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- W2172896077 abstract "This study deals with the habitat restriction of Mammillaria pectinifera, a threatened cactus species, con- fined to a few low density localities of the Tehuacan valley in tropical Mexico. We analysed the patterns of presence/ab- sence of M. pectinifera in relation to the presence/absence of 48 other plant species, and the variation of environmental factors in 120 sampling plots. A Principal Components Analy- sis revealed a clear segregation between plots with and with- out individuals of M. pectinifera. A classification analysis resulted in four groups: two with low prevalence and two with high prevalence of M. pectinifera. Paired comparisons be- tween plots with and without M. pectinifera allowed the characterization of its patterns of occurrence related to the variation of environmental factors. M. pectinifera was found on deep alkaline soils with relatively high surface stoniness and high water retention capacity, showing low species rich- ness compared with plots where it was absent. The limited distribution of M. pectinifera in the Tehuacan Valley seems to be related to particular requirements of this species, being restricted to certain suitable habitat patches. Nevertheless, it is likely that other aspects, such as poor dispersal and establish- ment abilities, or biotic interactions could be associated with the observed patterns." @default.
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- W2172896077 date "2003-01-01" @default.
- W2172896077 modified "2023-09-25" @default.
- W2172896077 title "Habitat restriction in Mammillaria pectinifera, a threatened endemic Mexican cactus" @default.
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- W2172896077 doi "https://doi.org/10.1658/1100-9233(2003)014[0891:hrimpa]2.0.co;2" @default.
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