FOR200H1 Lecture Notes - Lecture 3: Earth Summit, Passenger Pigeon, Great Bear Rainforest

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Week 3 - FOR200
Finishing up last week
Carbon Storage in Intact Ecosystems: A Hedge Against Climate
Change
Carbon gets trapped in trees and when a tree dies, its carbon gets
slowly released back into the atmosphere
Burning the trees releases a huge amount of carbon into the
atmosphere
o15-20% of fossil fuel emissions come from burning clear out of
forests
Case study: waiting for the ark
BC has 3,600 known plants and animals in the province
oThere’s probably about 50,000 in reality
o76% of the county’s birds
o70% of the fish
o66% of the butterflies
o60% of the conifers
o56% of ferns and understory plants
o41% of its orchids
oMost biodiversity-rich province
Grizzly bears used to roam as far south as Mexico but have been
restricted to BC and the northern territories
BC has a global responsibility for the protection of grizzly bears
Romania has a bunch of grizzly bears since their habitats were
protected for hunting (irony)
BC’s casualty list
49 species eliminated already
o4 birds
o3 butterflies
o3 freshwater fish
o3 reptiles and turtles
o3 terrestrial mammals
o22 vascular plants
Conservation status of native terrestrial and freshwater species and
subspecies in BC
Examples of secure animals
oGrizzly bears
oBlack spruce tree
oPigeons
S1 – very small populations
oE.g. spotted owl
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