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CHAPTER 14, SECTION 3: LAND MANAGEMENT & CONSERVATION STANDARDS: SEV1C, 5C, 5D Land.

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Presentation on theme: "CHAPTER 14, SECTION 3: LAND MANAGEMENT & CONSERVATION STANDARDS: SEV1C, 5C, 5D Land."— Presentation transcript:

1 CHAPTER 14, SECTION 3: LAND MANAGEMENT & CONSERVATION STANDARDS: SEV1C, 5C, 5D Land

2 What types of land are used to provide resources? Farmland Rangeland Forest land National & state parks Wilderness

3 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

4 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.

5 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.

6 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

7 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

8 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.

9 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.

10 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

11 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)

12 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

13 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

14 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.


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