Forests: 11.4Forests: 11.4By: Yadam Conde, 7143481

Nahara Ramos, 7255161 By: Yadam Conde, 7143481

Nahara Ramos, 7255161 http://www.babble.com/CS/blogs/strollerderby/2008/01/08-15/redwood-forest.jpg

Types of Forests

• Old-Growth Forests:

• An uncut forest or regenerated forest that has not been seriously disturbed by human activities for several hundred years.

• Second-Growth Forests:

• Forest after secondary succession.

• Tree Plantations/Tree Farms:

• A managed tract with uniformly aged trees of one species that are harvested by clear cutting as soon as they become commercially valuable.

http://www.steeleschristmastreefarm.com/Luke_s_Camp_077_800x600.jpg

Forest Management

• 2 Major Type

• Even-Aged Management

• Same age and size for multiple species of trees in the area. This is called Tree Plantations and Industrial Forestry.

• Uneven-Aged Management

• Variety of species, size and ages. The goals are usually biological diversity, long term production of timber, wildlife, and recreation.

Tree Harvesting methods

• Selective Cutting

• Shelter Wood Cutting

• Seed Tree Cutting

• Clear Cutting

• Strip Cuttinghttp://concrete-entertainment.com/wp-content/uploads/2010/05/IMG_4183.jpg

Tree Harvesting Methods

Clear-Cutting Seed-Tree CuttingShelter-Wood Cutting

Selective-Tree Cuttinghttp://www.maineforestry.net/Forestry%20Items/timber_hvt_methods.htm

What’s Going on with our Forests?

• Over the past 8,000 years human activity has cut down 20-50% of original forests.

• Since 1990 we lost 0.5% of forests cover a year.

http://www.askgeorgeyeo.com/panic.jpg

Solution!• Grow more timber on long rotations

• Rely more on selective harvesting then strip harvesting.

• Certify timber grown by sustainable methods

• Include ecological services of trees and forests in estimating economic value.

• Reduce road building into uncut forests areas.

http://www.georgianc.on.ca/news/wp-content/uploads/2009/01/green-light-bulb4-300x342.jpg

What Should i study????

Types of Forests: Old Growth, Second Growth, Tree Plantations

Harvesting Methods: Selective Cutting, Shelter Wood Cutting, Seed Tree Cutting, Clear Cutting, Strip Cutting

Forests Sustainability Profit

Solutions

Figure 11.7 - 11.13

Top 5 Things to Study!!!

References

• http://www.maineforestry.net/Forestry%20Items/timber_hvt_methods.htm

• http://nwpwa.allegheny.edu/harvestingtechniques.htm

• Miller living in the Environment 14 Edition