Lynch, Emma. River food chains / by Emma Lynch. - Oxford : Heinemann Library, 2005. - 32 p. : ill., photo., col ; 25 cm. - Food Chains and Webs. Heinemann Infosearch. . - Food Chains and Webs. Heinemann Infosearch. . Includes glossary. Includes index. ISBN: 0431119007 Subjects--Topical Terms: Ecology.Food chains (Ecology)--Juvenile literature.Stream ecology--Juvenile literature. Dewey Class. No.: 577.6