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. For this study, the mountain ranges were divided into 24 mountain units due to differing climate gradients. Estimated covariate environmental and climate data used to examine the relationship between environmental conditions and Dall sheep population performance (per mountain unit) are also provided and include precipitation, temperature, snow cover, elevation, and distance to the center of the range.

Data and Resources

Field Value
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
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
graphic-preview-description A herd of Dall sheep ewes and lambs are dwarfed by the mountainous landscape in Wrangell St. Elias National Park, Alaska, March 2017. Photo credit: Laura Prugh.
graphic-preview-file https://daac.ornl.gov/ABOVE/guides/Dall_Sheep_Population_Dynamics_Fig1.jpg
identifier C1568168436-ORNL_DAAC
issued 2018-11-01
landingPage https://doi.org/10.3334/ORNLDAAC/1640
language {en-US}
metadata_type geospatial
modified 2019-04-15
programCode {026:001}
publisher ORNL_DAAC
resource-type Dataset
source_datajson_identifier true
source_hash 3469f855c2e457fb03ac98fce2f8900742b730d2
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-163.28, 59.6], [-123.55, 59.6], [-123.55, 69.71], [-163.28, 69.71], [-163.28, 59.6]]]}
temporal 2000-01-01T00:00:00Z/2015-12-31T23:59:59Z
theme {ABoVE,geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • animals-vertebrates
  • atmosphere
  • atmospheric-temperature
  • biological-classification
  • biosphere
  • biospheric-indicators
  • ckan
  • climate-indicators
  • earth-science
  • ecological-dynamics
  • geo
  • geoss
  • national
  • national-geospatial-data-asset
  • ngda
  • north-america
  • precipitation
  • snow-ice
  • terrestrial-hydrosphere
  • united-states
isopen False
license_id notspecified
license_title License not specified
maintainer undefined
maintainer_email uso@daac.ornl.gov
metadata_created 2025-11-22T17:07:19.220698
metadata_modified 2025-11-22T17:07:19.220702
notes 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. For this study, the mountain ranges were divided into 24 mountain units due to differing climate gradients. Estimated covariate environmental and climate data used to examine the relationship between environmental conditions and Dall sheep population performance (per mountain unit) are also provided and include precipitation, temperature, snow cover, elevation, and distance to the center of the range.
num_resources 7
num_tags 22
title ABoVE: Dall Sheep Lamb Recruitment and Climate Data, Alaska and NW Canada, 2000-2015