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Chapter 3 Living Resources

Chapter 3 Living Resources. Section 2 Forests and Fisheries Notes 3-2. Forest Resources. Many valuable things come from forests Lumber, paper pulp, rubber, etc. Trees and plants also produce oxygen and absorb carbon dioxide and other pollutants Help with erosion – holding down the soil

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Chapter 3 Living Resources

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  1. Chapter 3Living Resources Section 2 Forests and Fisheries Notes 3-2

  2. Forest Resources • Many valuable things come from forests • Lumber, paper pulp, rubber, etc. • Trees and plants also produce oxygen and absorb carbon dioxide and other pollutants • Help with erosion – holding down the soil • Help preventing flooding – absorb flood waters

  3. Forest Resources • Renewable Resources • New trees can be planted to replace cut trees • Forest Service and environmental organizations work with logging companies to maintain the forests as renewable resources

  4. Managing Forests • Logging Methods • Clear-cutting • Process of cutting down all the trees in an area at once • Quicker and cheaper • Destroys the ecosystem and exposes the soil to erosion • Selective cutting • Cutting down only some trees and leaving a mix of sizes and species behind • More expensive and time consuming • Less damage to the ecosystems and habitats

  5. Managing Forests • Sustainable Forestry • Sustainable yield: regular amount of a renewable resource that can be harvested without reducing the future supply • Replace a tree after one is cut down • Plan how frequently to cut trees • Soft wood forests can be cut more often than hard wood forests • Soft wood = pine • Hard wood = oak, cherry

  6. Managing Forests • Certified wood • If the forest is managed in a sustainable way, it can be certified. • This allows businesses and consumers to know that the wood they purchase was harvested in a way that will conserve the forest.

  7. Fisheries • Area with a large population of ocean organisms • Can be overfished • Too many fish are caught and there aren’t enough for next year to repopulate • Fisheries • Grand Banks, Newfoundland • Georges’ Banks, New England • Monterey Canyon, California

  8. Managing Fisheries • Fishing Limits • Creel Limits are set • Minimum size limit • Maximum amount • Allows fish to grow to reproduction age • Fishing Methods • Not allowed to poison fish or use dynamite • Anything that kills all fish and not just selected ones is illegal

  9. Managing Fisheries • Aquaculture • Practice of raising fish and water organisms for food • Can be found inartificial pons or bays • Ex: salmon, catfish and shrimp, etc. • Can cause pollution and spread disease into wild populations • New Resources • Find new species to fish and eat • Prevents overfishing

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