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Point locations for collections of Michigan fish in the Lake Michigan basin.
Abstract The distribution and future fate of ectothermic organisms in a warming world will be dictated by thermalscapes across landscapes. That is particularly true for stream fishes and cold-water species like trout, salmon, and char that are already constrained to high elevations and latitudes. The extreme climates in those environments also preclude invasions by most non-native species, so identifying especially cold habitats capable of absorbing future climate change while still supporting native populations would highlight important refugia. By coupling crowd-sourced biological datasets with high-resolution stream temperature scenarios, we delineate network refugia across >250 000 stream km in the Northern...
Categories: Publication;
Types: Citation;
Tags: bull trout,
climate change,
cutthroat trout,
invasive species,
refugia,
Point locations for collections of Michigan fish in the Lake Michigan basin.
Climate change is a global phenomenon, but natural selection occurs within landscapes. Many global analyses predict how climate change will shape behavior and physiology, but few incorporate information from the landscape scales at which animals actually respond to selective pressure. We compared cold-water fish (redband trout Oncorhynchus mykiss newberrii) from neighboring habitats in a naturally warm, recently fragmented basin to understand how different responses to warming may arise from landscape constraints. Trout in warm, hydrologically connected Upper Klamath Lake fled summer temperatures and sought refuge in cool tributaries, while trout in an equally warm but fragmented reach of the Klamath River endured...
Categories: Publication;
Types: Citation;
Tags: Adaptation,
Climate Change,
Conservation,
Cost-Benefit Model,
Landscape,
California has developed a watershed delineation scheme, CALWATER 2.2, based on the State Water Resources Control Board planning watershed numbering scheme. The planning watersheds are similar in size to 6th field HUs and were used in this analysis. The watersheds that cross the California/Oregon boundaries were extended into Oregon by on-screen digitizing in ArcMap following the ridgelines on the 30m digital elevation models (DEM). The full report and other datasets from the Preliminary Aquatic Integrity Assessment for the Lower/Middle Klamath River and the Upper Sacramento River can be found in the gallery at: http://app.databasin.org/app/pages/galleryPage.jsp?id=c0b34c4e1f7c405fab4829d4fd56b36d
Point locations for collections of Michigan fish in the Lake Michigan basin.
Abstract (from http://onlinelibrary.wiley.com/doi/10.1111/gcb.12850/abstract): Understanding how climatic variation influences ecological and evolutionary processes is crucial for informed conservation decision-making. Nevertheless, few studies have measured how climatic variation influences genetic diversity within populations or how genetic diversity is distributed across space relative to future climatic stress. Here, we tested whether patterns of genetic diversity (allelic richness) were related to climatic variation and habitat features in 130 bull trout ( Salvelinus confluentus) populations from 24 watersheds (i.e., ~4–7th order river subbasins) across the Columbia River Basin, USA. We then determined whether...
Categories: Publication;
Types: Citation;
Tags: Fish,
Northwest CASC,
Rivers, Streams and Lakes,
Water, Coasts and Ice,
Wildlife and Plants,
Field measurements of riverbed grain size were collected from the Merced and Tuolumne Rivers in California to support research on anadromous salmonids. The grain size estimates included in this dataset were obtained from plan-view digital images of grains on exposed gravel and cobble bars (n = 109 for the Merced, n = 26 for the Tuolumne). The images were used to estimate grain-size distributions using the algorithm of Buscombe (2013). In this dataset we report the median grain size (D50), the 16th percentile (D16) and 84th percentile (D84). The spatial location of each measurement was obtained via a Trimble R10 RTK GPS receiver. The map projection and datum for these data from the Merced River are UTM Zone 11 N...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service,
Shapefile;
Tags: California,
California,
Merced River,
Steelhead,
Tuolumne River,
Point locations for collections of Michigan fish in the Lake Michigan basin.
Species occurrence data were obtained from the Atlas of Spawning and Nursery Areas of Great Lakes Fishes (Goodyear et al. 1982). The atlas contains information on all of the commercially and recreationally important species that use the tributaries, littoral and open-water areas of the Great Lakes as spawning and nursery habitats. Close to 9500 geo-referenced data records (occurrences of fish species) were imported into ArcView GIS. The 139 fish taxa reported in the Atlas had to be grouped into fewer broad categories to produce meaningful distribution maps. We chose three functional classification schemes. Jude and Pappas (1992) used Correspondence Analysis to partition fish species associated with the open water...
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