NDLI: Cactus species turnover and diversity along a latitudinal transect in the Chihuahuan Desert Region

Content Provider	Springer Nature Link
Author	Hernández, Héctor M. Goettsch, Bárbara Gómez Histrosa, Carlos Arita, Héctor T.
Copyright Year	2007
Abstract	A standardized sampling method was used to evaluate turnover (β diversity) among cactus species assemblages along a 798 km long latitudinal megatransect across the Chihuahuan Desert Region, from north-central Mexico to southern Texas. A total of 71 cactus species were found along the megatransect, 66.2% of which appeared at low frequencies, mostly as a consequence of their highly discontinuous distribution pattern. At the scale the study was conducted, there was always species turnover among cactus assemblages. The rate of turnover among contiguous sites primarily fluctuated from low to medium, but when all site combinations were considered (contiguous and non-contiguous), medium β diversity values were predominant (β = 0.331–0.66); however, 25.4% of the site pair combinations registered high values (β = 0.661–1.0). Our results showed that turnover among cactus species assemblages in the CDR does not consist for the most part of a process of species succession in the geographic space. Instead, we concluded that the continuous spatial changes in cactus species composition are primarily explained by the commonly intermittent distribution patterns of the species, by the presence in the megatransect of species at the margin of their distribution range, and, to a lesser extent, by the existence of narrowly endemic species.
Starting Page	703
Ending Page	720
Page Count	18
File Format	PDF
ISSN	09603115
Journal	Biodiversity and Conservation
Volume Number	17
Issue Number	4
e-ISSN	15729710
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-12-19
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Beta diversity Cactaceae Chihuahuan Desert Mexico Texas Tree Biology Plant Sciences Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics Nature and Landscape Conservation

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