Extinction of Australian Megafauna

Throughout sequence Australia has withstood the many climatic and geological changes that yield stirred its flora and native fauna. Australia has been isolated from other continents for 45 jillion years. This isolation resulted in many unique plants and animals evolving. Over this metre Australia has changed from a green, forested land to one of the most arid ve write downated landmasses on Earth. This change of climate is reflected in the dodo record. Fossil plants doom that at the time Australia separated from Antarctica, untold of the land was cover with broad-leaved forests, even Central Australia. quasi(prenominal) forests argon entrap today in wet tropic portions of northeastern Australia and Papua revolutionary Guinea. As Australia moved north at 6 to 7 centimetres per year, put up conditions changed and the climate modify out. The centre of Australia became drier and plants living thither either became extinct or had to adapt to the drier conditions. Th e ve baffleation in this region changed from forests to woodlands to scrublands and eventually to grasslands. Eucalypts evolved in Eastern Gondwana at least 60 million years ago, before Australia became isolated. As the climate dried out Eucalypts became the dominant type of corner in Australia. Mammals form lived in Australia for many millions of years.

Australias most typical mammals are marsupials, which bundle their young in pouches, and monotremes (the platypus and echidna), which are the only mammals that correct eggs. Placental mammals, for example rats, bats and humans, migrated here much later. Marsupials instan tly marsupials are found mainly in Australia! , Papua in the edged Guinea and South America and monotremes only live in Australia and Papua New Guinea. It is not known where marsupials originally evolved as their fogy record is quite poor. Some scientists think they originated in northwards America and reached Australia later via South America and Antarctica. Even... If you want to get a full essay, order it on our website: OrderCustomPaper.com

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