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
- coppicing
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