Unit 5 APES Land and Water Use Review- AP Environmental Science

Review of AP Environmental Science Unit 5: Land and Water Use
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Timestamps
0:08 - Tragedy of the Commons
» Common resources are exploited at unsustainable rates.
1:22 - Water Resources
» Aquifer overdraft
3:35 - Irrigation
» Furrow
» Flood
» Spray
» Drip
» Impact: Salinization
5:05 - Industrial Agricultural Impacts
» Tillage - loosening land for crops but leads to erosion.
» Top Soil - holds water and nutrients
» Erosion - mitigation methods: cover crops, low till methods.
» Desertification - loss of soil productivity
» Salinization - result of irrigation evaporation leaving salt/minerals behind.
» Integrated Pest Management - control pests through crop rotation, natural predators, GMOs.
7:33 - Mining
» Reserves - source we can mine from
» Overburden - soil removed when mining
» Spoils - waste created by mining
» Tailings - residue from mining
8:36 - Mining Impacts
10:10 - Fishing Impacts
12:17 - Aquaculture (Aquafarming)
» Benefits: Efficient, uses less land
» Impacts: Antibiotic resistance, concentrated waste, escaped fish.
13:37 - Benefits of Forests
» Prevents erosion, stores carbon, slows runoff, etc.
14:25 - Deforestation Issues
» Allows erosion, more carbon in atmosphere, more runoff, etc.
14:55 - Forest Fires and Cutting
» Control Burn - intentional burning of forests
» Clear Cutting - efficient but leads to deforestation
» Selective Cutting - cuts only certain trees to maintain habitat
16:25 - Rangeland (Tragedy of the Commons issue)
» Overgrazing of cattle
17:28 - Urbanization
18:57 - Concentrated Animal Feeding Operation (CAFO)
» Benefits: Efficient, uses less land
» Impacts: Antibiotic resistance, concentrated waste, eutrophication

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