期刊名称：Science et changements planétaires / Sécheresse
印刷版ISSN：1147-7806
电子版ISSN：1777-5922
出版年度：2006
卷号：17
期号：1
页码：235-241
出版社：John Libbey Eurotext
摘要：Figures See all figures Authors Jeffrey E Herrick , Edmundo Garcia Moya , Walter Willms , Brandon M Bestelmeyer , Peter Sundt , William S Barnes United States Department of Agriculture, Agricultural Research Service, Jornada Experimental Range, MSC 3JER, NMSU, Box 30003, Las Cruces, NM 88003-8003, USA, Programa de Botanica, Instituto de Recursos Naturales, Km 36.5 Carretera México-Texcoco, Montecillo, Texcoco Edo. de México, CP 56230, Mexique, Agriculture and Agri-Food Canada/Agriculture et Agroalimentaire Canada, 5403 - 1 Avenue South, P.O. Box 3000, Lethbridge, Alberta, Canada T1J 4B1, United States Department of Agriculture/Agricultural Research Service, Jornada Experimental Range, MSC 3JER, NMSU, Box 30003, Las Cruces, NM 88003-8003, USA, PO Box 1057, Safford, Arizona 85548, USA, GrassWorks, Inc., 322 Otero Street, Santa Fe, New Mexico 87501, USA Key words: rangelands, data base, arid zone Page(s) : 235-41 Published in: 2006 Canada, the United States and Mexico all have a long history of rangeland monitoring. However none have developed a nationwide database or even a standardized set of protocols. The lack of standardization, inadequately developed relationships between management objectives and monitoring protocols, and an emphasis on data collection rather than analysis and interpretation have limited the value of past monitoring efforts. The future of monitoring is bright in all three countries. New policies reward ranchers who can document positive changes on their land. Non-equilibrium theory developed in Europe, Africa, Australia and North America increases the value of monitoring data. New protocols increasingly focus monitoring on ecological processes.
