What is the hypothesis of Gaia ?

Summary The Gaia Hypothesis states that life on earth controls the physical and chemical conditions of the environment (the biotic controls the abiotic) The hypothesis was formulated by James Lovelock and Lynn Margulis The hypothesis points to stable conditions, such as oxygen levels and climate, as evidence that living organisms maintain a life-sustaining environment The hypothesis has been defined and argued in numerous ways, and has as many critics as adherents.

The Gaia hypotheses: Are they testable?

Alternatives to the Gaia Hypothesis Oxygen: was first produced more than 3 billion years ago.

James Lovelock and the Gaia hypothesis | New Scientist

In 1912 a German meteorologist named Alfred Wegener (1880-1931) hypothesized a single proto-supercontinent that divided up into the continents we now know because of continental drift and plate tectonics. This hypothesis is called Pangaea because the Greek word "pan" means "all" and Gaea or Gaia (or Ge) was the Greek name of the divine personification of the Earth. Discover the science behind how Pangaea broke apart millions of years ago.

Gaia Hypothesis - UCD Energy Research Group

Gaia hypothesis: the original version — the Earth’s organisms regulate the physical and chemical components of the earth system so as to maintain the planet as an optimal habitat for life.

The essential idea of the Gaia Hypothesis is analogous to the thermostat in your home, or the thermostat in your brain.

<Diogenes> Would you care to talk about the gaia hypthesis


The Gaia hypothesis sees life regulating the surface temperatureof Earth. The average surface temperature of Earth has remained withina narrow range - between 10 and 20 C - for over three billion years. During that time the sun's output has increased by thirty or forty percent. Even ignoring the long-term trend of the sun, the temperature would varyfar more, as it does for example every day on the surface of Mars

organism as the Gaia hypothesis predicts

Gladly we accepted his suggestion and Gaia is also the name of the hypothesis of science which postulates that the climate and the composition of the Earth always are close to an optimum for whatever life inhabits it.

Gaia Theory | Model and Metaphor for the 21st Century

then the steady state will be whichever side of the optimum leads to negative feedbacks, thus enhancing the stability of the physical system. The “optimal for life” in the original Gaia hypothesis is replaced by “mutually enhanced stability of the physical and biological systems”.

Gaia Theory | Gaia Hypothesis | System

Two models emerge: The model that life influences planetary processes (i.e., it has a substantial effect on abiotic processes) has become known as the weak Gaia hypothesis. This model is widely supported.

uw essay prompts gaia hypthesis 8th December, 2017

"The notion of the biosphere as an active adaptive control system able to maintain the earth in homeostasis we are calling the 'Gaia' hypothesis" (Lovelock and Margulis, 1974).

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Specifically, the Gaia hypothesis says that the temperature,oxidation,state, acidity, and certain aspects of the rocks and waters are kept constant,and that this homeostasis is maintained by active feedback processes operatedautomatically and unconsciously by the biota."Even the shifting of the tectonic plates, resulting in the changing shapes of thecontinents, may result from the massive limestone deposits left in the earth bybioforms eons ago."You may find it hard to swallow the notion that anything as large and apparentlyinanimate as the Earth is alive.