living resources

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