Bird communities of northern forests: patterns of diversity and abundance

Article Abstract:

Bird communities of northern forests of southeast Alaska exhibit some tendency toward greater diversity and abundance in deciduous than in coniferous forests. However, variation within each general forest type, as well as changes from year to year, make it difficult to determine any general trend. Rarefaction curves are similar for coniferous and deciduous forests. Site diversity, point diversity, spatial heterogeneity and relative abundance are assessed by location, vegetation type and year. Results suggest the need to preserve different plant communities to promote regional biodiversity.

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Bird communities of northern forests: ecological correlates of diversity and abundance in the understory

Article Abstract:

Local ecological factors influence the diversity and abundance of birds in the northern forests of North America. Factors such as density of understory vegetation and litter invertebrates, abundance of foliage invertebrates and nest safety appear to affect abundance and diversity. Birds inhabiting the understory areas often move nests to moss wads in the canopy and subcanopy. Geographical barriers such as coastal mountain ranges and metapopulation dynamics have no influence on species diversity and abundance.

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Nesting success of forest birds in southeast Alaska and adjacent Canada

Article Abstract:

Research concerning the predation of thrush-sized and warbler-sized nests situated in different degrees of cover or nest density is presented. The coastal forests of Alaska and Canada were found to suffer from 78% nest predation rates.

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