sustainable management and conservation

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  • Created by: vezting
  • Created on: 24-04-16 13:03
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  • sustainable management and conservation
    • coppicing
      • involves cutting a deciduous tree at the trunk close to the ground so it can eventually re-grow
      • to provide a continuous supply of wood rotational coppicing should be done
        • the woodland is split into sections and each year a different one is coppiced
        • each year there will be a supply of mature/ ready trees
        • is good for biodiversity as woodland left unmanaged successsion happenes and sunlight doesnt reach the ground, reducing biodiversity
    • pollarding
      • like coppicing but the trunk is cut higher up
      • usefull when population of deer is high. newly growing shoots cant be reached and so the tree can re-grow
    • clear felling
      • this is large scale and involves removing all the trees in one area
      • this removes species that arent needed and destroys habitats
      • this reduces soil minerals and soil is susceptible to erosion water becomes polluted and woodlands take 50-100 years to regrow
    • selective cutting
      • only removing the largest trees. and the trees that are needed
      • trees should be replanted, and given enough room to grow, fast growing species should be planted pests and pathogens controlled
    • threatened biodiversity
      • over- exploitation for food and commerce. faster than they can replenish themselves
      • habitat destructio  and fragmentation results from farming practices, increased pollutions and building
      • species introduced may out-compete native species causing extinction. this can be accidentally or purposfully
    • reasons to conserve
      • ethical: species have the right to survive
      • many species are valuable food resource
      • genetic diversity in wild species may be needed to breed for disease resiistance, drought tollerance or higher yield
      • not everything should be domesticated
      • natural environments are benficial as many drugs are found in plants
      • natural predators or pests can act as control agents


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