A description of the producers and consumers you do not

Question

Consider the food web for Lake Erie shown above.

Give a detailed analysis of this food web. Be sure to address the following in your analysis: 

1. A description of the producers and consumers (you do not need to list every organism, but give a few examples along with what makes an organism fall into one class or the other)
2. Energy movement through the food web
3. The number of trophic levels found in this food web
4. Which organisms most efficiently utilize the resources
5. The way in which of one biogeochemical cycles interacts with the ecosystem of this food web
6. How humans can negatively impact this food web