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Title: Geophysiology  
Author: World Heritage Encyclopedia
Language: English
Subject: Gaia hypothesis, Earth immune system, Earth, Biometeorology, Ecology
Collection: Earth, Ecology
Publisher: World Heritage Encyclopedia


Geophysiology (Geo, earth + physiology, the study of living bodies) is the study of interaction among living organisms on the Earth operating under the hypothesis that the Earth itself acts as a single living organism.

The term "geophysiology" was popularized by Huxley (1825-1895), but is disputed today. An analogous alternative geophysiology which views the Earth as a single cell was developed by Lewis Thomas in his The Lives of a Cell: Notes of a Biology Watcher (1974).

emergence of life on earth was congruent with respect to the appearance of primordial nutrient cycles; iv) that in addition to the evolution of species there exists a separate process of ecological evolution the direction of which is predetermined by community composition and dynamics (Lekevičius, 2006).

Frederic Clements (1874-1945) of the Carnegie Institute of Washington, who popularized the idea of vegetation climax also introduced the idea of physiology to ecology, considering the interlocking natures of plants and animals as metabolic processes within a single superorganism.

The British biologist, Arthur Tansey (1871-1955), who introduced the term ecosystem, also considered the possibility that plant communities could be considered to be boundary-less quasi-organisms, although he never extended his ideas to a planetary scale.

G. Evelyn Hutchison, studied the way logistic growth, biological feedback systems and self-regulation tended to explain many of the features of ecological systems, and Raymond Lindeman has further extended the way energy flows between various trophic levels in his "trophic-dynamic" model, further developed by Mark McMenamin and Dianna McMenamin's thesis of "Hypersea", which looks at the rate of water flow through the Gaian biological environment. Tyler Volk, has also looked at the trophic cycling of various elements upon which life depends, and argues that this is central to an understanding of geophysiology. Toby Tyrrell has however argued[1] that neither the Gaia hypothesis nor the idea that the Earth is (in any meaningful way) a superorganism are supported by the available scientific evidence.

Eugene Odum believed that homeostasis and stability in ecosystems was a result of evolutionary processes, and Howard Odum (his brother) extended this work to include thermodynamic effects in producing ecological "steady states". Howard Odum also extended the nature of the scale of ecosystems from that of a single pond upwards, showing that a "nested hierarchy", "heterarchy" or "holarchy" existed in which systems could be considered as elements of larger systems (leaf to tree to glade to forest to bioregion to biotic realm or biomes). On the basis of this, Gaia theory and geophysiology represent the ultimate extension of these principles.

See also


  1. ^ Tyrrell, Toby (2013), On Gaia: A Critical Investigation of the Relationship between Life and Earth, Princeton: Princeton University Press,  
  • Lekevičius, Edmundas (2006) "The Russian paradigm in ecology and evolutionary biology: Pro et contra. Acta Zoologica Lituanica 16(1), 3-19.
  • Lovelock, James (2001) "Gaia: the practical science of planetary medicine" (Oxford Uni Press) ISBN 0-19-521674-1
  • Volk, Tyler (1997) "Gaia's Body: Towards a Physiology of Earth" (Copernicus Books) ISBN 978-0-387-98270-0
  • McMenamin Mark A.S. & Dianna L. S. McMenamin (1996) "Hypersea: Life on Land" (Columbia Uni Press) ISBN 0-231-07531-6
  • Zavarzin, G. A. 1995. Paradigm change in biology. Vestnik RAN 65(1), 8-23.
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