Week 1 Lecture 1 - Before Humans

Australia extentofaustralasiaandbarriers

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Unformatted text preview: es •  Wide range (from hot & wet to dry & hot to cold alpine) •  Results in wide variety of habitats •  Reflected in high biodiversity Major Vegeta3on Types •  VegetaKon pa]ern largely mirrors climaKc zones; with most forests in well‐ watered coastal belts •  Extensive woodland zone also includes grasslands and cropping areas Biodiversity Australia •  one of ~18 Megadiverse Regions world‐wide •  Vertebrates ~ 8,000 species (5,000+ fishes) •  Invertebrates ~ 114,500 species (~ 250,000) •  Plants 20,000+ species (23,000) •  Micro‐organisms ~ 30,000 species (300,000+) Total described ~ 172,000 ( es3mated 580,000 – 680,000 ) New Guinea •  sKll poorly known, but known to be very diverse ( ~5% of es3mated world biodiversity) Total recognised ~ 400,000 ( es3mated 700,000 ) New Zealand •  very reduced diversity (due to volcanism and isolaKon) Total described ~ 30,000 ( es3mated 70,000 ) Summary of Key Points •  Long‐term environmental events influencing d...
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This document was uploaded on 04/05/2014.

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