Envi Sci 14.3 Quiz
increased population & demand
2 reasons most countries become severely deforested
killing invasive plants, planting native vegetation, & fencing areas to let them recover
3 ways to improve rangeland that has been degraded by overgrazing
extent of flooding, landslides, & erosion
From deforestation, what 3 things help the forest become allowed to regenerate or replanted
degraded
Much of the rangeland in the U.S. is public land managed by the federal government, which leases the rangeland to ranchers. However, much of the rangeland in the U.S. is
3.5
On average, each person in the United states uses about ___________ times the amount of wood used per person worldwide
the ecological service it provides
The condition of rural land is important because of
Rangeland
The land that supports different vegetation types like grasslands, shrublands, and deserts. This land is not used for farming or timber production
grazing of livestock (Cattle, sheep, goats, & native wildlife)
The most common human use of rangeland is for the
rain forests
The problem of deforestation is especially serious in
clear & selective cutting
The two most widely used methods of harvesting trees are
Public Rangelands Improvement Act (1978)
This ACT was enacted to improve land management practices by limiting herds to sizes that do not degrade the land in order TO REDUCE OVERGRAZING
Farmland
This land is used to grow crops and fruit. The U.S. contains more than 100 million hectares of this type of land
urban expansion is not a serious environmental problem
What about farmland is false?
farm, range, forest, parks, & wilderness
What are the 5 main categories of rural land?
replacing cows & sheep with exotic animals
What is not a common method for improving rangeland?
setting aside continuous tracts of land is expensive
What is not a reason to use wilderness corridors to help preserve wildlife habitat?
it was the first national park
What is one of Yellowstone's distinctions?
1,800
What is the WORLDWIDE average in cubic centimeters (cm3) of wood used per person each day
removal of CO2 from the air
What is the most important ecosystem service provided by forests?
any land protected from development & human impact
What phrase best defines wilderness according to the U.S. wilderness act of 1964?
urban development
What threatens some of the most productive farmland
D
Which of the following does not threaten protected public lands? A. overgrazing B. mining & logging C. trash & overuse D. none of the above
40
World population growth may require a __________ percent increase in the food production of rangeland from 1977 to 2030.
90
Worldwide, more than ____________ percent of all timber comes from unmanaged forests
Wilderness
a region that is not cultivated and that is not inhabited by humans
Tree farms
areas where trees are planted in rows and harvested like other crops.
1.5, firewood
About __________ billion people in developing countries depend on ________________ as their main source of fuel
less expensive
An advantage of clear-cutting
National Farmland Protection Program (NFPP)
In 1996, the U.S. government established this PROGRAM to help state, county, and local governments PROTECT FARMLAND in danger of being paved over or otherwise developed. The program was renewed in 2008.
severe overgrazing
In this type of overgrazing, all the vegetation that covers the land is eaten. Once the plants are gone, there is nothing to keep the soil from eroding
less desirable plants replacing more desirable ones
Overgrazing often results in changes in the plant community, such as:
mature trees
Selective cutting involves cutting
virgin, native, tree farms
The 3 categories of FOREST lands:
Native
forests that are planted and managed
Virgin
forests that have never been cut
Overgrazing
the depletion of vegetation due to the continuous feeding of too many animals
Deforestation
the process of clearing forests
Selective cutting
the process of cutting and removing only MIDDLE-AGED or MATURE trees. It is more expensive than clear-cutting, but is usually much less destructive. It is usually practiced on smaller areas owned by individuals
Clear-cutting
the process of removing all of the trees from an area of land. Using this type of cutting for large areas destroys wildlife habitat and causes soil erosion
Reforestation
the reestablishment and development of TREES in a FOREST land