Biology 2483A Lecture : Ecology 2.docx

• School: Western University
• Department: Biology
• Course: Biology 2483A
• Professor: Mark Moscicki

Document Summary

Climatic variation & salmon abundance: a case study. They are born in streams and then they move out into the oceans where they spend the majority of their lives. They then return to the streams to lay their eggs. Successful reproduction depends on the health of the streams in which they spawn. Therefore, damn construction, sediment from logging operations, overharvesting and water pollution may be blamed for the salmon declines. A 1994 study claimed that the real problem is in the oceans, where salmon spend the majority of their lives. Fish harvest records were studied, and it was found that there were periods of high and low production associated with climate variation in the north pacific. The nature and cause of these climate shifts is unclear. It was also found that high salmon production in alaska corresponded to low salmon production in oregon & washington. Correlation between salmon production shifts and changes in sea surface temperatures in the.