Densities, plant sizes, and spatial distributions of six wild populations of Lophophora williamsii (Cactaceae) in Texas, U.S.A.

Autores/as

  • Anna Ermakova Imperial College London, Silwood Park
  • Carolyn V. Whiting University of Texas at Austin, Department of Integrative Biology
  • Keeper Trout Cactus Conservation Institute
  • Colin Clubbe Royal Botanic Gardens Kew
  • Martin K. Terry Cactus Conservation Institute
  • Norma Fowler University of Texas at Austin, Department of Integrative Biology

DOI:

https://doi.org/10.17348/jbrit.v15.i1.1057

Palabras clave:

cactus, Chihuahuan Desert, clustered distribution, conservation, density, endangered, population, size distribution, Tamaulipan thornscrub, threatened

Resumen

Lophophora williamsii (Cactaceae) se considera amenazada por la pérdida de hábitat y colecta excesiva. Sin embargo, se carece de información demográfica y ambiental básica para evaluar su estado de conservación. Para abordar este déficit, examinamos seis poblaciones silvestres de esta especie (tres en el sur y tres en el oeste de Texas respectivamente). Encontramos altos niveles de heterogeneidad en la presencia y densidad de plantas en múltiples escalas espaciales. Las densidades no son consistentemente diferentes entre el sur y el oeste, pero las plantas son significativamente más grandes en el oeste. Las dos regiones difieren notablemente en precipitación, temperatura, elevación y topografía. Todas estas variables están correlacionadas a escala regional, por lo que no es posible identificar cuál de ellas (u otros factores como la competencia y la colecta humana) causan las diferencias regionales observadas en el tamaño de la planta. Nuestros resultados proporcionan información fundamental para determinar el estado de conservación de esta especie.

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Publicado

2021-07-23

Cómo citar

Ermakova , A. ., Whiting, C. V., Trout, K. ., Clubbe, C. ., Terry, M. K., & Fowler, N. . (2021). Densities, plant sizes, and spatial distributions of six wild populations of Lophophora williamsii (Cactaceae) in Texas, U.S.A. Journal of the Botanical Research Institute of Texas, 15(1), 149–160. https://doi.org/10.17348/jbrit.v15.i1.1057

Número

Sección

FLORÍSTICA, ECOLOGÍA Y CONSERVACIÓN