BIOL 111 Lecture Notes - Chlorophyll, Homeostasis, Botulism
4 Apr 2012
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BIOL 111 Full Course Notes
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08/09/12: genetic variation (gene level, species compostion (species diversity, interactions with ecosystem (abiotic/biotic, across and. More diverse environments are healthier (eg. purify water, detox) within) Species diversity: number of species in a habitat as well as their relative abundance. Edwin (1983) tree fogging: chose a tree in the amazon, covered it and killed everything in symbiosis with it, finding: 160 beetle species unique to that particular type of tree. 3 to 100 million eukaryotic species living today. Bacteria and archaea numbers are unknown (~10 000 bacteria identified, but could be millions to 100 millions) Area: in general, doubling sample area increases number of species by 10-25% (more area = more species) Climate: warm, wet areas have more species for reasons unknown (eg. tropics are more diverse near equator: warmer, wetter support diversity) Human have a bias towards the study of plants and vertebrates, though these are not the most diverse, genetically, functionally nor by species:
