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| Titel |
The regulation of the air: a hypothesis |
| VerfasserIn |
E. G. Nisbet, C. M. R. Fowler, R. E. R. Nisbet |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 3, no. 1 ; Nr. 3, no. 1 (2012-03-12), S.87-96 |
| Datensatznummer |
250000838
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| Publikation (Nr.) |
 copernicus.org/se-3-87-2012.pdf |
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| Zusammenfassung |
| We propose the hypothesis that natural selection, acting on the
specificity or preference for CO2 over O2 of
the enzyme rubisco (ribulose-1,5-bisphosphate carboxylase/oxygenase), has controlled the
CO2:O2 ratio of the atmosphere since the
evolution of photosynthesis and has also sustained the Earth's
greenhouse-set surface temperature. Rubisco works in partnership with the
nitrogen-fixing enzyme nitrogenase to control atmospheric pressure.
Together, these two enzymes control global surface temperature and
indirectly the pH and oxygenation of the ocean. Thus, the co-evolution of
these two enzymes may have produced clement conditions on the Earth's
surface, allowing life to be sustained. |
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