Yes, Lake Erie is considered a dead zone. The central basin at the bottom of the lake has little to no oxygen because it gets used up by bacteria in their decomposition processes. Heavy influxes of nutrients such as phosphorus and nitrogen from man-made sources cause algal blooms, which also use up the lake’s dissolved oxygen supply. Exotic or invasive species like zebra mussels have also impacted the lake’s nutrient cycling process, and thus impacts the oxygen levels as well.
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