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Climate and Dall Sheep Populations

Wrangell-St. Elias National Park & Preserve, Alaska, a study location for the ABoVE field campaign

A herd of Dall sheep ewes and lambs in Wrangell-St. Elias National Park & Preserve, Alaska, a study location for the ABoVE field campaign. (Photo credit: Laura Prugh)

ABoVE: Dall Sheep Lamb Recruitment and Climate Data, Alaska and NW Canada, 2000-2015

This dataset contains estimated annual average Dall sheep (Ovis dalli dalli) lamb-to-ewe ratios for each year from 2000-2015 across the full species range in Alaska and Northwestern Canada. Sheep population data are from surveys conducted over the 14 major mountain ranges encompassing the range of Dall sheep and variation in local climate. Also provided are data used to examine the relationship between environmental conditions and Dall sheep population performance.

The Arctic-Boreal Vulnerability Experiment (ABoVE) is a NASA Terrestrial Ecology Program field campaign based in Alaska and western Canada between 2016 and 2021.
See all data from ABoVE.

Data Citation: van de Kerk, M., D. Verbyla, A.W. Nolin, K.J. Sivy, and L.R. Prugh. 2018. ABoVE: Dall Sheep Lamb Recruitment and Climate Data, Alaska and NW Canada, 2000-2015. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1640
Data Center: ORNL DAAC
Sponsor: EOSDIS