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Climatic warming has direct implications for fire-dominated disturbance patterns in northern ecosystems. A transforming wildfire regime is altering plant composition and successional patterns, thus affecting the distribution and potentially the abundance of large herbivores. Caribou (Rangifer tarandus) are an important subsistence resource for communities throughout the north and a species that depends on terrestrial lichen in late-successional forests and tundra systems. Projected increases in area burned and reductions in stand ages may reduce lichen availability within caribou winter ranges. Sufficient reductions in lichen abundance could alter the capacity of these areas to support caribou populations. To assess...
Categories: Publication; Types: Citation; Tags: B5-Caribou
Research on impacts of human activity and infrastructure development on reindeer and caribou (Rangifer tarandus) is reviewed in the context of spatial (m to many km) and temporal (min to decades) scales. Before the 1980s, most disturbance studies were behavioral studies of individual animals at local scales, reporting few and short-term (min to h) impacts within 0-2 km from human activity. Around the mid 1980s, focus shifted to regional-scale landscape studies, reporting that Rangifer reduced the use of areas within 5 km from infrastructure and human activity by 50-95% for weeks, months or even years and increased use of remaining undisturbed habitat far beyond those distances. The extent could vary with type of...
map background search result map search result map Range ecology of the Porcupine caribou herd in Canada Chisana Caribou Range Lichen Assessment, September, 2011 Chisana Caribou Range Lichen Assessment, September, 2011 Range ecology of the Porcupine caribou herd in Canada