BLM REA CYR 2013 Historic Total Range of Caribou Herds Occurring in the Central Yukon Study Area

Metadata Updated: November 12, 2020

Caribou are circumpolar in their distribution, occurring in arctic tundra and boreal forest regions in North America and Eurasia. They are an important prey item to apex predators, including wolves (Canis lupus) and grizzly (brown) bears (Ursus arctos), and golden eagles (Aquila chrysaetos), which primarily feeding on calves. Caribou are highly valued by sport and subsistence hunters, providing an important source of food sustaining the health and culture of northern communities. Caribou generally migrate seasonally in response to forage availability, to access calving grounds, and seek out insect refuges. Caribou calve during the summer months in treeless tundra, in the mountains or in open areas along the coast. Summer forage includes leaves of willows, sedges, flowering plants, and mushrooms, which provide energy for reproduction and lactation, body and antler growth, pelage replacement, and replenishing nutrient stores for the upcoming winter. Post-calving, caribou typically aggregate into large herds and move away from calving grounds into higher elevation habitats to decrease predation risk and escape from insects. During autumn, caribou move to lower elevations and some herds migrate long distance to access winter forage, which primarily consists of ground dwelling lichens. In Alaska there are 32 recognized herds of which twelve have ranges that overlap with, or are contained within the Central Yukon study area. A herd is defined by the repeated use of a specific calving ground. In this study we focus on ten of these herds with ranges that are wholly contained within, or have large areas of their range that overlap with the Central Yukon study. These include the Central Arctic, Fortymile, Galena Mountain, Hodzana, Macomb, Porcupine, Ray Mountains, Western Arctic, White Mountains, and Wolf Mountain herds.

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Metadata Date October 13, 2017
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) January 1, 2015 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from DOI Open Data

Additional Metadata

Resource Type Dataset
Metadata Date October 13, 2017
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) January 1, 2015 (publication)
Responsible Party Alaska Center for Conservation Science, University of Alaska Anchorage (Point of Contact)
Contact Email
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Bbox East Long -134.73093675
Bbox North Lat 71.3920252298
Bbox South Lat 61.6297547053
Bbox West Long -166.838105286
Coupled Resource
Frequency Of Update notPlanned
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Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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