Agricultural change and paddock tree loss: implications for an endangered subspecies of red-tailed black-cockatoo

Maron, Martine (2005) Agricultural change and paddock tree loss: implications for an endangered subspecies of red-tailed black-cockatoo. Ecological Management and Restoration, 6 (3). pp. 206-211. ISSN 1442-8903

Abstract

Natural senescence and the intensification of agricultural practices are contributing to the continuing loss of paddock trees from agricultural regions in Australia. This is of particular concern in the southern Wimmera of western Victoria, where much of the endangered Buloke (Allocasuarina luehmannii) Woodland vegetation community is represented only by relict Buloke trees in paddocks, which also constitute critical feeding habitat for the endangered south-eastern subspecies of the Red-tailed Black-Cockatoo (Calyptorhynchus banksii graptogyne). I investigated the rate and correlates of loss of scattered Buloke trees in paddocks by examining aerial photographs taken over a period of 15 years in a region undergoing agricultural intensification. Tree loss over the period was measured using aerial photographs of five localities, covering a total of 7850 ha of agricultural land in the southern Wimmera. The average rate of loss (± 1 SE) was 25.8% ± 6.4% over the 15 years, or 1.7% per annum. The rate of tree loss was higher in areas under cultivation (32.5%) than areas under pasture (20.6%). A disproportionate number of trees was lost from locations where centre pivot irrigation systems were installed. Because of the slow growth rate of Buloke trees, revegetation efforts and offset planting are unlikely to compensate for losses of Red-tailed Black-Cockatoo habitat for approximately 100 years.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Deposited in accordance with the copyright policy of the publisher. The definitive version is available at www.blackwell-synergy.com.
Depositing User: Ms Sandy Sharman
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 00:55
Last Modified: 02 Jul 2013 22:41
Uncontrolled Keywords: agricultural intensification; buloke; endangered species; landscape change; paddock trees; red-tailed black-cockatoo; tree loss
Fields of Research (FOR2008): 06 Biological Sciences > 0602 Ecology > 060208 Terrestrial Ecology
05 Environmental Sciences > 0501 Ecological Applications > 050104 Landscape Ecology
05 Environmental Sciences > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9608 Flora, Fauna and Biodiversity > 960804 Farmland, Arable Cropland and Permanent Cropland Flora, Fauna and Biodiversity
Identification Number or DOI: doi: 10.1111/j.1442-8903.2005.00238.x
URI: http://eprints.usq.edu.au/id/eprint/1984

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