"The First Edition of Ecology and Classification of North American Freshwater Invertebrates" has been immensely popular with students and researchers interested in freshwater biology and ecology, limnology, environmental science, invertebrate zoology, and related fields. The First Edition has been widely used as a textbook and this Second Edition should continue to serve students in advanced classes. The Second Edition features expanded and updated chapters, especially with respect to the cited references and the classification of North American freshwater invertebrates. New chapters or substantially revised chapters include those on freshwater ecosystems, snails, aquatic spiders, aquatic insects, and crustaceans. It is the most up-to-date and informative text of its kind. Written by experts in the ecology of various invertebrate groups, the coverage emphasizes ecological information within a current taxonomic framework. Each chapter contains both morphological and taxonomic information, including keys to North American taxa (usually to the generic level) as well as bibliographic information and a list of further readings. The text is geared toward researchers and advanced undergraduate and graduate students.