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4. forestry distrubtion and deforestation


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4. forestry distrubtion and deforestation

  1. 1. Forestry of the World
  2. 2. World Distribution of Forests
  3. 3. Northern Coniferous Belt <ul><li>Climate conditions are very cold and harsh </li></ul><ul><li>Only coniferous trees are suited to these conditions as deciduous trees are unable to survive in these conditions </li></ul><ul><li>Examples: larch birch douglas fir sitka spruce </li></ul>
  4. 4. Northern Template Belt <ul><li>Climate is mild and the soil conditions are good </li></ul><ul><li>Consists of both coniferous and deciduous trees </li></ul><ul><li>As this region is densely populated it does not contain large forest areas </li></ul><ul><li>Examples: Oak Ash Maple Sitka spruce </li></ul>
  5. 5. Tropical Rainforests <ul><li>Climate has high rainfall and high temperature </li></ul><ul><li>This area runs around the equator </li></ul><ul><li>As there are no seasons, growth occurs all year round </li></ul><ul><li>Examples: Mahogany Balsa Ebony Teak </li></ul>
  6. 6. Southern Temperate Belt <ul><li>Climate is mild and seasonal </li></ul><ul><li>Consists of both coniferous and deciduous trees </li></ul><ul><li>Less land in this region compared to others </li></ul><ul><li>Examples: Oak Beech Parana Pine Eucalyptus </li></ul>
  7. 7. Deforestation <ul><li>Deforestation is the destruction of large forests areas without replanting trees cut down </li></ul><ul><li>Timber is a renewable resource only when it is managed properly and trees replanted when cut down </li></ul><ul><li>In tropical regions forests are been cut down and not replanted </li></ul><ul><li>It is estimated areas the size of Ireland are been lost each year </li></ul>
  8. 8. Reasons for Deforestation <ul><li>Large areas cleared for farming and ranching (slash and burn technique) </li></ul><ul><li>High demand for tropical hardwood </li></ul><ul><li>Natives of some regions use timber as an economical source of fuel for heating and cooking </li></ul><ul><li>Commercial interests of large multi-national and local logging companies </li></ul>
  9. 9. Effects of Deforestation <ul><li>Slash and burning methods kill all animals, birds and insects causing many to become extinct </li></ul><ul><li>Burning of trees contributes to air pollution </li></ul><ul><li>Number of trees available to consume CO2 and produce O2 is reduced, causing the greenhouse effect </li></ul><ul><li>Effects the weather and global climate </li></ul><ul><li>Increases soil erosion in deforested areas </li></ul><ul><li>Native tribes are removed from their homes </li></ul><ul><li>Flooding – as trees consume large amounts of water their removal can cause the water table to rise </li></ul>
  10. 10. How to Prevent Deforestation <ul><li>Only use tropical woods that are grown in managed forests (for each tree cut down one is replanted) </li></ul><ul><li>Where possible use manufactured boards rather than solid tropical hardwoods </li></ul><ul><li>Try to recycle wood and wood products - paper </li></ul>