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Sedimentary Legacy Of Sockeye Salmon (Oncorhynchus Nerka) And Climate Change In An Ultra-Oligotrophic, Glacially-Turbid British Columbia Nursery Lake, Aaron C. Hill

Graduate Student Theses, Dissertations, & Professional Papers

Anadromous Pacific salmon (Oncorhynchus spp.) populations are strongly regulated by climatic regimes and human activities across numerous spatial and temporal scales. The carcasses of adults returning to spawn provide important marine derived nutrients (MDN) to freshwater and terrestrial ecosystems through multiple trophic pathways. Sockeye salmon (O. nerka) rear extensively in lakes and recent studies of sockeye nursery lake sediments in Alaska have used indicators of spawner density (ä15N) and algal production (fossil pigments and diatoms) to show that lake trophic status is often regulated by climate and harvest via MDN from adult spawners. However, the strength of these controls and …