Land Use
World land use
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forests, grass lands and agr. cover 2/3 of areas
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1/3 land = barren lacks plant cover altogether
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11% of land mass now used for crops
Land conversions expanded mainly in past 20 to 30 yrs resulting in biodiversity
World Forests
- role in reg climate
- control run off and shelter and food for w.l
- scenic cultural and historic values
How Much Forest Is There
more then 1/2 orginal forest land has been converted to cropland (most occured in the past 200 yrs)
Forest Products
wood= active in mod economy
Non Timber Forest Benefits
source of mushrooms nuts fruits materials, habitat for wildlife havens for biodiveristy and evlouion
Forest Management
^ see voacb
2. monoculture forestry- see voacb
Tropical Forests
only occupy 10% contain more then 2/3 plant biomass and 1/2 plant and animal species
Diminishing Forests
lost between 9 mill to 12 mill ha per year from 1990 to 2000
Congo and Amazon have highest rate of deforestation because of coastal forests
Swidden Agriculture
1. Milpa- see vocab
2. mixed parrennial polyculture- “”
Logging and Land Invastions
forest destruction= reslut of logging & sub sequent invasions
Forest Protection
-parks and forest perserves
grass root level ppl work to prtect and restore
Debt-For-Nature Swaps
^see voacb
Temperate Forests
largest most destructive harvests
