Presentation is loading. Please wait.

Presentation is loading. Please wait.

17 Land Resources.

Published byMiloslav Mareš Modified over 5 years ago

Similar presentations

Presentation on theme: "17 Land Resources."— Presentation transcript:

1 17 Land Resources

2 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.

3 Land Use- Worldwide © 2012 John Wiley & Sons, Inc. All rights reserved.

4 Land Use - United States
© 2012 John Wiley & Sons, Inc. All rights reserved.

5 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.

6 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.

7 Public Lands National Parks- managed for scientific, educational, and recreational use, and sometimes for their beauty or unique landforms. Managed Resource Protected Areas- managed for the sustained use of biological, mineral, and recreational resources. Habitat/Species Management Areas- actively managed to maintain biological communities. Strict Nature Reserves and Wilderness Areas- established to protect species and ecosystems. Protected Landscapes and Seascapes- nondestructive use of natural resources while allowing for tourism and recreation. National Monuments- set aside to protect unique sites of special natural or cultural interests.

8 Wilderness Parks and Wildlife Refuges
A protected area of land in which no human development is permitted Wilderness Act (1964) Set aside federally owned land Managed by NPS, USFS, FWS, &BLM © 2012 John Wiley & Sons, Inc. All rights reserved.

9 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.

10 National Park System Threats to U.S. Parks Natural Regulation
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.

11 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.

12 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.

13 Forest Management Traditional Forest Management
Low diversity- monocultures Managed for timber production © 2012 John Wiley & Sons, Inc. All rights reserved.

14 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.

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

16 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.

17 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.

18 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.

19 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.

20 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.

21 Trends in Tropical Forests
Tropical rainforests (below) and tropical dry forests © 2012 John Wiley & Sons, Inc. All rights reserved.

22 Disappearing Tropical Rain Forests
Immediate causes Subsistence agriculture Commercial logging Cattle ranching Other causes Mining Hydroelectric power Human Settlement in a Brazilian Tropical Rain Forest © 2012 John Wiley & Sons, Inc. All rights reserved.

23 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.

24 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.

25 Rangeland and Agricultural lands
Land that is not intensively managed and is used for grazing livestock © 2012 John Wiley & Sons, Inc. All rights reserved.

26 Rangeland Degradation and Deforestation
Overgrazing leaves ground barren (this is under study right now…. You saw the video report!) 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.

27 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.

28 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.

29 Government Policies Highway Trust Fund- a federal gasoline tax to pay for construction and maintenance of roads and highways. Zoning- a planning tool to create quieter and safer communities. For example, prohibiting the development of a factory or strip mall in a residential area. Multi-use zoning- allows retail and high-density residential development to coexist in the same area. Subsidized mortgages- low interest rates offered to people to purchase a home that would otherwise not be able to do so.

30 Smart Growth Mixed land uses
create a range of housing opportunities and choices create walkable neighborhoods encourage community and stakeholder collaboration in development decisions take advantage of compact building design Foster distinctive, attractive communities with a strong sense of place Preserve open space, farmland, natural beauty and critical environmental areas Provide a variety of transportation choices Strengthen and direct development toward existing communities Make development decisions predictable, fair and cost-effective

31 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.

32 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.

33 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.

34 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.

35 Coastal Demographics Many coastal areas overdeveloped United States
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.

36 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.

37 Conservation and Land Resources
© 2012 John Wiley & Sons, Inc. All rights reserved.

Download ppt "17 Land Resources."

Similar presentations

Chapter 18 Land Resources

Chapter 18 Land Resources
Chapter 14, Section 3: Land Management & Conservation

Chapter 14, Section 3: Land Management & Conservation
Land Section #3: Land Management & Conservation. Farmlands land used to grow crops or fruit 100 million hectares in the U.S. threatened by development.

Land Section #3: Land Management & Conservation. Farmlands land used to grow crops or fruit 100 million hectares in the U.S. threatened by development.
Chapter # 18 Land Resources pg. 401 - 424. In-class Discussion Readers: Chapter # 1 - Me Chapter # 2 – David Dudley Chapter # 3 – Elisabeth Goodrich (Izzie)

Chapter # 18 Land Resources pg In-class Discussion Readers: Chapter # 1 - Me Chapter # 2 – David Dudley Chapter # 3 – Elisabeth Goodrich (Izzie)
Land. Land Use in the World US Public Lands Types of Forests 1) Old-growth (primary) forests – uncut or regenerated forest not hugely impacted by.

Land. Land Use in the World US Public Lands Types of Forests 1) Old-growth (primary) forests – uncut or regenerated forest not hugely impacted by.
Multiple choice Free response questions 50 questions # correct x 0.9 = 2 questions Question 1 _____ x 1.5 = Question 2 _____ x 1.5 = Total FRQ + MC =

Multiple choice Free response questions 50 questions # correct x 0.9 = 2 questions Question 1 _____ x 1.5 = Question 2 _____ x 1.5 = Total FRQ + MC =
Land Resources.

Land Resources.
World Forests Forests cover 30% of the world’s land surface.

World Forests Forests cover 30% of the world’s land surface.
Chapter 17 Land Resources. Overview of Chapter 17 o Land Use World land use World land use US land use US land use o Wilderness Park and Wildlife Refuges.

Chapter 17 Land Resources. Overview of Chapter 17 o Land Use World land use World land use US land use US land use o Wilderness Park and Wildlife Refuges.
Environmental Science Chapter 14 “Land”

Environmental Science Chapter 14 “Land”
Land Chapter 14. Land Use, Land Cover  _________________: farming, mining, building cities and highways and recreation  ___________________: what you.

Land Chapter 14. Land Use, Land Cover  _________________: farming, mining, building cities and highways and recreation  ___________________: what you.
Land Chapter 14.

Land Chapter 14.
Federal Regulations National Environmental Policy Act (NEPA)- mandates an environmental assessment of all projects involving federal money or permits.

Federal Regulations National Environmental Policy Act (NEPA)- mandates an environmental assessment of all projects involving federal money or permits.
Chapter 18 Land Resources. Overview of Chapter 18 o Land Use World land use World land use US land use US land use o Wilderness Park and Wildlife Refuges.

Chapter 18 Land Resources. Overview of Chapter 18 o Land Use World land use World land use US land use US land use o Wilderness Park and Wildlife Refuges.
14.3. Bellringer Land Management The main categories of rural land are farmland, rangeland, forest land, national and state parks, and wilderness. –

14.3. Bellringer Land Management The main categories of rural land are farmland, rangeland, forest land, national and state parks, and wilderness. –
17 Land Resources. Land Use – World Wide  One of the best ways to protect endangered & threated species  restore natural areas  World wide humans use.

17 Land Resources. Land Use – World Wide  One of the best ways to protect endangered & threated species  restore natural areas  World wide humans use.
Chapter 10 Land, Public and Private. The Tragedy of the Commons In 1968, ecologist Garrett Hardin described the “tragedy of the commons” Tragedy of the.

Chapter 10 Land, Public and Private. The Tragedy of the Commons In 1968, ecologist Garrett Hardin described the “tragedy of the commons” Tragedy of the.
17Land Resources. Overview of Chapter 17  Land Use  Wilderness Park and Wildlife Refuges  Forests  Rangeland and Agricultural Land  Wetlands and.

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

Chapter 18 Land Resources
Chapter 18 Land Resources and Conservation. Vocabulary  Urban- city/high density  Rural- sparsely populated areas.

Chapter 18 Land Resources and Conservation. Vocabulary  Urban- city/high density  Rural- sparsely populated areas.

Similar presentations

Ads by Google