5 biosphere partb

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    !"#$%"$#& (& )* +,-!./0#& 

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    G'(5.)

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    $.) &'(5.)

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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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    O-(2107.1-) *-'5%'-.)

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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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    R(6)(55%7.1-) *-'5%'-.)

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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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    RM09. 2. 9V%N(7.

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    F2GCB3> @5 EHCI375 I_! ! _

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