Sustaining Terrestri

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Sustaining Terrestrial Biodiversity

Urban Sprawl

Urban Blight

decline in urban services

pop. shift to suburbs

Increase dependence on cars

increases pollution

gas comsumption

highway construction

Loss of agricultural land

urbanized area that spread into rural

Forests Management

Fire Management

nutrients liberated from biomass

natural fires allowed

prescribed burns

Ecologically sustainable forestry

animal power

maintaining all species close to the natual state

Selective-cutting

optimum growth-shade tolerent species

trees of varying age

Clear-cutting (timber-harvesting method)

increases erosion

tree plantations（single species)

Replanting( same age trees)

Land Use Concepts

Maximum Sustained Yeild

Externalities

Tragedy of the Commons

overuse

overgrazing

deforestation

overharvesting

without agreement or regulation

common resources

Federal Regulation (managing common areas)

Fish and Wildlife Sercives

Endangered Species Act

Environmental Mitigation Plan

Environmental Impact Statement(EIS)

National Environmental Pilicy Act(NEPA)

Public Lands

Protected Areas

scientific/ historical significance

wildlife/fish pop.

maintain watershed

Multiple use lands

Mining

Timber Harvesting

grazing

recreation

National Monuments

Protected landscapes /seascapes

Natural reserces /wilderness

Habitat

Managed Resources

National Parks

How humans value land

what it can provide (food, shelter, natural resources)