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Distribution of National Forest Lands
- Diversity of Forest Types in U.S.
- East to West, North to South
Ownership of Forestlands
In U.S.:
Private = 58% = 100 M ha (250 M A)
Forest Industry = 14% = 24 M ha
National Forest = 18% = 31 M ha
NPS, other = 10% = 17 M ha
U.S. Forest Service (USDA)
1) administer national forest lans
2) research
3) state-level cooperation
* Use multiple-use approach & sustainable yield model
• Sustained yield concept dependent on:• Distribution of age classes• Length of rotation (harvest
cycle)• Reason for harvest (tree species)
• pulpwood vs. sawlogs
Site Index: characterize quality of stand
= size of tree after 50 years (100 years in some parts of U.S.)
> Site index = better quality stand
* Based on red oak
Controversy of Clearcuts
Pros = early successional habitat, quick, $$, tree-specific
Cons = erosion, edge effects, aesthetics, reduce diversity
Tropical Forests
• Approximately 70% of life on Earth• Huge diversity / small population size• Approximately 50% already
harvested….Amazon, Indonesia
Tropical Forests
• Chico Mendes & rubber tappers – organize reserves for nontimber products
• Murdered in 1988
“At first I thought I was fighting to save rubber trees, then I thought I was fighting to save the Amazon rainforest. Now I realise I am fighting for humanity.”
Forest Certification
• Forest Stewardship Council (FSC) – international certification that timber harvested in ecologically, socially, and economically sound manner