Lake Erie is the southernmost and shallowest of the Great Lakes. The other Lakes are all in excess of 750 feet deep while Lake Erie is approx. 210 feet deep at its deepest point in the Eastern Basin off Long Point. As a result, Lake Erie is the warmest of the Great Lakes.
The watersheds around the other four Great Lakes have extensive forest ecosystems. The watersheds around Lake Erie is dominated by an agricultural and urban system, so we receive more sediment and more nutrients (agricultural and sewage) than the other four Great Lakes.
As a result of being the shallowest, warmest and receiving the most nutrients, Lake Erie is able to annually produce more fish for human comsumption than the other four Great Lakes combined. 8)
