| Term | Definition |
|---|
| found? | in equaorial areas, s america, africa, asia |
| what is the mean temp? | 18? |
| precipitation? | more than 2500mm |
| what is the forest like | all aged, multi layered, generlayy 3 layers( trees, shrubs, ground layer) |
| vegetation? | vegetation may occupy all of the growing space verticall andy horizontally |
| Characteristics of mant tropical trees? | having buttressed trunks, large leaves in lower stata of the forest, smaller in the upper. leaves with drip tips, thin bark, fruits |
| explain how tropical rainforests are very diverse biologically? | 60% of all plant species, 80% of all insect species, 90 % of all primates, houndreds of thousands species yet to indentify |
| how many tree species per Ha, how many are cvomercially useful? | 50-100 species pr Ha, which only 1- 2 may be of commercial importance |
| how many species in th peruvian amazon? | 300 species per haa |
| how many species in the kalimantan? | 700 per Ha |
| tropial forests in SE asia are? | less diverse |
| productivity? | 0,3 - 0.5 m3/Ha/annum MAYBE |
| what about the soils? | generally infertile, due to heavily leached , little accumulation due to rapid bacterial breakdown 7-8 months |
| how big is the amazon? | 50 billion m3 of timber |
| how much gets cut gown each year? | 4million m3 |
| result of deforesration? | is because of rising population |
| why clearing forest in amazon? | mining and infrastructure |
| what happends when an area is cleared? | vegetation do not regenerate easily, do not retain their original structure an dcomposition |
| what happends when nutrients leach from soils that are already nutrient deficient? | soils become compaced and harden. water logging and erosion occur |
| what else happens to cleared tropical rainforest areas? | they freqently rvert to grasslands and derived savannah typified by palms and shubs |
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