Modeling population responses of Chinook and coho salmon to suspended sediment using a life history approach

H. Andres Araujo, Andrew B. Cooper, Erland A. MacIsaac, Duncan Knowler and Antonio Velez-Espino

Theoretical Population Biology, 2015, vol. 103, issue C, 71-83

Abstract: This study develops a quantitative framework for estimating the effects of extreme suspended-sediment events (SSC>25 mg L−1) on virtual populations of Chinook (Oncorhynchus tshawytscha) and coho (O. kisutch) salmon in a coastal watershed of British Columbia, Canada. We used a life history model coupled with a dose–response model to evaluate the populations’ responses to a set of simulated suspended sediments scenarios. Our results indicate that a linear increase in SSC produces non-linear declining trajectories in both Chinook and coho populations, but this decline was more evident for Chinook salmon despite their shorter fresh-water residence. The model presented here can provide insights into SSC impacts on population responses of salmonids and potentially assist resource managers when planning conservation or remediation strategies.

Keywords: Population dynamics; Salmonid population; Sedimentation events; Watershed; Suspended sediment concentration (search for similar items in EconPapers)
Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:eee:thpobi:v:103:y:2015:i:c:p:71-83

DOI: 10.1016/j.tpb.2015.04.003

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