Filters: Contacts: Adams, Layne G. (X)
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Categories: Data,
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Tags: Baseline 5-Data,
Caribou,
Denali Herd,
Species of Concern: Mammals
The fundamental niche of a species is rarely if ever realized because the presence of other species restricts it to a narrower range of ecological conditions. The effects of this narrower range of conditions define how resources are partitioned. Resource partitioning has been inferred but not demonstrated previously for sympatric ursids. We estimated assimilated diet in relation to body condition (body fat and lean and total body mass) and reproduction for sympatric brown bears (Ursus arctos) and American black bears (U. americanus) in south-central Alaska, 1998?2000. Based on isotopic analysis of blood and keratin in claws, salmon (Oncorhynchus spp.) predominated in brown bear diets (>53% annually) whereas black...
Categories: Data,
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Tags: Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna
Categories: Data,
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Tags: Baseline 5-Data,
Caribou,
Species of Concern: Mammals
available at publisher site.]
Categories: Data,
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Tags: Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna
Nutritional restrictions in winter may reduce the availability of protein for reproduction and survival in northern ungulates. We refined a technique that uses recently voided excreta on snow to assess protein status in wild caribou (Rangifer tarandus) in late winter. Our study was the first application of this non-invasive, isotopic approach to assess protein status of wild caribou by determining dietary and endogenous contributions of nitrogen (N) to urinary urea. We used isotopic ratios of N (?15N) in urine and fecal samples to estimate the proportion of urea N derived from body N (p-UN) in pregnant, adult females of the Chisana Herd, a small population that ranged across the Alaska-Yukon border. We took advantage...
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Baseline 5-Data,
Caribou,
Chisana Herd,
Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna,
North American caribou (Rangifer tarandus) herds commonly exhibit little nuclear genetic differentiation among adjacent herds, although available evidence supports strong demographic separation, even for herds with seasonal range overlap. During 1997–2003, we studied the Mentasta and Nelchina caribou herds in south-central Alaska using radiotelemetry to determine individual movements and range overlap during the breeding season, and nuclear and mitochondrial DNA (mtDNA) markers to assess levels of genetic differentiation. Although the herds were considered discrete because females calved in separate regions, individual movements and breeding-range overlap in some years provided opportunity for male-mediated gene...
Categories: Data,
Publication;
Types: Citation,
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OGC WFS Layer,
OGC WMS Layer,
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Tags: Baseline 5-Data,
Caribou,
Species of Concern: Mammals
Categories: Data,
Publication;
Types: Citation,
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Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Baseline 5-Data,
Caribou,
Denali Herd,
Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna,
Categories: Data,
Publication;
Types: Citation,
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OGC WFS Layer,
OGC WMS Layer,
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Categories: Data,
Publication;
Types: Citation,
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Tags: Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna
Categories: Data,
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Types: Citation,
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Tags: B5-Caribou,
R2b-Effects of Fire on Ecosystems
Categories: Data,
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Types: Citation,
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Tags: Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna
Categories: Data,
Publication;
Types: Citation,
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Tags: Baseline 5-Data,
Caribou,
Denali Herd,
Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna,
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna
Categories: Data,
Publication;
Types: Citation,
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Tags: Baseline 5-Baseline data,
species of concern: Moose
Categories: Data,
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Types: Citation,
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Tags: Baseline 5-Baseline Data,
Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna,
R1-Vulnerability Forest Species and Communities to Climate Change,
Species of Concern: Caribou
Categories: Data,
Publication;
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Tags: B5-Caribou,
Denali Herd,
Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna
Categories: Data,
Publication;
Types: Citation,
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Tags: Baseline 5-Data,
Caribou,
Chisana Herd,
Species of Concern: Mammals
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Baseline 5-Data,
Caribou,
Denali Herd,
Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna,
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