Term
| The global population in 2050 will be_____which will require a 70% increase in ________ |
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Definition
| 9.1Billion, food production |
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Term
| FAO hopes the 70% increase in food production could be done by |
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Definition
| increasing productivity and bringing more land area under cultivation |
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Term
| In 2003, nations of the world committed to |
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Definition
| "a significant reduction:" in biodiversity loss by 2010 (not met) |
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Term
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Definition
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Term
| Why did population growth skyrocket in about 1940? |
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Definition
Reduction in death rate
-antibiotics
-international development
-access to medical care
-sanitation
-immuniization
-DDT-pesticides |
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Term
| old population growth equation |
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Definition
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Term
| What factors influence declines in total fertility rate? |
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Definition
-educational level-especially in women
-increase in in woman's decision making power
-Economic level decrease
-increased confidence in survival of children
-increased access to birth control |
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Term
| Elements of the Green Revolution |
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Definition
1.hight yielding crop varieties
dwarf varieties- disease resistance
2.Increase irrigation
3. Dependent on fertilizer inputs
4. HIgh pesticide use |
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Term
| The Downside of the Green Revolution |
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Definition
1. Reduction in genetic diversity of crop varieties
-corn example, lost 1/4 crops
2. Heavy inputs of fertilizer, pesticides and irrigation
3. Burden on small farmers to produce chemical inputs
4. Reports of long-term health problems from inputs |
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Term
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Definition
| the biotic community and abiotic factors that affect it |
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Term
| How does the agroecosystem differ from a natural ecosystem? |
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Definition
1.Antropogenic-human constructed
2.Loss of species diversity
3. Loss of genetic diversity
4. Artificial selection-humans will be a selective force
5. Soil highly disrupted, with inputs from farmer
6. Disturbance Habitat-erosion, wind, water
7.nutrient export
8. inputs from chemicals
9. simplified food webs
10. homogeneous structure |
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Term
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Definition
nitrogen, atmospheric element
-is a limiting factor need for DNA, proteins, ATP |
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Term
| The Global nitrogen Cycle |
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Definition
| this process is driven, in nature, by bacterial nitrogen fixation N2-->NH4+ |
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Term
| Since 1914 the amount of Nitrogen has |
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Definition
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Term
| Environmental consequences of industrial farming |
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Definition
-Fertilizer excess
-energy inputs
-water inputs
-land degradation |
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Term
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Definition
| improving agriculture would have an immediate and positive effect on protecting biodiversity |
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Term
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Definition
-reduces erosion
-reduces water use
-improved irrigation-trickle irrigation (hose w/holes) |
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