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Unformatted text preview: new discoveries and descriptions occur regularly
• Many extremophiles but also many that live in “normal conditions
•Thrive in very hot environments
e.g. Yellowstone geysers
e.g. Oceanic hydrothermal vents Enzymes work in extreme conditions possibly useful for industry. 39 Archaea Diversity Halophiles:
• Survive in very high salinity
• Some die in low salinity Methanogens: Acidophiles: • Use CO2 to oxidize H2.
• Release methane (CH4)
• marsh gas.
•O2 very toxic • Recently discovered group
• Smallest organisms known Bacteria 40 How many species?
~9000 named/described so far
400 spp 500 spp 41 Bacteria
skin cells 1 trillion
on skin Enterococcus Faecium
Bacteria on Human Skin 42 Bacteria
skin cells 100 trillion
in GI tract Staphylococcus aureus
Bacteria adhering to nasal cilia Bacteria 43 How abundant? Billions! Bacteria 44 How abundant?
found in a...
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