EFFECTS OF EUCALYPT DIEBACK ON BIRD SPECIES DIVERSITY IN REMNANTS OF NATIVE WOODLAND
| Posted: |
04/08/2021 |
| Author(s): |
Kenneth B. H. Er |
Data on bird species diversity, bird density, species diversity of various foraging groups and of
honeyeaters were analysed in relation to mean dieback scores of woodland remnants in the Australian
Capital Territory. Bird species diversity and bird density were found to be significantly reduced as
dieback increased. The reduction in bird species diversity can be accounted for by the declines in
subcanopy bird species diversity and insectivorous bird species diversity, the latter being restricted
most to the foliage insectivores, ground insectivores and bark insectivores. Honeyeaters were also
shown to decline significantly with an increase in dieback. Reasons for the decline in bird species
diversity with increased dieback, the dieback-insects-birds cycle and the implications of dieback for
the conservation of bird species are discussed in relation_ to these observations.
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