with
warmer, saltier waters offshore, during strong upwelling periods in summer. Overall, our study of pelagic nekton revealed that temporal
dynamics in abundance and community composition were associated with seasonal abiotic phenomenon, but not interannual, large-scale
oceanographic processes. Forage fish assemblages differed seasonally and spatially from the assemblages of major piscivorous predators.
This finding suggests a potential role of the plume as refuge for forage fish from predation by piscivorous fish in the northern
California Current.
Genre Article
Topic California current
Identifier Litz, M. N., Emmett, R. L., Bentley, P. J., Claiborne, A. M., & Barceló, C. (2014). Biotic and abiotic factors influencing forage fish and pelagic nekton community in the Columbia River plume (USA) throughout the upwelling season 1999–2009. International Council for the Exploration of the Sea Journal of Marine Science: Journal du Conseil, 71(1), 5-18. doi:10.1093/icesjms/fst082

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