The longest environmental barrier in the world is Australia's 5614 km Dingo Barrier Fence. The structure was completed in the 1950s, designed to facilitate the eradication of the country's apex predator and cultural keystone species the dingo from sheep grazing areas to the south-east of the continent.
This report examines 82 million hectares of marginal grazing lands in south-east Australia, linking human–wildlife conflicts in the region with the severe land degradation and biodiversity loss in the region. Drought is the predominant state for the region, yet prior to colonisation the land supported many people and highly specialised plant and animal communities adapted to thrive in the extreme climate. These have been largely displaced by agricultural operations since the 1850s .
Australia’s marginal sheep grazing lands is a sparsely populated region, subject to irregular rainfall and episodic weather, high temperatures and large flood plains (Fig.