The forty-spotted pardalote is endemic to Tasmania, where it has been lost from most of its former range, and is now largely confined to a small number of offshore islands. These islands are serving as refuges for the Endangered bird; however, what caused the contraction to these places and why they still support viable populations has not been well understood.
Australia has four island groups listed as World Heritage properties, each with different geology, climate and biological values: Lord Howe Island, K’gari-Fraser Island, Macquarie Island and the Heard and McDonald Island group.
This study used DNA from the scats and feathers from burrowing petrels on remote, sub-Antarctic Macquarie Island to determine the diversity of these seabirds on the island and to assess the use of environmental DNA (eDNA) for this type of application.
Since 2011, all invasive mammals have been eradicated from Macquarie Island. Overall, the eradications have resulted in major conservation benefits for wildlife, plants, and habitats. There were some uncertainties on the outcomes for some native species, in particular native predators. We examined the impact of the invasive mammal eradication on brown skuas, the island’s terrestrial apex predator.
Macquarie Island, an Australian sub-Antarctic island, has undergone successful eradication of multiple invasive mammals, including predators that drove the extinction of the endemic Macquarie Island red-crowned parakeet in the 1880s. This study examined replacing the extinct parakeet species with a closely related surviving species.
World Heritage listed Macquarie Island is internationally recognised for its natural features including wildlife. Macquarie Island was once heavily invaded by cats, rabbits, rats and mice, and these predators led to the decline of numerous seabirds.
Sub-Antarctic Macquarie Island has been the object of Australia’s most ambitious and expensive eradication program ending in 2014, with cats, rats, mice and rabbits eradicated.