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Lecture 14

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University of Toronto St. George

Lecture 14 -The seasons can be organized upon a gradient on two axis, low and high precipitation and low and high temperature -In the tundra, the air mass does not lift though there is precipitation, because of this moisture is very little in these areas -Right underneath the soil of the tundra lies permafrost, in the spring this becomes a tremendous amount of standing water -The tundra has very little decomposition because of the water-logged, lack of oxygen conditions -The soil tends to have anaerobic bacteria, and the soil is low in nutrients due to these low numbers -Diversity is quite low, and the pollination synonomes are specifically generalist pollinators -The fauna of these areas tend to migrate, or else grow shaggy fur or become low in metabolism -Arctic animals in addition can produce “brown fat” which is molecularly dense -Temperate grasslands -Wind-pollinated grass is abundant in the taiga biomes, due to the fact that wind is a good way to move around pollen -These grasses possess no flowers, because of this -These areas are void of trees, and often there are surface fires every 2-5 years, and these plants have evolved fire resistant roots, or are otherwise perennial -Legumes are abundant due to their nitrogen-fixing ways -
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