Shifts in metabolic scaling, production, and efficiency across major evolutionary transitions of life

DeLong, J. P., Okie, J. G., Moses, M. E., Sibly, R. M. ORCID: https://orcid.org/0000-0001-6828-3543 and Brown, J. H. (2010) Shifts in metabolic scaling, production, and efficiency across major evolutionary transitions of life. Proceedings of the National Academy of Sciences of the United States of America, 107 (29). pp. 12941-12945. ISSN 0027-8424 doi: 10.1073/pnas.1007783107

Abstract/Summary

The diversification of life involved enormous increases in size and complexity. The evolutionary transitions from prokaryotes to unicellular eukaryotes to metazoans were accompanied by major innovations inmetabolicdesign.Hereweshowthat thescalingsofmetabolic rate, population growth rate, and production efficiency with body size have changed across the evolutionary transitions.Metabolic rate scales with body mass superlinearly in prokaryotes, linearly in protists, and sublinearly inmetazoans, so Kleiber’s 3/4 power scaling law does not apply universally across organisms. The scaling ofmaximum population growth rate shifts from positive in prokaryotes to negative in protists and metazoans, and the efficiency of production declines across these groups.Major changes inmetabolic processes duringtheearlyevolutionof life overcameexistingconstraints, exploited new opportunities, and imposed new constraints. The 3.5 billion year history of life on earth was characterized by

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/25651
Item Type	Article
Refereed	Yes
Divisions	Life Sciences > School of Biological Sciences > Ecology and Evolutionary Biology
Uncontrolled Keywords	energetic constraints; production efficiency; rmax; endosymbiosis; multicellularity
Publisher	National Academy of Sciences
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