BIOL 2903 Lecture Notes - Lecture 3: Dune, Pacific Loon, Polar Bear Provincial Park
14 Feb 2017
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Permafrost frozen soil: little decomposition, few nutrients & virtually no soil buildup. Low and flat: 0 -60 metres above sea level (asl, town called winisk was wiped out due to a flood, it"s rising by 1. 2m/100 yr & moving north by 400m/100 yr. Windy: endothermic (create heat) wind can rob more heat, therefore have to generate more heat, coldest windchill in north america, blows abrasive particles, clay & silt deposits range from 5 to 75 m thick. Tyrrell sea (7 000 8 000 yrs ago) Scaup (diving ducks) 2 kinds in ontario. Scoters (diving ducks) several kinds, e. g. surf scoter. Snow geese millions of geese now nest in tundra: # of eggs depends on conditions of females, geese have negative effects on tundra, dig up plant tubers, defecation adds nitrogen to ecosystem. Transformation of forest to farmland & prairies to corn fields. Wood frogs & chorus frogs (size of thumbnail) freeze-tolerant. Half of canada"s rivers (fw) drain into hudson bay.
