The function of the energy subsystem is to power the ecosystem. The function of the material subsystem is to provide the necessary organic and inorganic building blocks required for both the living (biotic) and non-living (abiotic) components of the ecosystem. Together the two subsystems provide for the continuing functioning of the ecosystem. If either subsystem is interrupted , degraded or altered (e.g by pollution, or an increase in energy input, such as global warming) then the functioning of the ecosystem is likely to be altered. In turn this will affect the efficiency with which the ecosystem can perform its functions within the global environment as a whole.
Ecosystems
Gordon Dickinson, Kevin J.Murphy Pg 27
Using energy from sunlight, the photosynthetic autotrophic organism converts CO2, water and minerals into all the constituents of the organism..........The autotrophs are also responsible for providing the heterotrophs with organic nourishment.
The biology problem solver
Max Fogiel Pg 130
The biosynthesis of organic carbon starting from inorganic carbon species by autotrophic organisms is a prerequisite to sustain life.
Desk Encyclopedia of Microbiology
Moselio Schaechter pg 140
The heartbeat of the entire system is a consumption culture that trains citizens to be avid consumers of goods and services by promising prestige, happiness, admiration, success and satisfaction.
Earth Capitalism: Creating a New Civilization through a responsible Market
Partrick U.Petit, Bill Gates Pg 41
Wealth is evidently not the good we are seeking; for it is merely useful and for the sake of something else.
Aristotle
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