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Lecture 6

Geography 2320A/B Lecture Notes - Lecture 6: Emerald Ash Borer, Sea Lamprey, Asian Carp

2 pages24 viewsFall 2016

Department
Geography
Course Code
Geography 2320A/B
Professor
Gabor Sass
Lecture
6

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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
-wiping out populations and taking over
Top invasive Species in Canada: Asian Carp, Purple Loosetrife, Sea Lamprey, long horn beetle, emerald
ash borer, gypsy moth.
-not all exotic species are invasive
-active and passive dispersal
Golden Plover-can fly 4000km continuously
-elephants are amazing swimmers-cross to far islands
Seed Transportation Mothods:
Windblown
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