Presentation on theme: "Bellringer Why does wilderness need to be preserved?"— Presentation transcript:
1 Bellringer Why does wilderness need to be preserved? Why shouldn’t we consider the needs of humans first?Why don’t we consider only our short-term needs and worry about the consequences later?
2 Land Management and Conservation Section 14.3 Objectives:Describe ways to preserve farmland, rangeland, and forest land.Explain the functions of parks and wilderness areas.Land Management and Conservation Section 14.3
3 Main Categories of Rural Land FarmlandRangelandForest landNational and State ParksWilderness
4 Farmland Used to grow crops and fruit Provides an important oxygen sourceModerates temperaturesNational Farmland Protection Program helps protect farmland in danger of being paved over or developed.
5 RangelandLand that supports different vegetation types and that is not used for farming or timber production (anything from deserts to swamp land)Most common use is for grazing of livestock, so essential for world’s food supply
6 Rangeland (cont.) Problems Overgrazing – allowing more animals to graze than the land can supportOnce plants are gone (due to overgrazing), soil can erode.
7 Rangelands (cont.) Maintaining the Range Public Rangelands Improvement Act of 1978: aims to improve land management practice.Leave land unused to let vegetation recover.Limit herd sizes to prevent overgrazing.Killing invasive plants and replanting native plantsDig several small watering holes to spread herds out over larger areas.
8 Forest Lands Harvesting trees Clear-cutting: removing ALL trees from an area of landDestroys wildlife habitatsCauses soil erosionSelective cutting: cutting and removing only middle-aged or mature treesMore expensiveLess destructive – minimizes impact on the forest
9 Forest Land (cont.)Deforestation: clearing trees from the land and not replacing themReduces wildlife habitatsSoil erosionLocal climate changeUsually happens as populations expand and need more land for homes, businesses, and roadsReforestation: replanting to re-establish trees that have been cut down in a forest land
10 Parks and Preserves 1870 – Yosemite became the first national park Wilderness: an area in which the land and its ecosystems are protected from ALL exploitationThese protected areas are still threatened by growing populations:trash from visitorswater and air pollution from surrounding areasclimate changes