GEO 101 Chapter Notes - Chapter 22: Nutrient Cycle, Pyrolysis, Nitrogen Cycle
13 Nov 2017
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Energy and matter flow in ecosystems: how energy flows through an ecosystem (a group of organisms and the environment with which they interact) Net photosynthesis: rate of net photosynthesis in strongly dependent on the intensity of light energy available, up to a limit, above the maximum, rate falls down because excessive light causes heating which increases the rate of respiration. Net production and precipitation: net production increases rapidly with increasing precipitation but levels off at higher values. Include nitrogen cycle, oxygen cycle, sedimentary cycle and hydrological cycle. In a symbiotic relationship of nitrogen fixers, two species of organisms live in close physical contact and contribute to the life processes or structures of the other. Nutrient elements in the biosphere: three principle components of carbohydrate: hydrogen, carbon and oxygen, account for 99. 5% of all living matter, called macronutrients, macronutrients: elements required in substantial quantities for organic life to thrive.
