| Autor: |
Chris J. Burwell, Elliot C. Leach, Roger L. Kitching, Richard G. Sharpe, Darryl Noel Jones |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Australian Field Ornithology. 35:119-125 |
| DOI: |
10.20938/afo35119125 |
| Popis: |
Climate change is likely to negatively impact populations of rainforest birds along Australia’s eastern seaboard. To this end, accurate estimations of species’ current population sizes are necessary for future monitoring and conservation. Here, we used distance sampling protocols to generate abundance and density estimates for 11 species of birds occupying the Gondwanan rainforests of the Tweed Caldera on the Queensland–New South Wales border. Data were collected along two elevational gradients in subtropical rainforest between September 2015 and October 2016. Half-normal functions with cosine adjustments were used to calculate the density of each species per km 2 . We used a GIS to determine the total area of suitable habitat available in protected areas adjacent to the sampling locations (~425 km 2 ) and then extrapolated the density estimates to generate estimates of population size for each target species in the study area. Estimated population sizes ranged from 473 719 (Yellow-throated Scrubwren Sericornis citreogularis ) to 21 841 (White-throated Treecreeper Cormobates leucophaea ). The standard error (SE) associated with the population estimate of the White-throated Treecreeper was large, as was the SE associated with the Eastern Yellow Robin Eopsaltria australis (estimated population 235 084), Green Catbird Ailuroedus crassirostris (69 731) and Grey Fantail Rhipidura fuliginosa (124 534). Accurate abundance estimates (SE |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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