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Related Experiment Videos

Modeling microbial consortiums as distributed metabolic networks.

Joseph J Vallino1

  • 1Ecosystems Center, Marine Biological Laboratory, Woods Hole, Massachusetts 02543, USA. jvallino@mbl.edu

The Biological Bulletin
|April 18, 2003
PubMed
Summary

Biogeochemistry studies Earth's mass and energy cycles, influenced by microbial life and thermodynamics. This research explores if fundamental forces or specific organisms drive these cycles, using a new modeling framework.

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Area of Science:

  • * Biogeochemistry and Microbial Ecology
  • * Environmental Science and Thermodynamics

Background:

  • * Biogeochemistry investigates the cycling of mass and energy by biological and abiotic processes across scales.
  • * Anthropogenic impacts significantly alter global biogeochemical cycles, necessitating a deeper understanding of their function and response.
  • * Microbial processes are central to biogeochemistry, often adhering to thermodynamic principles and exploiting environmental chemical potentials.

Purpose of the Study:

  • * To investigate whether observed biogeochemistry is dictated by fundamental forces or by the specific organisms present in an ecosystem.
  • * To explore the role of nonequilibrium thermodynamics (NET) in understanding biogeochemical processes.
  • * To develop and utilize a modeling framework for analyzing microbial consortiums as distributed metabolic networks.

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Main Methods:

  • * Review of existing literature on biogeochemistry, microbial processes, and thermodynamics.
  • * Application of nonequilibrium thermodynamics (NET) principles.
  • * Development of a modeling framework representing microbial consortiums as inter-species metabolic networks.

Main Results:

  • * Evidence suggests biogeochemical cycles may be governed by fundamental thermodynamic forces rather than solely by the organisms present.
  • * Microbial communities appear to evolve to exploit available chemical potentials, as seen in anaerobic oxidation processes.
  • * A novel modeling framework has been developed to analyze microbial consortiums.

Conclusions:

  • * The study supports the hypothesis that fundamental forces, informed by NET, may determine biogeochemistry.
  • * Advances in genomics and NET provide tools to explore microbial roles in biogeochemical cycling.
  • * The developed model, combined with experimental data, will test hypotheses about how living systems function within biogeochemical cycles.