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Page 1: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

17 Land Resources

Page 2: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Overview of Chapter 17

Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and Coastal Areas Conservation of Land Resources

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 3: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Land Use- Worldwide

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 4: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Land Use - United States

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 5: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Land Use - United States

55% of US land is privately owned Remainder of land is owned by government

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 6: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Managing Public and Private Land

Public Planning and Land Use Land use decisions are complex with multiple

effects Must take into account

All repercussions of proposed land use Ecosystem services of undeveloped land

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 7: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Wilderness Parks and Wildlife Refuges

Wilderness A protected area of land in which no human

development is permitted Wilderness Act (1964)

© 2012 John Wiley & Sons, Inc. All rights reserved.

Set aside federally owned land

Managed by NPS, USFS, FWS, &BLM

Page 8: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

National Park System

Created in 1916 Currently includes 58

parks Primary goal

Teach people about the natural environment, management of natural resources and history of a site

Yosemite National Park

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 9: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

National Park System

Threats to U.S. Parks Crime & Vandalism Traffic jams Pollution of the soil, water and air Resource violations

Natural Regulation Policy to let nature take it course No culling wildlife or suppressing wildfire

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 10: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Wildlife Refuges

National Wildlife Refuge System 1903, Theodore Roosevelt Most extensive network of lands and waters

committed to wildlife habitat in the world 533 refuges nationwide

Represent all major ecosystems found in US Mission

To preserve lands and waters for the conservation of fishes, wildlife and plants of the US

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 11: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Forests

Role in Hydrologic Cycle (right)

Forest Management Deforestation Forest Trends in the

US Trends in Tropical

Forests Boreal Forests

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 12: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Forest Management

Traditional Forest Management Low diversity-

monocultures Managed for timber

production

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 13: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Forest Management

Ecological Sustainable Forest Management Environmentally balanced Diverse trees Prevent soil erosion Preserve watersheds Wildlife corridors- unlogged

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 14: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Harvesting Trees

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 15: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Deforestation

Temporary or permanent clearance of large expanses of forest for agriculture or other use

World forests shrank 32 million acres annually from 2000–2010

Causes Fire Expansion of agriculture Construction of roads Tree harvest Insect and disease

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 16: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Deforestation

Results of Deforestation Decreased soil fertility Uncontrolled soil erosion Production of hydroelectric power (silt build up

behind dams) Increased sedimentation of waterways Formation of deserts Extinction of species Global climate changes

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 17: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Forest Trends in US

Most temperature forest are steady or expanding

Returning stands lack biodiversity of original forests

More than half of US forest are privately owned (right) Forest Legacy Program Conservation easement

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 18: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

US National Forests

Managed for multiple uses Timber harvest Livestock forage Water resource and watershed protection Mining, hunting, fishing, etc.

Road building is an issue Provides logging companies with access to forest

Clear cutting is an issue

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 19: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Case-In-Point Tongass National Park

One of world’s few temperate rainforests

Prime logging area Modified 1997 Forest

Plan Roadless Area

Conservation Rule (2000)

Politics rules government agencies

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 20: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Trends in Tropical Forests

Tropical rainforests (below) and tropical dry forests

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 21: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Disappearing Tropical Rain Forests

Immediate causes Subsistence agriculture Commercial logging Cattle ranching

Other causes Mining Hydroelectric power

© 2012 John Wiley & Sons, Inc. All rights reserved.

Human Settlement in a Brazilian Tropical Rain Forest

Page 22: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Disappearing Tropical Dry Forests

Primarily destroyed for fuel wood Used for heating and cooking

Led to fuel crisis in many countries Increase in waterborne diseases (cooking water

is not boiled)

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 23: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Boreal Forests

World’s largest biome

Extensive clear cutting Primary source of

world’s industrial wood and wood fiber

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 24: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Rangeland and Agricultural lands

Rangeland Land that is not intensively managed and is used

for grazing livestock

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 25: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Rangeland Degradation and Deforestation Overgrazing leaves ground barren

Animals exceed land’s carrying capacity Land degradation

Natural or human-induced process that decreases future ability of land to support crops or livestock

Desertification Degradation of once fertile land into

nonproductive desert

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 26: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Rangeland Trends in US

Make up 30% of total US land area Pressure from developers to subdivide Public rangeland managed by:

Taylor Grazing Act (1934) Federal Land Policy and Management Act (1976)

Conditions of public rangeland are slowly improving

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 27: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Agricultural Land

US has 300 million acres of prime farmland Suburban sprawl

Parking lots Housing

developments Shopping malls

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 28: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Wetlands

Lands that are usually covered with water for at least part of the year

Have characteristic soils, and water-tolerant vegetation

Benefits Habitat for migratory waterfowl and wildlife Recharge groundwater Reduce damage from flooding Improve water quality Produce many commercially important products

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 29: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Human Threats to Wetlands

Drainage for agriculture or mosquito control Dredging for navigation Construction of dams, dykes or seawalls Filling in for solid waste disposal Road building Mining for gravel, fossil fuels, etc. Shrinking 24,300 acres per year since 1985

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 30: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Protection of Wetlands

Clean Water Act (1972) No clear definition of wetland

Emergency Wetlands Resource Act (1986) Corp of Engineers Manuals Opponents of wetland protection find it

infringes on use of privately-owned land

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 31: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Coastlines

Coastal wetlands Provide food and habitat for many aquatic

animals Historically regarded as wasteland

US starting to see importance of protecting this environment Retaining seawalls

(right)

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 32: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Coastal Demographics

Many coastal areas overdeveloped 3.8 billion people live within 150km of coastline 6.0 billion people will likely live there by 2025

United States 14 of 20 largest US cities along coast 19 of 20 most densely populated countries along

coasts

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 33: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Conservation and Land Resources

Four criteria of importance of conservation: Areas lost or degraded since European

colonization Number of present examples of a particular

ecosystem (or the total area) Estimate of the likelihood that a given ecosystem

will lose significant area or be degraded in next 10 years

Number of threatened and endangered species living in the ecosystem

© 2012 John Wiley & Sons, Inc. All rights reserved.

Page 34: 17Land Resources. Overview of Chapter 17 Land Use Wilderness Park and Wildlife Refuges Forests Rangeland and Agricultural Land Wetlands and

Conservation and Land Resources

© 2012 John Wiley & Sons, Inc. All rights reserved.


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