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The idea for this book arose during the planning phases of an International Conference in Edmonton, Canada in July 2004 entitled “The Science of Changing Climates — Impacts on Agriculture, Forestry and Wetlands.” The conference was organized jointly by the Canadian Societies of Animal Science, Plant Science and Soil Science with support from Natural Resources Canada/Canadian Forest Service because they saw climate change as one of the most serious environmental problems facing the world | Climate Change and Managed Ecosystems 2006 by Taylor Francis Group LLC Climate Change and Managed Ecosystems Edited by J.S. Bhatti R. Lal M.J. Apps M.A. Price A CRC title part of the Taylor Francis imprint a member of the Taylor Francis Group the academic division of T F Informa pic. 2006 by Taylor Francis Group LLC Published in 2006 by CRC Press Taylor Francis Group 6000 Broken Sound Parkway NW Suite 300 Boca Raton FL 33487-2742 2006 by Taylor Francis Group LLC CRC Press is an imprint of Taylor Francis Group No claim to original U.S. Government works Printed in the United States of America on acid-free paper 10 987654321 International Standard Book Number-10 0-8493-3097-1 Hardcover International Standard Book Number-13 978-0-8493-3097-1 Hardcover Library of Congress Card Number 2005028910 This book contains information obtained from authentic and highly regarded sources. Reprinted material is quoted with permission and sources are indicated. A wide variety of references are listed. Reasonable efforts have been made to publish reliable data and information but the author and the publisher cannot assume responsibility for the validity of all materials or for the consequences of their use. No part of this book may be reprinted reproduced transmitted or utilized in any form by any electronic mechanical or other means now known or hereafter invented including photocopying microfilming and recording or in any information storage or retrieval system without written permission from the publishers. For permission to photocopy or use material electronically from this work please access www.copyright.com http www.copyright.com or contact the Copyright Clearance Center Inc. CCC 222 Rosewood Drive Danvers MA 01923 978-750-8400. CCC is a not-for-profit organization that provides licenses and registration for a variety of users. For organizations that have been granted a photocopy license by the CCC a separate system of payment has been arranged. Trademark Notice Product or .