ap_labs_2 - Geoffrey Vedernikoff September 4, 2010 AP...

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Geoffrey Vedernikoff September 4, 2010 AP Biology Lab 12: Dissolved Oxygen The only way for aquatic life to breathe is for oxygen to be dissolved. There are many factors that affect the amount of oxygen dissolved in water: temperature, photosynthetic activity, decomposition activity,mixing and turbulence, and salinity. As water becomes warmer, its ability to hold oxygen decreases. In bright sunlight, aquatic plants are able to produce more oxygen. As organic material decays, microbial processes consume oxygen. Wave action, waterfalls, and rapids all aerate water and increase the oxygen concentration. As water becomes more salty, its ability to hold oxygen decreases. Primary production is the rate at which plants produce organic compounds in an ecosystem. Gross productivity is the entire photosynthetic production of organic compounds in an ecosystem. Net productivity is the organic materials that remain after photosynthetic organisms in the ecosystem have used some of these compounds for their
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This note was uploaded on 09/15/2010 for the course GOV 432 taught by Professor Dr.cardenas during the Spring '10 term at 카이스트, 한국과학기술원.

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