Lecture 3

305 m3haannum high temperature lower level of

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Unformatted text preview: s  ­thinbark  ­largefleshyfruits. http://en.wikipedia.org/wiki/File:Ficus_obliqua_trunk.jpg Tropical Rain Forest   • Tropicalrainforestsareverydiversebiologically:   ­60%ofallplantspecies  ­80%ofallinsectspecies  ­90%ofallprimates  ­hundredsofthousands,possiblymillions,of speciesyettoidentify.    Tropical Rain Forest • Diversityoftropicalrainforestincludestreespecies. Hundredsofgeneraanddozensoffamiliesare representedexhibitingveryheterogeneous 混杂多样的 characteristics.  ­ 6000treespeciesinBrazilianAmazon.50 ­100 differenttreespeciesperhectareofwhichonly1or 2maybeofcommercialimportance. definition for that changes daily  ­ 300speciesperhectarehavebeenrecordedin PeruvianAmazon.  ­700speciesperhectareinKalimantan (approximatelythesamenumberasinthewholeof NorthAmerica) Tropical Rain Forest  ­ TropicalforestsofS.EAsiaarelessdiverse thanotherequatorialregionshavingahigh proportionofDipterocarpusspecies.   ­ Tropicalforestsgenerallyexhibitlow commercialproductivityofonly0.3 ­0.5 m3/ha/annum.   high temperature, lower level of nutrients Tropical Rain Forest  Soils:    ­generallyinfertile  ­deeplyweatheredandheavily leached   过滤效...
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