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Jeremy Kerr

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28092011Lecture 5Mixed Wood PlainBoreal SheildUnderlying substrate not soluble granitic substrate dissolves and weathers slowly Cant provide nutrients because granite is insolubleNot fertileDrainage leads to wetland formation Bogs acidic substrates underneath themSeasonal variation very high and lowOrganisms have to be able to tolerate this change birds migrate there as the leaves turn greener seasonal diverse gradients track seasonal nutrient gradient bird diversity tracks variationDrier than mixed wood plains can cope with low precipitation levelsDynamic change quickly colonise soon after disturbance Wolf population black and grizzly bears cougars mountain lionsSequesters carbon the most soil carbon in the world and into biomass Fixed into vegetation C
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