Top: Kids and Teens: School Time: Science: The Earth: Biomes: Ponds (2)
http://www.simiax.com//Kids_and_Teens/School_Time/Science/The_Earth/Biomes/Ponds/index.htm

Ecology: The Pond Ecosystem - An overview of the greenhouse effect, adaptations, the food chain, and other related topics. Written by students at St. Joseph High School.

Lakes and Ponds Habitat Guide - Information and color photographs of hundreds of species that inhabit lakes and ponds in the North America.