Exam 10: Sustaining Terrestrial Biodiversity: The Ecosystem Approach

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Forests,both natural and planted,occupy how much of the earth's land surface,other than Greenland and Antarctica?

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Four of the following are important ecological services provided by forests;one is not.Choose the one that is not.

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Livestock graze in ____________________,which are managed grasslands or enclosed meadows,usually planted with domesticated grasses or other forage.

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Unfenced grasslands in tropical and temperate climates that supply forage for grazing animals are called ____.

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Robert Costanza of the University of Vermont estimates the monetary worth of the earth's ecological services per year at which of the following?

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The first step in harvesting trees is to build ____________________.

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Over the past 8,000 years,human activities have reduced the earth's original forest cover by about _____ %,with most of that coming in the last 60 years.

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One of the reasons for cutting trees is to provide pulp for making paper.However,paper can be made from a number of other sources.What is not a viable source of paper?

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