Exam 6: Sustaining Biodiversity: The Ecosystem Approach

The ____________________ is a collection of 155 protected forests managed by the U.S.Forest Service.

The first step in forest management is to ____________________ for access and timber removal.

Major problems faced by national parks include all but which one?

Uncut forests or regenerated forests that have not been significantly impacted by humans or natural disasters are known as ____________________.

Currently,____ of the earth's land area is protected either strictly or partially by nature reserves,parks,wildlife refuges,wilderness and other areas.

In developed countries,many national parks are threatened by

Which of the following is not considered to be a major underlying factor in the destruction of tropical rain forests?

Future designations of Wilderness areas are currently protected under the Roadless Rule.

Deforestation affects agriculture,water supplies,and biodiversity.

Ecologists have identified ____ hot spots (or endangered centers of biodiversity)world wide that contain a large number of endemic plant and animal species found nowhere else.

Although we have explored only a small portion of the world's oceans,general patterns in marine biodiversity observed include:

What are three major economical and three major ecological benefits of forest ecosystems?

____________________ contributes to the greenhouse effect by destroying plants that use carbon dioxide.

Public lands (parks,zoos,national forests,national seashores,etc.)help sustain biodiversity.

It is important to protect watersheds in order to protect freshwater biodiversity since water and land are connected.

Vegetation in some parts of the Great Smoky Mountains National Park is threatened by ____ that were introduced to North Carolina from Europe in 1912.

The increases in American forests today are generally a result of

Forests cover about ____ of the United States.

Selective logging and strip cutting are not economically effective tools for forest management.

The ____________________ to sustaining biodiversity involves protecting habitats,biodiversity and ecological services instead of individual species.