Gibson Desert birds: responses to drought and plenty
A. A. Burbidge A C and P. J. Fuller A BA Western Australian Wildlife Research Centre, Department of Environment and Conservation, PO Box 51, Wanneroo, WA 6946, Australia.
B Present address: 3 Willow Rd, Warwick, WA 6024, Australia.
C Corresponding author. Email: Andrew.Burbidge@dec.wa.gov.au
Emu 107(2) 126-134 https://doi.org/10.1071/MU06044
Submitted: 19 September 2006 Accepted: 18 April 2007 Published: 15 June 2007
Abstract
There is little information on the response of birds to rainfall in the Australian arid zone. Counts of birds between 1988 and 1992 on paired 1-km2 quadrats representing major landform and vegetation types in the Gibson Desert revealed significant changes in species richness, community composition and abundance during increasing drought and following drought-breaking high rainfall. Species considered sedentary or resident (sedentary–resident), which were insectivorous or carnivorous, declined in abundance as the drought progressed, with at least one species, Rufous-crowned Emu-wren (Stipiturus ruficeps), apparently disappearing from the quadrats and not reappearing following heavy rainfall. Irruptive species, which were granivorous, nectarivorous or insectivorous, included species first recorded after heavy rainfall. Some species often considered to be nomadic, such as White-fronted (Phylidonyris albifrons) and Pied (Certhionyx variegatus) Honeyeaters, appeared to be both sedentary–resident and irruptive. Most species were recorded in more than one quadrat-pair; a few were recorded only in Mulga (Acacia aneura) tall shrubland – Common Bronzewing (Phaps chalcoptera), Boobook Owl (Ninox novaeseelandiae), Spotted Nightjar (Eurostopodus argus), Ground Cuckoo-Shrike (Coracina maxima) and Inland Thornbill (Acanthiza apicalis). Breeding activity showed a strong correlation with rainfall, with more breeding occurring in spring than the previous autumn.
Acknowledgements
This study was funded by the Western Australian Department of Conservation and Land Management (now incorporated into the Department of Environment and Conservation). We thank Mike Choo for writing the programs that were used to store bird data, Tony Start for helping survey birds during one visit, Graeme Behn for preparing the greenness index (NDVI) for our study site, Norm McKenzie for conducting the PATN analysis, Matt Williams for advice on statistical analyses and assistance with the CAP analysis, Brian Kowald of the Bureau of Meteorology for providing rainfall data, and Allan Burbidge for providing helpful comments on a draft of this paper.
Allen, C. R. , and Saunders, D. A. (2002). Variability between scales: predictors of nomadism in birds of an Australian Mediterranean-climate ecosystem. Ecosystems (New York) 5, 348–359.
Chan, K. (1999). Bird numbers in drought and non-drought years in tropical central Queensland. Tropical Ecology 40, 63–68.
Keast, A. (1968). Seasonal movements in the Australian honeyeaters (Meliphagidae) and their ecological significance. Emu 67, 159–209.
Morris, W. J. , and Wooller, R. D. (2001). The structure and dynamics of an assemblage of small birds in a semi-arid eucalypt woodland in south-western Australia. Emu 101, 7–12.
| Crossref | GoogleScholarGoogle Scholar |
Tucker, C. J. , and Sellers, P. J. (1986). Satellite remote sensing of primary production. International Journal of Remote Sensing 7, 1395–1416.
Wallace, J. , Behn, G. A. , and Furby, S. (2006). Vegetation condition & monitoring from sequences of satellite imagery. Ecological Management & Restoration 7, S31–S36.
| Crossref | GoogleScholarGoogle Scholar |
Wiens, J. A. (1991). Ecological similarity of shrub-desert avifaunas of Australia and North America. Ecology 72, 479–495.
| Crossref | GoogleScholarGoogle Scholar |