chapter 12 questions for review
1.) Forests 2.)Tropical rainforests in Africa, South America, and Southeast Asia are dying the most. The ones that are growing the most are the forests in North America.
3.) Ruined ecosystems, increased pests, lower level life forms take over, loss of indiginous peoples and rare organisms, increase in levels of O2 gas.
4.)Clear cutting is a process in which all trees are cut down regardless of whether they are mature enough to do so, the ones that are not ready are thrown away. Below cost timber sales encourages the mass consumption of wood because its being sold at prices way below it should be. These are bad because excess trees are cut down because of both of them.
5.)Salvage logging is a removal of dead or dying trees from forests damaged by fire or disease. Forest thinning is a process to take out trees that may be best taken to encourage the growth of other trees. Its all good because it takes what the environment is using less actively, its bad because it takes away from a process of nature, decomposition.
6.)The advantages of monoculture foresting are high profit and yeild, saving money because clear cutting is prefered, the problem is that they encourage pests and disease infestation.
7.) Swidden agriculture is a slash and burn technique. An area is designated, trees are dried out, then burned, after the process is over there is a rich seedbed of ashes. This is better for some areas because it is a very natural process, the environment is ready to hangle this technique.
8.) Overgrazing leads to animals eating down to the roots of plants, the plants dont exist after and the soil goes bad, once there is nothing to hold the soil, the livestock turns up the soil. These are ideal conditions for forage species.
9.) Semi fertile soils can be used and cows will take it and use it where it would not be profitable to grow or live reasonable organisms.
10.)Examples of recognition of indigenous land titles are as follows; the Yanomamami in Brazil; aborigese in Austrailia have taken back the Circular Quay; and Nunavut in Canada has been returned to the Inuktitut tribe.
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February 5th, 2006 at 11:32 pm
All of your Hw has been recorded…keep up the good work!