Paul Fleisher 
Lake and Pond Food Webs in Action [PDF ebook] 

Frogs, minnows, snails, ducks, catfish, and muskrats are a few of the animals that make up a lake and pond food web. But do you know why mosquitoes, mold, water lilies, and bacteria are important too? Or how humans can change the health of a lake or a pond? See lake and pond food webs in action in this fascinating book.