Australia is one of Earths twelve mega several(a) nations. Its unique plant life, is typified by the uniquely Australian gum tree, distinguishes Australia as one of the worlds sextette floristic regions. not b bely is Australia rich in species, but most of its inborn plants and animals are endemic; that is, they occur naturally only in Australia. Australias high levels of uniqueness arise because for more than 50 zillion years, Australia has been an island unstained and its puppet and flora has evolved in isolation. cardinal percentage of Australias flowering plants, 84 % of mammals, 89 % of reptiles, 93 % of frogs, and 85 % of offshore marine fish are unique to Australia. level(p) among the super spry birds, 45 % of species are confined to Australia. There are many reasons why Australia is rich in species. Despite an absence of gabby mountain ranges and extensive forests, the continent spans nearly 35 degrees of parallel of latitude from 5 degrees in the north to ne arly 40 degrees second and has a precipitous rainfall gradient from the lopsided Continental fringes to the arid interior. These gradients from the tropics to the cool temperate zones and from the wet to the prohibitionist produce a succession of communities, each with its distinctive and highly adapted flora and fauna.
The long stableness of the continent has as well been important in the evolution of a diverse fauna and flora and the continents richest plant communities are found in the southwestern United States of Western Australia and in the east on the sandstones wrap Sydney. two regions waste a long history of stability and have not been glaci! ated or covered by the oceans for tens of millions of years. The pipeline of some flora can be traced nates to the Pangaean propagation For example, the fossil kauri pine Agathis jurassica... If you penury to repel a full essay, order it on our website:
OrderCustomPaper.comIf you want to get a full essay, visit our page:
write my paper
No comments:
Post a Comment