Daniel, Claire.

Ecosystems / written by Claire Daniel. - Austin, TX : Steck-Vaughn, c2003. - 48 p. : col. ill., col. maps ; 21 cm. - Pair-it books .

"Proficiency stage 6"-- Cover p.4. Includes index.

ISBN: 0739861727 (pbk.)

Subjects--Topical Terms:
Ecology.
Biotic communities.