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Lectures notes from 2/9/16

by: chloegrignon

Lectures notes from 2/9/16 ISB 201

Marketplace > Michigan State University > Entomology > ISB 201 > Lectures notes from 2 9 16
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The last lecture notes before our first exam
Insects, Globalization, and Sustainability
Dr. Gabe Ording
Study Guide
ISB 201
50 ?




Popular in Insects, Globalization, and Sustainability

Popular in Entomology

This 3 page Study Guide was uploaded by chloegrignon on Wednesday February 10, 2016. The Study Guide belongs to ISB 201 at Michigan State University taught by Dr. Gabe Ording in Fall 2015. Since its upload, it has received 45 views. For similar materials see Insects, Globalization, and Sustainability in Entomology at Michigan State University.


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Date Created: 02/10/16
Last lecture before exam 1 Desertification  Healthy ecosystem becomes arid  1/3 of population lives here  Causes: overgrazing, deforestation, soil compaction Explain how desertification occurs: Overgrazing leads to decline of plants leads to exposed soils leads to erosion leads to  topsoil and nutrients gone which leads to desertification Soils of Michigan  Major factors impacting soil management:  Glaciers: 30 inches of topsoil in 10,000 years  Soil erosion  Sustainable yield: soil is a renewable resource but we are using it more than it can be replenished   Soil regeneration is really slow; being lost 10­40x more than it can be replaced Dust bowl What economic highs and lows contributed to it?  Wheat grew without crop rotation practice  Farmers plowed intact ecosystems to grow more wheat  Too much wheat was produced so price declined and farmers left as a result,  which meant fields were left exposed, causing the dust storm and soil pickup Hubbert’s Peak  Calculation on a bell curve that estimates that when this is hit, half of our  nonrenewable oil stock will be depleted.   Related, phosphorus is also reaching its peak of depletion, which is more  important than oil because we use it for farming and there are no comparable  alternatives to it Ording, Gabe. "Environmental ecology." Lecture.


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