biotic communities

Text and photographs introduce young readers to ecosystems in a variety of habitats.

Contains six simple science experiments with easy-to-follow instructions designed to teach children about ecosystems.

Describes ecosystems and the problems they face and discusses links between ecosystems and the environment, society, careers, and technology. Also includes "challenge" activities.

Explains the rules by which ecosystems thrive, shining light on a set of ecological balancing acts called "green equilibria," rules which keep our world vibrant, verdant, and ecologically intact.

Discusses the sharing of food and other resources among species of animals that live in the same community.

Examines how natural cycles and specific ecosystems work and suggests activities to learn about protecting the earth from further damage by pollution and waste.

The removal of a family of wolves from a small island causes a disruption in the food chain that has a devastating effect on all the other animals on the island.

Photographs and text describe the animals and ecology of the Arctic.

Describes how the diversity of life on Earth is being destroyed now by human activities at a rate ten to one-hundred times faster than in the planet's history. Discusses the importance of preserving ecosystems, restoring habitats, and stopping global warming.