Forest Destruction Chapter 11.5 – 11.6 Forest Destruction Chapter 11.5 – 11.6 Kevin Arocha Steven Marquez.

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Presentation transcript:

Forest Destruction Chapter 11.5 – 11.6 Forest Destruction Chapter 11.5 – 11.6 Kevin Arocha Steven Marquez

U.S. Forests : Cutting Down Wood The GOOD news : Forests cover more area now than they did in 1920 ! More wood is actually grown per year than is cut, and the U.S. has an active role in protecting many forest lands. The NOT SO GOOD news: Since the 1960’s the chopping down of the nation’s remaining old growth forests have significantly gone up. Although being replaced with biologically simplified tree plantations, researchers argue that it disrupts the ecosystem, such as energy flow and chemical cycling.

Forest Destruction: Reducing Harmful Effects of Insects Forest destruction due to insects and diseases can be dramatically reduced by simply inspecting imported Timber, removing diseased and infected trees, and by using chemicals and natural predators to help control insect pests.

U.S. Forests : Common Diseases Sudden Oak Death Beech Bark Disease Pine Shoot Beatle

Types of Forest Fires Surface fires : Usually only burn undergrowth and leaf litter on the forest floor. These may kill seedlings and small trees but spare most of the big boys and animals. Crown Fires : Extremely hot fires, start on the ground and build up, eventually burning entire trees. These kill most vegetation, wildlife, increase soil erosion, and burn/ damage human structures in the way. Ground Fires : Surface fires that go underground and burn up decayed leaves or peat.

Tropical Deforestation Causes Deforestation is when large areas of ecologically important tropical forests are being cleared and degraded at a fast rate. Top 5 Causes : 1. Population Growth 2. Poverty 3. Government Policies 4. Exports 5. Not valuing ecological services

Tropical Deforestation Solutions Protect most diverse and endangered areas Educate settlers about sustainable agriculture and forestry Phase out subsidies that encourage unsustainable forest use Reduce illegal cutting Slow Population growth

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