chapter 16.5 conservation

of 29 /29
Chapter 16.5 Conservation

Author: grant-henry

Post on 30-Dec-2015




0 download

Embed Size (px)


Chapter 16.5 Conservation. KEY CONCEPT Conservation methods can help protect and restore ecosystems. Improving The Environment. If population growth and environmental pollution are not slowed down, they will become limiting factors for our species, as well as other species. - PowerPoint PPT Presentation


  • Chapter 16.5Conservation

  • KEY CONCEPT Conservation methods can help protect and restore ecosystems.

  • Improving The EnvironmentIf population growth and environmental pollution are not slowed down, they will become limiting factors for our species, as well as other species.

  • Conservation of Natural ResourcesConservation involves the protection and wise use of our natural resources.Natural Resources include the basic things in the natural worldSoilWaterAirEnergyWildlifeOpen Space

  • Wildlife PreservationEfforts are being made to help endangered species and to protect other forms of wildlife.Endangered species also have protected habitats provided by wildlife refuges and national parks.Laws have been passed regulating overhunting and overfishing to protect various species.

  • Sustainable development manages resources for present and future generations.Sustainable development meets needs without hurting future generations.resources meet current needsresources will still be available for future use

  • The timber industry has started to adopt sustainable practices.Global fisheries have adopted several sustainable practices.rotation of catches fishing gear review harvest reduction fishing bans

  • Conservation practices focus on a few species but benefit entire ecosystems.

  • Environmental LawsGovernmental agencies have begun to take responsibility for environmental protection by passing laws to stop pollution.Freshwater Wetlands ActHazardous Waste Disposal RegulationsAir Pollution Control LawsState Environmental Quality Review ActReturnable Container LawEndangered Species Act

  • The Endangered Species Act works to protect individual species from extinction.A listed species is often called an umbrella species.the habitat in which the species lives must be protectedother species are protected because they share the ecosystem

  • Protecting Earths resources helps protect our future. The Environmental Protection Agency (EPA) was created in 1970.The EPA develops policies and regulations to protect the environment.Legislation helps to protect the environment and endangered species.Clean Air ActClean Water ActEndangered Species Act

  • The National Park Service helps manage public lands.The park system includes over 390 areas, covering 84 million acres.

  • There are several ways that people can help protect the environment.control population growthprotect and maintain ecosystemsdevelop sustainable technology and practices

  • Human Impact

    Land ResourcesForest ResourcesOcean ResourcesAir ResourcesWater ResourcesOzone DepletionGlobal warming

  • Land ResourcesWhat happening?Plowing removes the roots that hold the soil in place, increasing the rate of Soil erosionSOIL EROSION is the wearing away of surface soil by water and wind.Desertification- the process of turning once productive areas into deserts from a combination of farming, overgrazing, and drought.

  • Land Resources

    Why is it a problem?Soil is a renewable resource, however it can be permanently damaged if mismanagedWhat is being done?Contour plowing- fields are plowed across the slope of the land to reduce erosionLeaving stems and roots of the previous years crops in place to hold soil

  • Forest ResourcesWhat is Happening?Deforestation- loss of forest which leads to severe erosion

    Why is this a problem?Old growth forest can be considered a nonrenewable resource because it would take centuries to reproduceForests provide O2 and remove CO2 from the atmosphereThey also store nutrients and provide food and habitat to organisms

  • Forest ResourcesWhat is being Done?Tree farms can be planted and harvested efficiently making them fully renewable resourcesTree geneticists are also breeding new, faster-growing tree varieties that produce high- quality wood.

  • Ocean ResourcesWhat is happening?Overfishing- fish stocks in many fisheries are being harvested faster than they reproduce.Why is this a problem?People depend on the ocean as a major source of protein, both from finfish and from shellfishWith the amount of fish caught each year increasing the fish cannot reproduce fast enough to keep up

  • Ocean ResourcesWhat is being done?Limiting the catch of fish Certain fishing grounds have been temporarily closedAquaculture- farming of aquatic organisms

  • Air ResourcesWhat is happening?Smog- a mixture of chemicals that occurs as a gray-brown haze in the atmosphere.This is due primarily to automobile exhausts and industrial emissionsPollutant- a harmful material that can enter the biosphere through air, land or waterThe burning of fossil fuels can release pollutants that cause smog and other problems in the atmosphere.

  • Air Resources

    Why is it a problem?This leads to toxins that enter the mouth, nose and lungs causing health problems over the long term.Gases released from the burning of fossil fuels combine with water vapor to form ACID RAINAcid rain kills plants, and changes the chemistry of soils

    What is being done?Technology to control emissions from factory smokestacksStrict automobile emission standards and clean air regulations

  • Water ResourcesWhat is happening?Pollution such as OIL SPILLS threatens our water supplyImproperly discarded chemicals can enter streams and riversDomestic sewage entering or water ways causing increase in bacteria growth

  • Water ResourcesWhy is this a problem?Fresh water is used daily for everything from drinking and washing to watering crops and making steel.Although water is a renewable resource, the total supply of fresh water is limitedWhat is being done? Conservation by: drip irrigation, and consumer awareness of conservation

  • Ozone DepletionWhat is happening? Chemicals called CFCs which were once widely used in aerosol cans, the production of plastics and as coolants in freezers, refrigerators and air conditioners have caused a hole in our ozone layer and this hole is continuing to grow

  • Ozone DepletionWhy is this a problem?The ozone layer absorbs a great deal of harmful UV rays before it reaches the earths surface . As the ozone layer is depleted UV exposure can cause sunburns, cancer, eye damage and decrease an organisms resistance to diseaseWhat is being done?The US has joined many other nations to phase out the use of CFCs

  • Global WarmingWhat is happening?An increase in the average temperature of the biosphere.Over the past 120 years global temperatures have risen .5 degrees CelsiusCO2 and other gases are being released into the atmosphere and being retained causing more heat.

  • Global WarmingWhy is this a problem?Polar ice caps will continue to melt and could rise enough to flood some low lying coastal areasStorms and other weather disturbances could become more frequent and severeHeat favors rodents weeds and insect that reproduce and spread quickly

    What is being Done?Alternate energy sources are being researched to reduce or stop the burning of fossil fuels that release gases into the atmosphere that retain heat.