Presentation on theme: "CHAPTER 14, SECTION 3: LAND MANAGEMENT & CONSERVATION STANDARDS: SEV1C, 5C, 5D Land."— Presentation transcript:
CHAPTER 14, SECTION 3: LAND MANAGEMENT & CONSERVATION STANDARDS: SEV1C, 5C, 5D Land
What types of land are used to provide resources? Farmland Rangeland Forest land National & state parks Wilderness
Farmlands Land used to grow crops & fruit. 100 hectares of prime farmland are found in U.S. 1 hectare is a little less than 2 football fields. This land is threatened by urban development. Farmland Protection Program- helps state, county, & local governments protect farmland What will happen if we lose farmland to development? Less food Food becomes more expensive
Rangelands Land used to support non- food crops Ex: grasslands, shrublands, deserts Land is used for grazing livestock & wildlife Ex: cows, sheep, goats Threats: Overgrazing- allowing more animals to graze than the range can support. Leads to desertification- land becomes more like a desert. If fewer plants then no roots to hold soil- leads to erosion.
Rangelands (continued) Management: Most rangeland is public land and is managed by federal government. Government leases land to ranchers. Land is fenced & herds must be rotated to prevent overgrazing and give plants a chance to recover. Herd size may also be limited.
Forest Lands Harvesting Trees Used for: Paper Lumber Furniture Fire wood as fuel source Maple syrup Turpentine Ecosystem services provided by trees: Remove CO2 from air. Add O2 to the air Temperature regulation
Forest Lands 3 types of forest lands: 1. Virgin forest- never been cut 2. Native forest- trees planted & managed 3. Tree farms- planted in rows & harvested like crops 2 methods to harvest trees: 1. Clear cutting- remove all trees from an area of land Causes erosion & loss of wildlife habitat 2. Selective cutting- cutting only middle-aged or mature trees. More expensive but less destructive
Forest Lands Deforestation Clearing trees without replacing them. Reduces wildlife habitats Causes soil erosion when tree roots removed from soil Especially bad in rainforest where soil is thin and high level of rainfall washes soil away. Positive feedback loop: Farmers slash & burn forest. Loss of tree roots and heavy rain causes soil erosion Farmers slash & burn some more trees. Cycle continues.
Forest Lands Reforestation When farms abandoned, area of land will regenerate forests through secondary succession. Some reforestation projects required when trees harvested from public land.
Parks & Preserves 1870’s first national park created- Yellowstone National Park. 50 national parks across the US- most are out west Public lands owned by the government can be leased to private companies and used for Logging Mining Ranching Government can also maintain these public lands as Wildlife refuges Hunting & fishing areas
Wilderness Areas Land is protected from ALL exploitations. Cannot build roads, buildings, or use motorized equipment in these areas Used for hiking, fishing, camping, non-motorized boating (canoe or kayak)
Benefits of Parks/Preserves/Wilderness Areas Protecting ecosystems will preserve species & prevent extinctions Provide recreational areas for people to relieve stress Outdoor classrooms & research facilities where we can learn more about natural world
Threats to Parks/Preserves/Wilderness Areas When there are too many visitors at one time… Leave litter behind Cause traffic jams (air pollution) Trample plant life Climate change can alter the plant life & hibernation cycles of animals Invasive species crowd out native wildlife/plants Measures taken to protect these areas include: Limiting # of visitors Closing areas during animal mating seasons Volunteer programs to help clean & maintain parks
You should be able to… Explain what reforestation is and why it is important. List & explain two methods of managing rangelands sustainably. Describe the function of parks & wilderness areas. Describe the environmental effects of deforestation. Explain the benefits of preserving farmland.