Lecture 16 Biogeochemical Cycling Flashcards
1
Q
Describe Carbon Cycling
A
- oxidized -CO, CO2
- reduced - organic matter, methane -CH4
- photosynthesis fixes CO2 into biomass
- microbes fix 1/2 of worlds C
- produces O2 and organic compounds
-Organic compounds oxidized back to CO2 by
-Respiration = Glycolysis + TCA + ETC
and Fermentation
2
Q
What Carries out Methanogenesis?
A
Methanogens
-Some methanogens live in symbiosis with termites and ruminants
3
Q
Methanogenesis
A
- biological production of methane (CH4)
- Energy reducing CO2 to CH4
4
Q
What uses methane as C source, oxidize it to CO2
A
Methanotrophs
5
Q
The Nitrogen Cycle
A
look at picture
