Densities of breeding birds at Polar Bear Pass, Bathurst Island, Northwest Territories
1983; Ottawa Field-Naturalists' Club; Volume: 97; Issue: 4 Linguagem: Inglês
10.5962/p.355038
ISSN0008-3550
Autores Tópico(s)Botany, Ecology, and Taxonomy Studies
ResumoPolar Bear Pass is an "oasis" in the polar desert of the Canadian high arctic.One km? of sedge-moss meadow censused in four consecutive years held a mean nesting density of 12 pairs/km?, and an adjacent dry upland tract held a density of 4 pairs/km?.Eight species nested on the wet meadow, two other species resided there but did not nest, and 11 species nesting in the vicinity visited regularly to feed.Seven species nested on the upland tract, feeding mostly away from it on the better-vegetated lowlands.These nesting densities were higher than those reported fora few locations farther north, but only 1/ 10 the densities found at some arctic sites farther south.
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