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dc.contributor.authorBestelmeyer, Brandon T.
dc.contributor.authorBrown, Joel R.
dc.contributor.authorHavstad, Kris M.
dc.contributor.authorAlexander, Robert
dc.contributor.authorChavez, George
dc.contributor.authorHerrick, Jeffrey E.
dc.date.accessioned2020-09-18T05:07:24Z
dc.date.available2020-09-18T05:07:24Z
dc.date.issued2003-03-01
dc.identifier.citationBestelmeyer, B. T., Brown, J. R., Havstad, K. M., Alexander, R., Chavez, G., & Herrick, J. E. (2003). Development and use of state-and-transition models for rangelands. Journal of Range Management, 56(2), 114-126.
dc.identifier.issn0022-409X
dc.identifier.doi10.2307/4003894
dc.identifier.doi10.2458/azu_jrm_v56i2_bestelmeyer
dc.identifier.urihttp://hdl.handle.net/10150/643726
dc.description.abstractState-and-transition models have received a great deal of attention since the introduction of the concept to range management in 1989. Nonetheless, only recently have sets of state-and-transition models been produced that can be used by agency personnel and private citizens, and there is little guidance available for developing and interpreting models. Based upon our experiences developing models for the state of New Mexico, we address the following questions: 1) how is information assembled to create site-specific models for entire regions, 2) what ecological issues should be considered in model development and classification, and 3) how should models be used? We review the general structure of state-and-transition models, emphasizing the distinction between changes among communities within states (pathways) that are reversible with changes in climate and “facilitating practices” (e.g. grazing management), and changes among states (transitions) that are reversible only with “accelerating practices” such as seeding, shrub control, or the recovery of soil stability and historical hydrologic function. Both pathways and transitions occur, so these models are complementary. Ecological sites and the climatically-defined regions within which they occur (land resource units) serve as a framework for developing and selecting models. We illustrate the importance of clearly delineating ecological sites to produce models and describe how we have dealt with poorly-delineated sites. Producing specific models requies an understanding of the multiple ecological mechanisms underlying transitions. We show how models can represent and distinguish alternative and complementary hypotheses for transitions. Although there may be several mechanisms underlying transitions, they tend to fall within discrete categories based upon a few, fundamental ecological processes and their relationships can be readily understood. A knowledge of mechanisms is closely related to the use of ecological indicators to anticipate transitions. We conclude that models should include 1) reference values for quantitative indicators, 2) lists of key indicators and descriptions of changes in them that suggests an approach to a transition, and 3) a rigorous documentation of the theory and assumptios (and their alternatives) underlying the structure of each model.
dc.language.isoen
dc.publisherSociety for Range Management
dc.relation.urlhttps://rangelands.org/
dc.rightsCopyright © Society for Range Management.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectcommunity stability
dc.subjectecological sites
dc.subjectecosystem health
dc.subjectindicators
dc.subjectNew Mexico
dc.subjectvegetation dynamics
dc.titleDevelopment and use of state-and-transition models for rangelands
dc.typetext
dc.typeArticle
dc.identifier.journalJournal of Range Management
dc.description.collectioninformationThe Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform August 2020
dc.source.volume56
dc.source.issue2
dc.source.beginpage114-126
refterms.dateFOA2020-09-18T05:07:24Z


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