Spatial distribution, size structure and reproduction of Astrophytum ornatum (Cactaceae)
Background and Aims: The family Cactaceae possesses the largest number of species listed as endangered, but biological information as well as ecological studies are needed to assess the conservation status of cacti and apply guidelines to include or exclude species from red lists. Astrophytum ornatu...
| Main Authors: | , , |
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| Formato: | Online |
| Idioma: | spa |
| Publicado: |
Instituto de Ecología, A.C.
2017
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| Acceso en liña: | https://abm.ojs.inecol.mx/index.php/abm/article/view/1230 |
| _version_ | 1799771324476817408 |
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| author | Zepeda, Verónica Golubov, Jordan Mandujano, María C. |
| author_facet | Zepeda, Verónica Golubov, Jordan Mandujano, María C. |
| author_sort | Zepeda, Verónica |
| collection | ABM |
| description | Background and Aims: The family Cactaceae possesses the largest number of species listed as endangered, but biological information as well as ecological studies are needed to assess the conservation status of cacti and apply guidelines to include or exclude species from red lists. Astrophytum ornatum has a status of vulnerable, but its ecological situation has not been evaluated, so its local and regional status is unknown. The aim of this study was to determine factors influencing the maintenance of their populations to provide information to establish their conservation status.Methods: We analyzed the population structure, spatial distribution pattern and reproduction of A. ornatum in one remnant population in Cadereyta de Montes, Querétaro, Mexico.Key results: The species has an aggregated spatial distribution pattern, which suggests an interaction with nurse species or cracks and rocks that provide shade. Individuals are concentrated in the first size categories, 34% were reproductive, large plants have a greater number of reproductive structures but with less seeds per fruit in comparison to medium-sized plants.Conclusions: The studied population has a potential to grow because its population structure displays the typical form of species with common recruitment. This population structure, high density and the presence of small plants suggest that the remaining population of A. ornatum is in good condition; however, no recruitment of seedlings was observed, there is a high mortality in all size classes and the risks posed to the locality are its proximity to human settlements and sand banks. Global assessment suggests that A. ornatum should be considered a threatened species. |
| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-1230 |
| institution | Acta Botanica Mexicana |
| language | spa |
| publishDate | 2017 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-12302022-12-23T04:35:40Z Spatial distribution, size structure and reproduction of Astrophytum ornatum (Cactaceae) Distribución espacial, estructura de tamaños y reproducción de Astrophytum ornatum (Cactaceae) Zepeda, Verónica Golubov, Jordan Mandujano, María C. Cacteae nurse plants Red List spatial distribution pattern threatened species Cacteae distribución espacial especie amenazada Lista Roja nodriza Background and Aims: The family Cactaceae possesses the largest number of species listed as endangered, but biological information as well as ecological studies are needed to assess the conservation status of cacti and apply guidelines to include or exclude species from red lists. Astrophytum ornatum has a status of vulnerable, but its ecological situation has not been evaluated, so its local and regional status is unknown. The aim of this study was to determine factors influencing the maintenance of their populations to provide information to establish their conservation status.Methods: We analyzed the population structure, spatial distribution pattern and reproduction of A. ornatum in one remnant population in Cadereyta de Montes, Querétaro, Mexico.Key results: The species has an aggregated spatial distribution pattern, which suggests an interaction with nurse species or cracks and rocks that provide shade. Individuals are concentrated in the first size categories, 34% were reproductive, large plants have a greater number of reproductive structures but with less seeds per fruit in comparison to medium-sized plants.Conclusions: The studied population has a potential to grow because its population structure displays the typical form of species with common recruitment. This population structure, high density and the presence of small plants suggest that the remaining population of A. ornatum is in good condition; however, no recruitment of seedlings was observed, there is a high mortality in all size classes and the risks posed to the locality are its proximity to human settlements and sand banks. Global assessment suggests that A. ornatum should be considered a threatened species. Antecedentes y Objetivos: La familia Cactaceae tiene el mayor número de especies listadas en riesgo de extinción, pero la información biológica y poblacional de estas especies, necesaria para determinar su riesgo poblacional y su estatus de conservación en las listas rojas, es escasa o insuficiente. El estatus de Astrophytum ornatum es vulnerable, pero su situación ecológica no ha sido evaluada, por lo que no se conoce exactamente cuál es su condición local y regional. El objetivo de este estudio fue estimar algunos de los factores que influyen en el mantenimiento de sus poblaciones y aportar información que permita establecer su estatus de conservación.Métodos: En este trabajo se analizó la estructura poblacional, el patrón de distribución espacial y la reproducción de A. ornatum en una población remanente localizada en Cadereyta de Montes, Querétaro, México.Resultados clave: Astrophytum ornatum tiene un patrón de distribución espacial agregado, similar a otras especies que requieren nodrizas o grietas y rocas que les proporcionan sombra. La mayoría de sus individuos se concentran en las primeras categorías de tamaño, 34% son reproductivos, las plantas grandes presentan un mayor número de estructuras reproductivas (botones, flores, frutos) y un menor número promedio de semillas por fruto.Conclusiones: La población estudiada presenta un potencial de crecimiento ya que su estructura poblacional tiene la forma típica de especies con reclutamiento frecuente. Dicha estructura poblacional, la alta densidad y la presencia de plantas pequeñas sugieren que la población está en buenas condiciones; sin embargo, no se observó reclutamiento de plántulas y hay una alta mortalidad en todas las clases de tamaño, además los riesgos para esta población son la cercanía a núcleos de población humana y a bancos de materiales. La evaluación global sugiere que se considere la especie como amenazada. Instituto de Ecología, A.C. 2017-04-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo evaluado por pares application/pdf text/html https://abm.ojs.inecol.mx/index.php/abm/article/view/1230 10.21829/abm119.2017.1230 Acta Botanica Mexicana; No. 119 (2017); 35-49 Acta Botanica Mexicana; Núm. 119 (2017); 35-49 2448-7589 0187-7151 spa https://abm.ojs.inecol.mx/index.php/abm/article/view/1230/1419 https://abm.ojs.inecol.mx/index.php/abm/article/view/1230/html Derechos de autor 2017 Acta Botanica Mexicana |
| spellingShingle | Zepeda, Verónica Golubov, Jordan Mandujano, María C. Spatial distribution, size structure and reproduction of Astrophytum ornatum (Cactaceae) |
| title | Spatial distribution, size structure and reproduction of Astrophytum ornatum (Cactaceae) |
| title_full | Spatial distribution, size structure and reproduction of Astrophytum ornatum (Cactaceae) |
| title_fullStr | Spatial distribution, size structure and reproduction of Astrophytum ornatum (Cactaceae) |
| title_full_unstemmed | Spatial distribution, size structure and reproduction of Astrophytum ornatum (Cactaceae) |
| title_short | Spatial distribution, size structure and reproduction of Astrophytum ornatum (Cactaceae) |
| title_sort | spatial distribution, size structure and reproduction of astrophytum ornatum (cactaceae) |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/1230 |
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