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25 Cards in this Set
- Front
- Back
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First Gene Revolution |
Artificial Selection: Cross Breeding. Achieved Desirable traits |
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Second Gene Revolution |
Genetic Engineering: GMOs... Organisms DNA altered by adding deleting or changing segments to produce desirable traits. |
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Green Revolution |
Increase crop yields through high input industrialized agriculture
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Monocultures of high yield key crops |
Rice, wheat, corn |
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Multiple cropping |
Growing consecutive crops within one year |
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Second Green Revolution |
Fast Growing dwarf varieties in tropical climates
Grown in LDC's increasing yield on less land |
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Advantages of Pesticide use |
Save human lives
Increse food supplies and profits
Work quickly
Became safer |
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Disadvantages of pesticide use |
Accelerate genetic resistance to pesticides
Expensive for farmers
Kill Natural predators
Pollute the environment
Harm Wildlife |
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Advantages of IPM |
Can reduce pest control costs by 50 %
Aids in pollution prevention |
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Disadvantages of IPM |
Requires expert knowledge on each pest situation
More time required than using pesticides
High initial costs |
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Genetic Engineering Pros |
Solve world hunger by improving yields
Need less fertilizer
More available food improves human health |
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Concerns of genetic engineering |
Uncertainty of long term potential
Reduces natural genetic biodiversity
Promotes pesticide and herbicide resistant organisms |
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Ecological Restoration |
Process of repairing damage caused by humans |
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Restoration |
Returning a degraded habitat near its original state |
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Rehabilitation |
Returning degraded ecosystems into functional systems without completely restoring it |
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Replacement |
replace a degraded ecosystem with another |
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Artificial ecosystems |
wetlands to reduce flooding or coral reefs |
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How is switching from fish or poultry beneficial to the env... |
They are more grain efficient protein forms
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Freshwater can be polluted by... |
Sedimentation clogging irrigation in ditches Which happens by soil erosion
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Point sources (Pollution in water) |
Discharge of pollutant into a body of water from a specific location |
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Non-Point Sources |
Discharge of pollutants from a broad and diffuse area |
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Patterns of Marine Biodiversity
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Greatest biodiversity is found in coral reefs, estuaries, and deep ocean floors
Biodiversity is higher in coastal zone than open sea
Biodiversity is higher at the water column than surface
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Protecting Marine BioDiversity |
National and International Regulations:
Marine Mammal Protection Act Endangered species Act
Economic Incentives:
WWF (2004) estimates that turtles are worth more to local communities alive than dead.
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Causes of forest deforestation |
Gov Subsidies
Poverty
Roads and Human Settlement
Slash and Burn Agriculture
Foreign Lumber Companies |
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Solutions to Saving Forests |
Stop clear cutting and logging in old growth forests
Put tree plantations on degraded land
Certify sustainable timber
Reforestation |
