biotic communities

Discusses evolution and other theories about the origin of life and describes plants and animals of various geographical regions.

Informative text, photographs, illustrations, and science activities and projects examine biomes, including deserts, the tundra, freshwater regions and more and discusses related topics, such as adaptation and the Tollund Man.

Presents a short study of the various types of wetlands including bogs, fens, marshes, and swamps, where they are located, plants and wildlife, endangered animals, and efforts to protect it.

Presents a short study of the various types of Tunda including the Arctic Tundra and Alpine Tundra, where they are located, plants and wildlife, technology of the Tundra, and efforts to protect it.

Presents a short study of the various types of grasslands including edaphic grasslands, climatic grasslands, and derived grasslands, where they are located, endangered plants and animals, and efforts to protect them.

Explores some of the world's most unusual ecosystems found in caves, the deep sea, hydrothermal vents on the ocean floor, underground aquifers, and rock deep below earth's surface.

Contains entries that provide overviews of four of Earth's major biomes, providing information about the formation, climate, elevation, growing season, plants, animals and endangered species, food webs, human culture, and economy of the coniferous forest, continental margin, deciduous forest, and desert.

Provides a global perspective on the Biodiversity issue while demonstrating the concept which encompasses the many forms of life on earth and their interdependence on one another for survival.

Explores the science of biomes and ecosystems, discussing photosynthesis, food chains, plant and animal relationships, natural cycles, and other related topics. Includes glossary.

Contains two hundred alphabetically arranged entries that provide information about the climate, precipitation, seasons, and dominant plant and animal life found in each of the Earth's twelve major biomes and examines related topics such as environmental issues, habitats, and species.