Ecosystem succession vs. artificial succession (crops)4/16Why is it there?- Understanding the natural ecosystem that existed prior to agriculture helps us understand the history and fertility of its soils and climate.- 10,000 years ago, at the Corn Belt, there were glaciers- Soil has had 10,000 years to develop- Glaciers act as a bulldozer (grow in winter, retreat in summer, grow in winter…) Because ofCanadian soil moved southMajor source of petroleum : algaeMajor source of coal: PlantsPractice Questions:
native system was one of the biggest carbon “sinls” on the planet (since the last ice age) 1)What does it mean to be a carbon sink? 2)What does it mean to be a carbon source? 3)How did the prairie brass regions of the US change with the introduction of agriculture? 4)Why? 1)Grass and Herbivores- Herbivores depend on grass - Why does grass depend of herbivores? 1) Grass is only one type of angiosperm - name some others that vary in structure (look out- side the window) 2)What happens when grazers graze on these other plants? 3)What happens when grazers graze on grass?
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- Fall '15
- Ecology, Sucrose, Fructose, Corn Belt, fewer farmers