Sustaining Biodiversity Flashcards
Biodiversity formula
Speciation – Extinction= Biodiversity
this occurs when there is enough disturbance to prevent the dominant competitors from taking over, but not so much that the community is unable to develop.
Highest diversity
Greatest threat to species diversity
Greatest threat to species diversity
“HIPPO”
Habitat destruction
Invasive species
Population (humans) growth
Pollution
Over-harvesting
right to exist, to have evolved means they have important roles
Intrinsic value
because of their use to humans (e.g. fish)
Instrumental value
knowing it exists (e.g., Forests as carbon sink)
Existence value
wildlife viewing. (e.g., Tourism activity)
Aesthetic value
value of biodiversity for the future generations
Bequest value
Types of US Public Lands
- Multiple-use lands
- Moderately-restricted use lands:
- Restricted use land
Multiple-use lands
- National Forests
- National Resource Lands
Moderately-restricted use lands
- National Wildlife Refuges
Restricted-use lands
- National Park System
- National Wilderness
- Preservation System
Consequences of Tropical Deforestation
- Rapid and increasing loss of biodiversity
- Loss of resources (e.g., medicines)
- Contributes to global warming
Causes of Tropical Deforestation
- Population growth
- Poverty
- Environmentally harmful government subsidies (encourage poor to colonize tropical forests)
- Debts owed to developed countries
- Low value of ecological services
Managing and Sustaining National Parks
- Inadequate protection
- Often too small to sustain biodiversity
- Invasions by nonnative species
- Too many human visitors
- Traffic jams and air pollution
- Better pay for park staff
