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Lecture 6

Geography 2320A/B Lecture 6: LEcture 6

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Department
Geography
Course Code
Geography 2320A/B
Professor
Gabor Sass

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find more resources at oneclass.com 13 Oct, 2016 Lecture 6: Fundamental Biogeographic Processes -dispersal -evolution -extinction -rabbits introduces to port in Australia, quickly spread across the country within 100 years -pushed out other species Dispersal: movement if species away from their homerange -these e▯ents allo▯ expansion of the spe▯ies’ distri▯utions to▯ard its fundamental geographic range (livable environment) Biogeographic Range: larger range ecological dispersal-move outwards from main population Dispersion: spatial distribution as a whole -successful dispersal involves: travel to a new area, withstanding the new conditions, establish a new population -two main types of dispersal: Jumps and Diffusion Krakatau, Indonesia-volcanic explosion -destroyed half the island -recolonization-rapid-2 decades- 100 species -Euopean starling brought to NA by humans -Cane Toad: Australia-introduced to control insect on the sugar cane crop -ended up being very poisonous to other animals -even eggs and tadpoles are poisonous to fish
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