Exam 9: Sustaining Biodiversity: Saving Ecosystems

A tree harvesting method that involves cutting intermediate-aged or mature trees singly or in small groups is called ____.

Which type of fires usually burn only undergrowth and leaf litter on the forest floor?

Although ____________ is the most efficient and sometimes least-costly way to cut trees, it can also harm an ecosystem by causing increased erosion, sediment pollution of nearby waterways, and losses in biodiversity.

__________contain only one or two tree species, which means that they are much less biologically diverse and less sustainable than old-growth and second-growth forests.

Strips of vegetation along streams or rivers are called ____.

Describe one possible action that could help restore fish populations harmed by overfishing.

________________ occurs when too many animals graze for too long, damaging the grasses and their roots, and exceeding the carrying capacity of a rangeland area.

A forested slope is set to be logged. Which method will reduce disturbance, such as erosion and pollution, of a stream at the base of the slope from excess sediment?

One way to reduce the demand for tree cutting is to decrease the use of throwaway paper products made from trees.

What could governments do regarding deforestation to be consistent with the full-cost pricing principle of sustainability?

____ involves turning a degraded ecosystem into a functional or useful ecosystem without trying to restore it to its original condition.

A tree plantation, also called a tree farm or commercial forest, is a managed forest that contains only one or two species of trees that are all of the same age.

Explain both the positive and negative aspects of the Smokey the Bear educational campaign.

Studies indicate that at least half of the world's known species of terrestrial plants, animals, and insects live in tropical forests.

One problem that threatens aquatic biodiversity is the deliberate or accidental introduction of ____ into coastal waters, wetlands, and lakes throughout the world.

Some areas of particular conservation concern are _____, which contain a wide range of species.

An animal such as the Florida panther, which requires a very large home range, could benefit from ____________________ that connect natural areas.

Which of the following is an example of an ecosystem service provided by forests?

____ involves replacing a degraded ecosystem with another type of ecosystem.

The organization that certifies forestry operations that use sustainable practices is the ____.