期刊
BIRD CONSERVATION INTERNATIONAL
卷 32, 期 3, 页码 423-438出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0959270921000447
关键词
Floodplains; Kakadu National Park; Northern Australia; occupancy modelling; bird conservation; wet; dry tropics; threatened species
资金
- Charles Darwin University
- Australian Government's National Environmental Science Program through the Threatened Species Recovery Hub
- Marine Biodiversity Hub from the Australian Government's National Environmental Science Program
A survey conducted in northern Australia on the Endangered Alligator Rivers Yellow Chat found that the bird's habitat selection is influenced by fire and feral animals. The study provides recommendations for future monitoring.
Knowledge of where a threatened species occurs in a landscape is crucial for determining its habitat requirements and informing its conservation planning and management. We conducted the first broad-scale survey of the Endangered Alligator Rivers Yellow Chat Epthianura crocea tunneyi across much of its known range on drying coastal floodplains in northern Australia. Presence-absence records from 257 sites surveyed in the late dry season (August-December) of 2018 and 2019 were modelled using occupancy/detectability models. Occupancy was estimated to be 0.10 +/- 0.04 with a high detection probability (0.89 +/- 0.07). Modelling of 13 site-level environmental covariates found that chats were more likely to be detected at sites where the native shrub Sesbania sesban was present, were close to hydrogeological features such as depressions or channels, were long unburnt (5+ years) and/or with topsoil damage caused by feral pigs. Our estimates of chat occupancy, detectability, and the covariates that influence their occupancy, have improved our understanding of the role that fire and feral animals have on chat distribution and habitat selection, and can be used as a baseline for future monitoring. We also provide recommendations on how to design and implement future monitoring of this subspecies.
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