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Viable sockeye salmon populations are critical to the economy, culture, and freshwater ecosystems of Bristol Bay in Western Alaska, and it is unclear how populations might respond to warming temperatures during the critical life history stages of spawning and embryo incubation. The overarching goal of the project is to understand how temperature might influence population-specific patterns of embryo incubation, timing of hatching and fry emergence, and sockeye salmon embryo survival. By combining analyses of data from two large lake systems in the Kvichak watershed, laboratory rearing experiments to elucidate functional relationships, and simulation modeling, this project quantifies biological responses to changing...
This project will assess impacts of climate change on stream resources by considering the role of thermal heterogeneity and altered hydrologic regimes. The project will look at streams in Washington, Oregon, and California to develop a case study that stream stewards and conservation planners can use to assess vulnerability for Pacific salmon.Successful adaptation strategies for freshwater biota will consider how spatial patterns in water temperature may respond to climate change. Using remotely sensed spatially continuous maximum water temperature data for~ 30 large rivers throughout the lower portion of the NPLCC, we will map locations of cold water patches, identify potential hydroclimatic and landscape drivers,...
Categories: Data,
Project;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 2014,
Academics & scientific researchers,
Anadromous fish,
Applications and Tools,
California,
This report is structured around the specific objectives in the format of three stand-alone manuscripts that are in the process of submission to peer-reviewed journals. The first manuscript includes objectives 1-2, the second manuscript addresses objective 3, and the final manuscript objective 4. The overarching goal of the proposal was to understand how both recently experienced and projected water temperatures might influence population-specific patterns of embryo incubation, timing of hatching and fry emergence, and survival of sockeye salmon embryos. Additionally, we sought to explore the potential for adaptation in a heritable threshold life history trait that shapes whether an individual migrates to the ocean...
An important unresolved question is how populations of coldwater-dependent fishes will respond to rapidly warming water temperatures. For example, the culturally and economically important group, Pacific salmon (Oncorhynchus spp.), experience site-specific thermal regimes during early development that could be disrupted by warming. To test for thermal local adaptation and heritable phenotypic plasticity in Pacific salmon embryos, we measured the developmental rate, survival, and body size at hatching in two populations of sockeye salmon (Oncorhynchus nerka) that overlap in timing of spawning but incubate in contrasting natural thermal regimes. Using a split half-sibling design, we exposed embryos of 10 families...
This project will assess impacts of climate change on stream resources by considering the role of thermal heterogeneity and altered hydrologic regimes. The project will look at streams in Washington, Oregon, and California to develop a case study that stream stewards and conservation planners can use to assess vulnerability for Pacific salmon. Successful adaptation strategies for freshwater biota will consider how spatial patterns in water temperature may respond to climate change. Using remotely sensed spatially continuous maximum water temperature data for~ 30 large rivers throughout the lower portion of the NPLCC, we will map locations of cold water patches, identify potential hydroclimatic and landscape drivers,...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Academics & scientific researchers,
Anadromous fish,
California,
Climate Change,
Conservation Planning,
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