About the Heinz Center

Established in December 1995 in honor of Senator John Heinz, The H. John Heinz III Center for Science, Economics and the Environment is a nonprofit, nonpartisan institution dedicated to improving the scientific and economic foundation for environmental policy through multisectoral collaboration. Focusing on issues that are likely to confront policymakers within two to five years, the Center fosters collaboration among industry, environmental organizations, academia, and government in each of its program areas and projects. It uses the best scientific and economic analyses to develop viable options to solving problems, and its findings and recommendations are widely disseminated to public and private sector decision makers, the scientific community, and the public.

PUBLISHED BY THE PRESS SYNDICATE OF THE UNIVERSITY OF CAMBRIDGE
The Pitt Building, Trumpington Street, Cambridge, United Kingdom

CAMBRIDGE UNIVERSITY PRESS
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Ruiz de Alarcón 13, 28014 Madrid, Spain
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Copyright © 2002 by The H. John Heinz III Center for Science, Economics and the Environment. All rights reserved.

First published 2002

Printed in the United States of America

A catalog record for this book is available from the British Library.

Library of Congress Cataloging-in-Publication Data
The state of the nation’s ecosystems : measuring the lands, waters, and
living resources of the United States / The H. John Heinz III
Center for Science, Economics, and the Environment
 p. cm.
Includes bibliographical references.
 ISBN 0-521-52572-1 (pb.)
1. Environmental monitoring—United States—Methodology. 2. Ecosystem
health—United States. I. H. John Heinz III Center for Science,
Economics and the Environment.
QH104  .S73  2002
333.7'2—dc21  2002073890

Designed by Janin/Cliff Design, Inc., Washington, D.C.
Printed on recycled paper

The State of the Nation’s Ecosystems is also available on line at www.heinzctr.org/ecosystems.

Adapted for World Wide Web publication by Information International Associates, Inc., Oak Ridge, TN.
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The H. John Heinz III Center for Science, Economics and the Environment
1001 Pennsylvania Avenue, NW, Suite 735 South
Washington, DC 20004
Tel: (202) 737-6307 Fax: (202) 737-6410 e-mail: info@heinzctr.org