The relationship between habitat breadth, habitat position, and abundance in forest and woodland birds along a continental gradient


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    Multivariate analyses of habitat ordinations (nonmetric, multidimensional scaling) were used to characterise the habitat breadth (β) and habitat position (γ) of 92 species of forest and woodland birds along a 250 km transect in SE Australia. Abundances were estimated on the basis of excluding zero-density sites (absence), leading to the notion of average density at sites at which a species occurs. There was a significant inverse correlation between β and γ. This result, when used in conjunction with the distributions of β and γ, proved incompatible with existing models of habitat occupancy patterns. The correlation between β and average density, and between γ and average density, each was approximately zero, results that differed from the findings of other studies at the range-level geographic scale. These differences are interpreted in light of the insensitivity of range-based studies, which do not explicitly account for habitat structure, to the geographic distributions of preferred habitat types of individual species of animals
    Original languageEnglish
    Pages (from-to)44-54
    Number of pages11
    Issue number1
    Publication statusPublished - 1989


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