BIOL 117 Lecture 24: Chapter 24 - Climate
23 Jul 2016
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Tropical rainforest: temp varies little little (average between 25-27c). 80% of world"s species: diverse vegetation, soil, species, very thick canopy, not jungle as lead to believe. Little light reaches forest oor, not dense vegetation: 1/4 medications used today come only from rainforest. Tylenol, aspirin, ibuprofen all discovered in rainforest. Some can be created in lab, some can only be found in rainforest. Rosie periwinkle: cures 99% of particular leukemia. Savanna: wet season for half year, dry season for half year. Intertropical convergence zone switches dry seasons for n and s: serengeti in africa (means vast plain). 70 species of mammals and 500 species reside here. Desert: evaporation and transpiration by plants is much greater than precipitation, very occasional wet season (about 1 week to 1 month). Very drastic temperature variation (0s to 100s very easily: majority around 23. 5-30 degrees n/s latitude, sonoran desert: sw usa in mexico.
