What are the types of pollution that cause reduced levels of dissolved oxygen in aquatic ecosystems. And in each case how is the dissolved oxygen affected.
pls help im very stumped
2007-01-09 08:23:58 · 3 answers · asked by Anonymous in Environment
All types of organic pollution - sewage, fertilizer, etc. -can cause reduced oxygen because of microbes that use up O2 for respiration. This is called the biological oxygen demand. The other type of pollution is thermal pollution where water is heated, and the amount of dissolved O2 decreases.
2007-01-09 09:12:02 · answer #1 · answered by formerly_bob 7 · 0⤊ 0⤋
Well this may help,hope so. Go on the inter net and look for barley straw,get some and put in It is a natural anti algae agent that leaves the water sparkling clear with no chemicals.
2007-01-09 08:30:31 · answer #2 · answered by JOHNNIE B 7 · 0⤊ 0⤋
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2016-10-06 21:54:34 · answer #3 · answered by ? 4 · 0⤊ 0⤋