Biology 2483A Lecture Notes - Photic Zone, Northern Hemisphere, Chemosynthesis
5 Dec 2013
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Document Summary
Lindeman studied energy relationships among the organisms and non living components in a lake ecosystem. Rather than grouping its plants, animals, and bacteria according to their taxonomic categories, they were grouped based on how they obtain their energy. The term ecosystem was first used by tansley (1935) to refer to all the components of an ecological system, biotic and abiotic, that influence the flow of energy and elements. The elements are primarily nutrients, but may also include pollutants. The ecosystem concept integrates ecology with other disciplines such as geochemistry, hydrology, and atmospheric science. Primary production is the chemical energy generated by autotrophs during photosynthesis and chemosynthesis. (chemosynthesis generates a very small amount of energy) Primary production represents an important energy transition (conversion of light energy from the sun into chemical energy that can be used by autotrophs and consumed by heterotrophs) Primary productivity is the rate of primary production.
