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dc.contributor.authorGoslee, S. C.
dc.contributor.authorBeck, K. G.
dc.contributor.authorPeters, D. P. C.
dc.date.accessioned2020-09-18T04:00:11Z
dc.date.available2020-09-18T04:00:11Z
dc.date.issued2003-05-01
dc.identifier.citationGoslee, S. C., Beck, K. G., & Peters, D. P. C. (2003). Distribution of Russian knapweed in Colorado: Climate and environmental factors. Journal of Range Management, 56(3), 206-212.
dc.identifier.issn0022-409X
dc.identifier.doi10.2307/4003808
dc.identifier.doi10.2458/azu_jrm_v56i3_goslee
dc.identifier.urihttp://hdl.handle.net/10150/643428
dc.description.abstractRussian knapweed (Acroptilon repens (L.) DC.) was introduced to the western United States during the early 1900s. This invasive perennial was a contaminant of alfalfa seed, and was distributed widely across Colorado. Thus, current distributions reflect the climate and soils tolerances of Russian knapweed, and management history, rather than dispersal processes. We surveyed extension and weed agents across Colorado, and were able to locate 528 current or recently eliminated Russian knapweed stands. These patches were superimposed on climate and soils maps to identify 1 km grid cells that were known to contain Russian knapweed. The status of Russian knapweed within a cell was used as the dependent variable in a logistic regression model to define the environmental envelope for this species. At the scale of our analysis, Russian knapweed was most prevalent on fine-textured soils (clay and clay loam), and in warmer, drier regions of Colorado (precipitation 18-73 cm/yr, mean annual temperature 1-12 degrees C). June precipitation was the most important single factor, although nearly all environmental, annual, and monthly climatic factors were significantly related to Russian knapweed occurrence. The multivariate logistic regression model we developed was used to predict the probability of occurrence of Russian knapweed for the entire state of Colorado. Our predictions matched the areas of highest abundance of Russian knapweed from a new field survey, and also indicated areas of high risk that were not identified by the field survey.
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.subjectclay loam soils
dc.subjectweed biology
dc.subjectAcroptilon repens
dc.subjectmathematical models
dc.subjectprediction
dc.subjectambient temperature
dc.subjectclay soils
dc.subjectenvironmental factors
dc.subjectprecipitation
dc.subjectinvasive species
dc.subjectColorado
dc.subjectaltitude
dc.subjectgeneralized additive model
dc.subjectgeographic information systems
dc.subjectlogistic regression
dc.titleDistribution of Russian knapweed in Colorado: climate and environmental factors
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.issue3
dc.source.beginpage206-212
refterms.dateFOA2020-09-18T04:00:11Z


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