A large number of fish are suddenly found floating dead on a lake. There is no evidence of toxic dumping but you find an abundance of phytoplankton. Suggest a reason for the fish kill

A large number of fish are suddenly found floating dead on a lake. The

1.	A large number of fish are suddenly found floating dead on a lake. There is no evidence of toxic dumping but you find an abundance of phytoplankton. Suggest a reason for the fish kill
Answer» <html><body><p></p>Solution :Excessive phytoplankton (organic pollutants such as leaves, grass, trash, etc.) present in water is biodegradable. large population of bacteria decomposes this organic matter in water. During this process, they consume the oxygen <a href="https://interviewquestions.tuteehub.com/tag/dissolved-956358" style="font-weight:bold;" target="_blank" title="Click to know more about DISSOLVED">DISSOLVED</a> in water. Water has already limited dissolved oxygen (10 ppm). Thus, it is further depleted When the <a href="https://interviewquestions.tuteehub.com/tag/level-1072714" style="font-weight:bold;" target="_blank" title="Click to know more about LEVEL">LEVEL</a> of dissolved oxygen falls below 6 ppm the fish cannot survive <a href="https://interviewquestions.tuteehub.com/tag/hence-484344" style="font-weight:bold;" target="_blank" title="Click to know more about HENCE">HENCE</a>, they die and lot <a href="https://interviewquestions.tuteehub.com/tag/dead-435383" style="font-weight:bold;" target="_blank" title="Click to know more about DEAD">DEAD</a> on the lake</body></html>