Skip to main content
padlock icon - secure page this page is secure

Long-Term Range Recession and the Persistence of Caribou in the Taiga

Buy Article:

$52.00 + tax (Refund Policy)

Abstract:

Spatial patterns can help in understanding the decline and future prospects of threatened species, but the dynamics of range retraction have not been applied to these fundamental questions. I analyzed long-term changes in occupancy by taiga-dwelling caribou ( Rangifer tarandus caribou ) to estimate their rate of disappearance and time to extirpation in Ontario, Canada. Patterns of range recession, 1880–1990, indicated that half of historic woodland caribou range has been lost, a rate of disappearance of 34,800 km2 per decade, and a northward range recession of 34 km per decade. The mean metapopulation density, the abundance of discrete winter groups, was one group per 1,900 km2, suggesting an average loss of 18 caribou wintering areas per decade during this period. There was a strong coincidence between the recent southern limits of caribou occupancy and the northern front of forest harvesting, implying an anthropogenic agent of decline. The estimated time to extirpation of forest-dwelling caribou in Ontario, inferred from the sustained rate of disappearance, was 91 years ( 95% confidence interval: 57–149 years ). The persistence of woodland caribou may depend on spatial separation from human incursion.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Document Type: Research Article

Affiliations: Biology Department, Trent University, 1600 West Bank Drive, Peterborough, Ontario, K9J 7B8, Canada,

Publication date: October 1, 2003

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more