Lab 12

Lab 12 - J. Michael Lindle 5/18/10 Mr. Odolecki Lab 12...

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J. Michael Lindle 5/18/10 Mr. Odolecki Lab 12 Intro: A different method of measuring dissolved oxygen in water is by using a dis- solved oxygen probe and meter; otherwise known as a lambda sensor. However, this method is less effective than Winkler’s method, which we performed in class. It is re- commended that all data gained from the probe and meter should be compared with Winkler’s method. Dissolved oxygen levels in an environment can determine how easily other or- ganisms can live and thrive in the environment; its viability. If the environment contains too much oxygen, the organisms can contract and suffer from decompression sickness. The ideal amount of dissolved oxygen will allow the area to flourish and thrive. The bio- mass in a particular area can be found by measuring the amount of oxygen produced through photosynthesis and the amount of oxygen consumer in cellular respiration. Biological Oxygen Demand is a chemical procedure to find the absorption rate of dissolved oxygen by the aquatic organisms. This usually measures the amount of aer- obic bacteria present that break down organic waste in the water. When the BOD is high, less oxygen is present, which increases the aquatic life form’s chances of death. A high BOD also indicates that there is a high amount of organic waste in the water. Typic-
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This note was uploaded on 01/25/2012 for the course BIO 1111 taught by Professor Odolecki during the Fall '10 term at GWU.

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Lab 12 - J. Michael Lindle 5/18/10 Mr. Odolecki Lab 12...

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