Gaia's Body: Toward a Physiology of Earth
Gaia, the largest entity in the nested system of life on Earth, is surely not an organism, but it nevertheless shows a kind of physiology with fascinating internal dynamics. This statement implies physiologic functions, chemical cycles, even feedback loops that have some role in long-term stability. What are these functions, how do we know they exist, and how do we learn about them? This is the subject that Tyler Volk tackles brilliantly in Gaia's Body. A seamless, engagingly readable introduction to the budding new field of Earth physiology, Gaia's Body blends real science with evocative imagery in describing the system of life, soil, ocean, and air we have termed the biosphere. Volk shows how every important chemical in the atmosphere is regulated by living processes; why strange, spaghetti-like bacteria off the coast of Chile have an intimate connection with the plants in your backyard; why "biochemical guilds" may be Earth's most important unit of life; and even how scientists have detected the "breathing" of the biosphere. He examines long-term trends in Earth's evolution (is Gaia growing colder? more complex?) and examines humanity's role in Gaia's past and future.
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Breathing of the Biosphere
A Global Holarchy
Outer Light Inner Fire
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absorbed acids algae ammonium amount archaea atmosphere atoms bacteria biochemical guilds biological biomass biomes biosphere biota biotic enhancement bodies border breath burial calcium Calvin cycle carbon cycle carbon dioxide cells chemical chemistry chlorophyll chlorophyll molecules climate clouds complex crucial cyanobacteria deep denitrifiers detritus dissolved ions dynamics ecosystems effect elements embodied energy enter enzymes evolution evolved example factor flow flux fungi Gaia Gaia's gaian gaian matrixes gaian system gases geophysiology global green heat Helios holarchy hydrogen sulfide infrared iron land latitudes life's living marine Mauna Loa metabolism microbes million tons minerals molecular molecules nitrate nitrogen fixers nutrients ocean organisms oxide oxygen particles pathway percent phosphorus photons photosynthesis plankton plants pool proteins reaction center recycled respiration rivers rock roots Rubisco scales sediments soil soil's solar species sphere square meter sulfate sulfur surface temperature terrestrial Thioploca today's Vulcan waste watts per square zone