Multivariate characterization of perennial vegetation in the northern Chihuahuan Desert

TitleMultivariate characterization of perennial vegetation in the northern Chihuahuan Desert
Publication TypeJournal Article
Year of Publication2000
AuthorsJohnson A.R., Turner S.J., Whitford WG, de Soyza A.G., Van Zee JW
JournalJournal of Arid Environments
Volume44
Pagination305-325
Date PublishedMarch 1, 2000
ARIS Log Number150381
KeywordsChihuahuan Desert, Larrea tridentata, perennial vegetation, prosopis glandulosa
Abstract

We surveyed vegetation at 100 sites in southern New Mexico to establish a benchmark for monitoring vegetation change. Sites were selected in a stratified random design based on a classified AVHRR image. Two shrubs (Larrea tridentata and Prosopis glandulosa) are the most important contributors to perennial cover in the area. Principal components analysis (PCA) and detrended correspondence analysis (DCA) both clearly delineate these shrublands from the smaller number of compositionally varied grassland sites. A latitudinal trend in DCA axis 1 scores suggests that encroachment of shrubs into grasslands is most pronounced in the southern portion of the study area.

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DOI10.1006/jare.1999.0597