How do microbe decomposers affect concentrations of dissolved oxygen in polluted water?

Abstract

It was observed that polluted waters have an effect on dissolved oxygen. We set out to determine the key components of this phenomenon. We believed that the root cause of this effect is the decomposers that metabolize the dissolved oxygen during cellular respiration. We added three different concentrations of decomposers to separate samples of polluted water and then measured the amount of dissolved oxygen. Our research indicates that the growth of decomposers directly affects the amount of dissolved oxygen in water. The reduction of dissolved oxygen, as a result of the rapid growth of decomposers, can have a negative impact on organisms in the ecosystem.