When the ice comes off the lake in the spring , sometimes people will encounter a fish kill. That’s when 25 or more fish are found dead after perishing during the winter months. Many reasons can lead to fish kills, but the number one reason is environmental issues caused by humans.
Fish Kills Happen Each Spring In Minnesota
Some fish kills are caused by nature. During the winter months, ice and snow covering the lake reduce sunlight, which can kill vegetation in the lake . Oxygen levels can get so low in the water that the fish die off.
Low water levels can also cause fish kills during the winter months. Diseases, stranded fish, and higher water temperature levels are also causes.
Human environmental issues come from pollution, or even sewage getting into the lake. Runoff chemicals from agriculture can also pollute lakes and streams…