Exam 6: Sustaining Biodiversity: The Ecosystem Approach

According to the 2005 Millennium Ecosystem Assessment,the volume of water held behind dams is three to six times the volume of natural river flow.

Since 1986,the World Conservation Union has helped establish a global system of ____________________,which provide oceans with partial protection from human activities.

According to the National Park Service,air pollution affects scenic views in national parks more than ____ of the time.

Reversing environmental damage is called ____________________.

How have marine reserves helped marine ecosystems?

Ecologists classify forest plantations as cropland rather than forestland.

Forest degradation leads to all of the following except

Reconciliation ecology is the science of

The National Wilderness Preservation System includes wild and scenic rivers.

Tropical rainforests are being rapidly fragmented by all except

Second-growth forests can be described by all of the following except they

Tropical forests are found in all but which of the following continents?

Tropical deforestation is a major concern throughout the world yet significantly decreases poverty in some countries.

List and define four types of ecological restoration.Why is restoration important?

Wilderness areas are needed for

Undeveloped land can be protected from human degradation by designating them as wilderness areas. Make one argument in favor of and one argument against setting aside large wilderness areas.

Natural ecosystem recovery can be achieved through

Compared to 1900,American forests today are generally

The U.S.national park system includes ____ major national parks.

Decreased soil fertility,premature extinction of species,and acceleration of flooding are all ramifications of ____________________.