Humans and the Galapogas

HideShow resource information

Introducing Species

1) Red Quinie tree introduced and out competes the Scalesie Trees

2) It chanes the cosystem through aggressive growth

3) Native Cacaotilla shrubs almost eradicated from Santa CRuz

4) The Galapogas Petrel lost nesting sites and numbers fell as a consequence

1) Goats introduced and out competed the giant tortoise for food

2) Changes the habitat from forest to grassland

3) destroyed tortoise nesting sites

4) Soil Erosion

1 of 2

Over-Exploitation & Habitat Distirbance

1) Increase in fishing for exotic species and international demand for shark fins

2) whales and seal harvested to be sold internatinoally faster than they can reproduce

3) Reductions in Biodiversity

Increase in population size from 5000 to 28,000 by 2005

More Pollution and Buildings Demand for Oil Increase

Land needed for agriculture Oil Spill

Destruction and fragmentation of habitats

Scalesia trees and shrubs are eradicated on Santa Cruz and San Cristabal

2 of 2

Comments

Eisa123

HI ARE THESE JUST REVISION NOTES FOR OUR ECOLOGY SECTION OF OUR UNIT 4 BIOLOGY


Similar Biology resources:

See all Biology resources »See all Ecology, ecosystems and environmental biology resources »