Resumen

PATINO FLORES, A.M. et al. Effect of coverage and edaphic conditions on the presence of Amoreuxia wrightii A. Gray, in northeastern Mexico. Polibotánica [online]. 2022, n.54, pp.87-99.  Epub 12-Sep-2022. ISSN 1405-2768.  https://doi.org/10.18387/polibotanica.54.6.

Amoreuxia wrightii is a herbaceous species for medicinal use, which has been cataloged in NOM-059-SEMARNAT-2010 as in danger of extinction. The objective of this study was to determine the effect of crown cover, as well as edaphic conditions where Amoreuxia wrightii develops. For this, two areas were evaluated, one with disturbance and the other without apparent disturbance, with eight sites of 10 m x 10 m in each area. The importance value index of the plant species present, their diversity, as well as the density of individuals, basal area, timber volume and crown area were determined; On the other hand, the physical and chemical characteristics of the soil were evaluated through a canonical correspondence analysis. The results indicate similarity for the disturbed and non-disturbed sites in the variables of density, basal area and timber volume; and statistically significant differences for the canopy area variables, being higher in the area without disturbance. For the disturbed area, diversity was low while for the undisturbed area it was medium. Shannon diversity was greatest in the undisturbed area. The canonical correspondence analysis showed that Amoreuxia wrightii is associated with shrubby species such as Croton cortesianus, Vachellia farnesiana and Vachellia rigidula, in addition to preferring clay soils with high bulk density values. Amoreuxia wrightii is found only in disturbed areas where cover is minimal.

Palabras llave : canonical correspondence analysis; cover; bulk density; disturbance; danger of extinction; clay soil.

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