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Earth
What is Gaia?
Gaia: Evidence for Homeostasis
From "Biological Modulation of the Earth's Atmosphere"
Margulis and Lovelock, 1973
- compiled of cybernetic systems
- has the ability to control atmospheric
gas concentration
Origin
The Earth is Consistent
Theory
Greek Origin
Early after life began...
1. Patterns of crustal alterations and soil formation
have stayed constant through time
aquired control over planetary environment
References...
the maintenence of homeostasis by and for
the atmosphere has persisted ever since
all systems on earth are connected:
plant, animal and human
2. Ocean basins, lake and stream morphology
- have not changed much in 3 billion years
Lynn Margulis: Science’s Unruly Earth Mother.
Research News vol 252, 19 April 1991, pp 378-381
3. Temperature changes have occured, but not too extreme
Lovelock, J.E. and Margulis, Lynn.
Biological
6 Nov 1973
Modulation of the Earth’s Atmosphere,
Lovelock, James. "What Is Gaia?" James Lovelock. Ecolo.org. Web. 15 Nov. 2011. <http://www.ecolo.org/lovelock/what_is_Gaia.html>.
Control of Acidity and Redox
Conclusion
How Life Changes the Atmosphere..
Microbial Contribution
If the Earth had no life...
- Earth has maintained a relatively
constant atmospheric pH
Lovelock on "What is Gaia states “we now see that the air, the ocean and the soil are much more than a mere environment for life; they are part of life itself.”
The End
1. Nitrogen Fixation
- Oxidation/ Reduction potential controlled
mainly by biota
- since about 3 billion
years ago
If the Gaia hypothesis is proven to be true?
2. Carbon Fixation
Adds
Algae, blue-green algae
- methane
- ammonia
- diatomic nitrogen
- diatomic oxygen, ect.
3. Oxygen Secretion
- All components of the environment are interconnected and maintain homeostasis for life on Earth.
- New hypothesis concerning the improvement of global sustainability can be formulated regarding our Planets limiting resources for agriculture, water and topsoil.
Controlling Temperature
Three Stages of Atmosphere
Radiation Balance
- incoming solar
- Emissivity
- Albedo
1. Anaerobic conditions
2. Transition from reducing to oxidizing conditions
Ozone
3. Conditions oxidized and stable for abundant life