Geography Environment

GEOGRAPHY NOTES ·         Since European settlement between 78 & international ampere; speed of light plant species check become are dead. 150-200 under threat. ·          genic DIVERSITY - safeguard species diversity. Large mold of genetic forms inwardly each species. Genetic variations. ·          Extinct- leaveance of species after essential intrusive (some extinction is natural) ·          At risk- in danger of beseeming extinct ·          Endangered- close to extinction in the wild unless something is do the species could disappear altogether ·          Vulnerable- The step before jeopardize ·          Rare- hardly a(prenominal) of a particular species remain , less serious category than endangered ·         Extinction can occur naturally because of climatical remove which af fects the phytology on which faunas depend. ·         MEGAFAUNA-large Australian mammals from the ice epoch ·         Aborigines 50000 yrs agone modified asia Australia bridge vegetation through enthusiastic it verboten resulting in dry arid landscapes. This also could relieve oneself do extinct the megafauna. ·         In Aus since 1788 only 30% of the vegetation ashes unmodified to osme degree. ·         Cultural Vegetation means exotic or introduced species, such as those found in ornamental gardens or pine plantations. ·         The murray darling was dammed affecting surrounding habitats ·         Introduced species oblige had a 3 fold effect on environments 1. Grazing         2. antagonist between native and introduced species 3. introduced species can introduce formerly inexplicable diseases.

·         In recent years large amounts of insecticide and weedicide have been used and effect the food chain ·         Homozygosity- breeding of the very(prenominal) species of animals ·         Hybridise- obscure breeding of plants ·         Wildlife is harmed by recreation practises ·         Oldest nat. park in Australia is Witches go in QLD founded 1908. ·         Rachel Carsons SILENT SPRING showed the impact that pesticides could have in areas far outside where they were applied. ·         We are using up our renewable resources faster than we can replace them ·         Unique plant and animal species · ... If you want to get a full essay, vow it on our website: OrderEssay.net

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