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Salmon that spawn and rear in Southeast Alaska watersheds are critically important to the region’s economic vitality and cultural identity. An estimated 90% of rural households in Southeast Alaska use salmon. Environmental changes that compromise the ability of these streams to support salmon could have dramatic consequences for the region. In particular, there is concern that climate change could undermine the capacity of the region’s streams to support productive fisheries. As a result, regional stakeholders are interested in identifying some of the potential impacts of climate change on watersheds that support abundant salmon. These stakeholders include federal and state agencies (U.S. Fish and Wildlife Service,...
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The Situk River is among the most productive resource in Alaska, with nine native fish species and 10 times the density of juvenile coho salmon than any other Southeast Alaskan watershed. The associated fisheries in the Situk River and its adjoining estuary drive a $2 million economy for the community of Yakutat (population 600), with 89 percent of the households harvesting salmon for subsistence purposes. The Yakutat foreland area that encompasses the Situk River watershed is a vast landscape of low gradient drainages with forested mosaics of side channels and pools that are responsible for up to 80 percent of coho salmon production. These highly productive aquatic habitats are sensitive to even small shifts in...
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The Alaska Climate Adaptation Science Center (AK CASC) has a strong track record of working collaboratively with government entities to co-produce actionable science in areas including: high resolution dynamical and statistical downscaling, process and mechanistic-based ecosystem modeling, and glacier dynamics. The AK CASC is therefore uniquely positioned to facilitate and conduct science that informs specific management decisions within the state. The AK CASC is hosted by the University of Alaska Fairbanks (UAF) with consortium partners University of Alaska Anchorage and University of Alaska Southeast. To learn more about Host Agreement Projects and University of Alaska - Fairbanks projects, visit: https://akcasc.org/about-us/projects-overview/...
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In the Gulf of Alaska, streams will experience more dramatic low water events, interspersed with larger and potentially more frequent high flow events in the coming decades. Reduced stream flows are likely to occur due to diminished snowpack and seasonal droughts, while higher flow events are likely to occur with more frequent storms and rain-on-snow events. These changes are likely to influence the growth trajectories of juvenile salmon, such as coho salmon and chinook salmon, that live up to two years in freshwater before migrating to the ocean. Stream flows can influence juvenile salmon growth by modifying food availability, water clarity, temperature, and predation risk. This high-resolution study examines...
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Ecosystems spanning the zones from “ridge-to-reef" and “icefield-to-ocean” are home to relatively high levels of biodiversity; serve as conduits of nutrients to sensitive coastal environments; and are culturally and economically important to local communities. These systems are smaller and have unique geological and streamflow properties compared to more typical river systems and, because of this, it is not clear how they will respond to shifting climatic patterns. Both Hawaiian ridge-to-reef and Alaskan icefield-to-ocean ecosystems face the potential of climate-driven changes in extreme flow events, such as floods and droughts, that could dramatically change how critical nutrients are retained and transported....
    map background search result map search result map The Potential Impacts of Climate Change on River Food Webs and Salmon Productivity in Southeast Alaska Alaska Climate Adaptation Science Center Consortium - Hosted by the University of Alaska Fairbanks (2017-2021) The Influence of Stream Flow Patterns on Juvenile Salmon Growth in Southeast Alaska Studying the Influence of Streamflow Variability on Fish Populations to Understand Nutrient Transport in Hawaiian and Alaskan Streams in a Changing Climate Community Engagement in a Stream-network Assessment of Salmon Thermal-habitat in the Situk River Watershed of Yakutat, Alaska Community Engagement in a Stream-network Assessment of Salmon Thermal-habitat in the Situk River Watershed of Yakutat, Alaska The Potential Impacts of Climate Change on River Food Webs and Salmon Productivity in Southeast Alaska The Influence of Stream Flow Patterns on Juvenile Salmon Growth in Southeast Alaska Alaska Climate Adaptation Science Center Consortium - Hosted by the University of Alaska Fairbanks (2017-2021) Studying the Influence of Streamflow Variability on Fish Populations to Understand Nutrient Transport in Hawaiian and Alaskan Streams in a Changing Climate