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In recent decades, climate change has been invoked in the apparent collapse of some of the best-known examples of cyclic and synchronous population dynamics among boreal species. Simultaneously, some studies have predicted that as species' ranges shift poleward and southern habitats fragment in response to climate change, we will lose the southern glacial refugial populations that have historically harbored species' highest genetic diversity and uniqueness. I investigated how climate change and habitat fragmentation may impact genetic and population dynamic processes for the snowshoe hare ( Lepus americanus ), a species historically recognized as a key driver of North American boreal community dynamics. I collected...
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Adaptive divergence is expected among sockeye salmon (Oncorhychus nerka) populations because they spawn in diverse habitats and experience spatially and temporally restricted gene flow. Genetic bottleneck effects are also expected among sockeye salmon populations because they are a highly structured species with excellent colonizing abilities. To test if phenotypic divergence among sockeye salmon populations is due to local adaptation or genetic drift, I compared neutral genetic and heritable phenotypic variation in spawning populations of sockeye salmon throughout the Lake Clark area of Alaska. I assessed nuclear (microsatellites and allozymes) and mitochondrial DNA variation of 15 sockeye salmon populations. Reduced...
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The North Pacific Forest Landscape Corridor and Connectivity Project utilized a landscape connectivity simulator (UNICOR) and a genetic simulation program (CDPOP) to model the functional (dispersal and genetic) connectivity in the North Pacific Landscape. The outputs from these programs indicated areas with high potential for landscape and genetic isolation and low probability of dispersal and colonization. In addition, this project was designed to provide spatially-explicit predictions of current and potential future patterns of fragmentation, prioritization of keystone corridors for protection and enhancement, and identification of places that may require habitat restoration or assisted migration to maintain viability....
Categories: Data, Project; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: 2011, AK, AK, AK, AK, All tags...
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Alluvial floodplains are unique geomorphic features of lotic systems that are characterized by a shifting morphology in three spatial dimensions. This spatial and temporal heterogeneity is thought to explain why these aquatic-terrestrial ecotones are the most species-rich habitats on the terrestrial portions of earth. Many factors and processes influencing these high levels of species richness remain unstudied, however. Regional factors, such as regional species pools, and local factors, such as groundwater-surface water exchange have received little consideration as factors controlling local species richness on floodplains. Additionally, the conservation of these habitats and the biodiversity they support remains...


    map background search result map search result map North Pacific Forest Landscape Corridor and Connectivity Project: Assessing Landscape and Species Vulnerability Floodplain plant diversity and conservation in regional and local contexts Climate change, gene flow, and the legendary synchrony of snowshoe hares Colonization and local adaptation of sockeye salmon (oncorhynchus nerka) of Lake Clark, Alaska Understanding patterns and drivers of Alaskan fire-regime variability across spatial and temporal scales Floodplain plant diversity and conservation in regional and local contexts Understanding patterns and drivers of Alaskan fire-regime variability across spatial and temporal scales Colonization and local adaptation of sockeye salmon (oncorhynchus nerka) of Lake Clark, Alaska Climate change, gene flow, and the legendary synchrony of snowshoe hares North Pacific Forest Landscape Corridor and Connectivity Project: Assessing Landscape and Species Vulnerability