Flashcards
Environmental Conservation Exam 2
Cards in this deck (23)
- 1Threats to Biodiversity(Additive and synergistic)
1. Habitat destruction
2. Invasive species
3. Over exploitation
4. Global Climate Change
5. Habitat fragmentation
6. Spread of disease
7. Habitat degradation (due to overpopulation & over consumption= pop control)
*Protect habitat to over come these! - 2Human Population and Growth1850: 7.7 billion
2050: 10 billion (decline in death rate)
-Developed: logistic
-Developing: exponential - 3IPAT-Measures the impact from humans
-represents our ecological foot print
(impact x affluence x technology)
330 mill ppl x (1car/1person) x (10,120 lbs Co2/1car) = 3.34 x10^12 lbs CO2 - 4The principal human activities that threaten the habitats of threatened species1. Overexploitation (72% of endangered species face this threat)
2. Agriculture (62%).
3. Urban development (35%).
4. Invasion by invasive species and disease (26%)
5. Pollution (22%).
6. System modifications (dams) (19%). - 5Human actives that threaten the habitats of endangered species pt. 2- Most organisms face at least 2 of these issues
- 75% of endangered species assessed were harmed by overexploitation, agriculture or both. - 6*****1. Frontier ForestsIntact blocks of undisturbed forests, large enough to support all aspects of biodiversity
(not a lot left) - 7Endangered Environments #12. Tropical Rainforests
-Originally 17 million km^2
-cheap agriculture product to industrial countries are destroying them. (fast beef, wood)
Fuel wood: 2 billion ppl cook w firewood
-by 2050 no rainforests left:( - 8Endangered Environments #23. Tropical Deciduous Forests
- 9Endangered Environments #33. Temperate Grasslands
-2.5 aches-> farm - 10Endangered Environments #44. Marine Costal Areas
-filled in, modified by humans - 11Endangered Environments #55. Mangroves
-rice & shrimp cultivation - 12Endangered Environments #66. Coral Reefs
-Represent 1/3 of the ocean's fish species in 0.2% pf the ocean's surface area
-Climate change, pollution, sedimentation and over harvesting. - 13What are the 3 De-extinction methods1. Back-breeding
2. Cloning
3. Genomic reconstruction - 14Describe Back-breeding(selected breeding) create morphological and ecologically similar species [not the actual species]
- 15Describe CloningTake nucleus form an intact cell from an extinct species & insert it into the egg of a close living relative.
-(done in 2003) The clone made it to term but was deformed and died shortly after - 16Describe Genomic ReconstructionUse molecular tools, taking genes from extinct species and put into a living relative. (not done yet)
- 17Spread of Desertification-40% of land are dry areas
-anything that threatens plant life leads to the spread of deserts
-happening in the Sanel Region (overpopulation) - 18What is the real problem of desertification tied to ?* suffering
(how to fit it)
-agricultural enhancing
-combating poverty
-population control - 19How do we control human population?Improve the status and education of women in the world
- 20HabitatTotal set of conditions under which an animal conducts its activities
- 21What is the primary determinate of species abundance?Habitat
- 22Diversityrichness abundance
- 23What are the 4 key properties of a community?1. diversity
2. dominate form of vegetation
3. Trophic structures
4. Stability (ability to resist change & bounce back after disturbance
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- Environmental Studies Flashcards on Environmental Conservation Exam 2, created by Clair Schager on 30/09/2021.
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- Clair Schager
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