Climate change impacts on Australian Rangelands
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چکیده
The recent IPCC Fourth Assessment report concluded that Australia has significant vulnerability to the changes in temperature and rainfall projected under climate change (Hennessy et al. 2007). Agriculture and natural resources were two of the key sectors identified as likely to be affected strongly. Extensive grazing is by far the most widespread agricultural land use in Australia. Most of the country is unsuitable for intensive agricultural production and is used instead for low intensity production of beef and sheep (meat and wool). The grazing industry has been an important contributor to the overall economic growth of Australia, but has also been vulnerable to the impacts of a variable climate (Campbell 1958; Anderson 1991). Climate change will likely add to and exacerbate existing pastoral management challenges such as declines in pasture productivity, reduced forage quality, livestock heat stress, greater problems with some pests and weeds, more frequent droughts, more intense rainfall events, and greater risks of soil erosion (Hennessy et al. 2007).
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