living resources
TRANSCRIPT
Living Resources
6th Grade Science
I. Environmental Issues
A. Types1. Resources
i. Renewable: Quickly replacedii. Nonrenewable: Very slow to replace
2. Population Growth3. Pollution
B. Decisions1. Balancing Needs2. Cost3. Benefits
II. Forest
A. Logging1. Clear-cutting2. Selective cutting
B. Sustainable
III. Fisheries
A. Fishing Limits1. Times of year2. Numbers of fish
B. Fishing Methods1. Net sizes2. Poisons3. Explosives
C. AquacultureD. New Resources
IV. BiodiversityA. Number
1. 1.5 million to day2. Up to 10 million new in ocean alone
B. Value1. Economic
i. Raw materialsii. Tourismiii. Jobs
2. Ecologicali. Keystone Species
C. Factors
1. Area2. Climate (7% => 50%)3. Niche Diversity (1% => 20%)
D. Gene Pool Diversity1. More different versions = better health
E. Extinction (all members gone)1. Endangered = Nearly Extinct2. Threatened = Soon will be endangered
F. Causes for Extinction1. Habitat Destruction2. Poaching3. Pollution4. Exotic Species
G. Protecting
1. Captive Breeding2. Laws and Treaties3. Habitat Preservation
V. Medicine
A. Biodiversity1. 50% of all medicine from wild
B. Taxol
1. Pacific Yew2. Cancer Treatment