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A comparison of species counts and density estimates derived from area searches, line transects and point counts in the jarrah forest of south-western Australia

Craig, M.D. (2004) A comparison of species counts and density estimates derived from area searches, line transects and point counts in the jarrah forest of south-western Australia. Corella, 28 (2). pp. 55-59.

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Abstract

No studies have examined differences between census methods for birds in south-western Australian forests, yet unique features of south-western forests may be responsible for differences from those recorded in studies conducted elsewhere. Differences in the number of bird species recorded and densities estimated by area searches, line transects and point counts in jarrah forests of south-western Australian were examined. All three methods detected a similar number of species but area searches higher estimates of overall bird density. This difference probably occurred because are searches were conducted for a longer period of time and detected more cryptic birds in a given area that the other two methods. These results were similar to studies conducted in eucalypt forests on south-eastern Australia and in non-forest habitats in western Australia, suggesting that differences between the three methods were consistent across different habitats and regions in Australia. However, density estimates should not be compared directly between studies using area searches and either line transects or point counts, even if the censuses are conducted for the same length of time.

Publication Type: Journal Article
Publisher: Australian Bird Study Association Inc
URI: http://researchrepository.murdoch.edu.au/id/eprint/28162
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