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

作者：Araujo H Andres^*; Cooper Andrew B; MacIsaac Erland A; Knowler Duncan; Velez Espino Antonio

来源：Theoretical Population Biology, 2015, 103: 71-83.

DOI：10.1016/j.tpb.2015.04.003

• Population dynamics
• Salmonid population
• Sedimentation events
• Watershed
• Suspended sediment concentration

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 salmoriids and potentially assist resource managers when planning conservation or remediation strategies.

• 出版日期2015-8