Chapter 6 Flashcards
(15 cards)
Although most of the world sports are shrinking biologists are especially concerned about tropical forests lost because
They contain such high biodiversity
Tropical forests typically have only a few commercially valuable trees per acre logging operations?
Do extensive damage because of roadbuilding an injury to surrounding trees
Of all the old growth forest that student United States before European settlement how much remain today?
Less than 10%
Most commercial waters prefer clear-cut harvesting because it?
Is most efficient cheapest tires method using large fast machinery instead of constantly labor
The primary aim of the US forest service has historically been to provide for?
Multiple uses
Anyway the four service blank on timber sales mainly because of the emphasis on blank
Loses money, building roads into forested areas
Economically monoculture for three is advantages for the loggers because
It produces large quantities of a single type of tree for particular use, such as building timber or paper pulp
The first symptom of range overgrazing is usually?
The disappearance of plantable vegetation
World deserts are?
Increasing because of logging in grazing
Most public rangeland are in poor condition due to?
Overgrazing a private livestock
National parks are an important part of our heritage
But they are endangered by overcrowding, population, and in some places mining
Five large numbers of people continue to visit national parks the park services budget?
Is chronically underfunded
Loggers and the timber industry object to setting aside Land to protect the spotted Owl because they
Depend on natural resources in the area for their livelihood
As presented in class promising approach to encourage conservation and preservation in developing countries is?
Debt for nature swaps
The country that claims to have the highest proportion of its land area protected is
Venezuela
