Post on 06-Jul-2018
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Les biomesterrestres
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À une echèlle plus réduite apparaissent d’autres structures.
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- Diatoms- Other large phytoplankton-
Prochlorococcus- Other small phytoplankton
3%-'6. C &'(5.) E
Follows, M.J., S. Dutkiewicz, S. Grant and S.W. Chisholm,2007: Emergent biogeography of microbial communities in amodel ocean. Science, 315, 1843-1846
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The light reactions
convert the energy insunlight to chemicalenergy.
The Calvin cyclemakes sugar fromthe atoms in carbondioxide plus the
hydrogen ions andthe high-energyelectrons carried byNADPH
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RM09. 2. 9V.%1
• Le cycle de l’eau resterait cequ’il est en absence d’etresvivants
• Pas un cycle
biogeochimique!
• Energie solaire: évaporation• Retombe en forme de
précipitations• Ocean: bilan négative• Continents: bilan positive
•
Fleuves• infiltration
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RM09. 21 0%-&(6.
Carbone:
49% du poids sec des organisms,25% de la composition par atomes de la biosphèreH: 49,8%, O: 25%, C: 25%
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RM09. 2. 0%-&(6.
Principalréservoir:CO2 dissous(ioncarbonates)
Réservoiressentiel auxecosystèmesterrestres
Combustion biologique(respiration)
Combustionindustrielle
(fossiles, forets,!)
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