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No abstract

The population of the Western Arctic Herd, estimated at 490 000 caribou (Rangifer tarandus granti) in 2003, is at its highest level in 30 years. Twenty permanent range transects were established in the winter range of the Western Arctic Herd in 1981 to assess the impacts of grazing. These transects were revisited in 1995 and 1996 (1995/96 Shrub cover increased during the study whereas forb cover declined. The decline in lichen abundance on the winter range of the Western Arctic Herd over 24 years is an index of caribou habitat condition. The observed changes in vegetation cover can be attributed to caribou grazing, fire, and possibly global climate change. Continued declines in lichen cover could lead to population declines within the herd, range shifts, or both.

Post-fire Succession at Ulukluk Creek Lichen Recovery on Older Burn Sites Discussion and Management Implications Lichen Recovery Recovery of Vascular Plants '. Comparison of Point-frame and Canopy Cover Class Methods Conclusion Literature Cited 11 Appendix A: Tundra fire recovery at Ulukluk Creek study sites Appendix B: Transect one (Tl) and Transect two (T2) at post-burn intervals Appendix C: Three-year photoplot comparison Appendix D: Successional changes on individual quadrats at post-burn intervals. Ulukluk Creek study site Appendix E: Comparison of individual unburned control quadrats at the Ulukluk Creek study site Appendix F: Tundra fire recovery in western Alaska 21