The population dynamics of an endemic collectible cactus

Mandujano, María C.; Bravo, Yolotzin; Verhulst, Johannes; Carrillo-Angeles, Israel G.; Golubov, Jordan

doi:10.1016/j.actao.2014.12.004

Cited by 8 publications

(7 citation statements)

References 34 publications

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“…Based on this information, the effect on the population of this species of continuous extraction of this resource was evaluated. This analysis was performed in the knowledge that when plants were taken from their natural habitats the population might be affected by several factors, such as retrogression and high mortality in all size classes, coupled with low seed production (Mandujano et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Ethnobotany of native cacti in the northeast region of Brazil: can traditional use influence availability?

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Ethnobotany of native cacti in the northeast region of Brazil: can traditional use influence availability?

et al. 2019

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“…Matrix projection models predict that increasing the size of the soil seed bank has little effect on the population growth rate in Opuntia macrocentra , Ariocarpus scaphirostris and Astorphytum capricorne (Mandujano et al . ,b, ). On the other hand, Mandujano et al .…”

Section: Introductionmentioning

confidence: 99%

Ecological longevity of Polaskia chende (Cactaceae) seeds in the soil seed bank, seedling emergence and survival

et al. 2017

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Soil seed banks are essential elements of plant population dynamics, enabling species to maintain genetic variability, withstand periods of adversity and persist over time, including for cactus species. However knowledge of the soil seed bank in cacti is scanty. In this study, over a 5-year period we studied the seed bank dynamics, seedling emergence and nurse plant facilitation of Polaskia chende, an endemic columnar cactus of central Mexico. P. chende seeds were collected for a wild population in Puebla, Mexico. Freshly collected seeds were sown at 25 °C and 12-h photoperiod under white light, far-red light and darkness. The collected seeds were divided in two lots, the first was stored in the laboratory and the second was use to bury seeds in open areas and beneath a shrub canopy. Seeds were exhumed periodically over 5 years. At the same time seeds were sown in open areas and beneath shrub canopies; seedling emergence and survival were recorded over different periods of time for 5 years. The species forms long-term persistent soil seed banks. The timing of seedling emergence via germination in the field was regulated by interaction between light, temperature and soil moisture. Seeds entered secondary dormancy at specific times according to the expression of environmental factors, demonstrating irregular dormancy cycling. Seedling survival of P. chende was improved under Acacia constricta nurse plants. Finally, plant facilitation affected the soil seed bank dynamics as it promoted the formation of a soil seed bank, but not its persistence.

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“…and What is its reproductive success (fruit set and seed set) during the reproductive events throughout the year? The expectation was that A. ornatum had a flowering period in either a fixed period (A. asterias and A. capricorne; Bravo-Hollis & Sán-chez-Mejorada 1991, Mandujano et al 2015) or over the year (A. myriostigma;López-Flores 2012), and have an obligate xenogamous breeding system as has been found for its congener A. asterias (Strong & Williamson 2007).…”

Section: Reproductive Ecology Of Star Cactusmentioning

confidence: 99%

Reproductive ecology of the threatened "star cactus" <em>Astrophytum ornatum</em> (Cactaceae): a strategy of continuous reproduction with low success

et al. 2017

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Controlled pollinations to determine the mating system and determination of the Outcrossing Index (OCI), the pollen /ovule ratio and breeding system. Results: Astrophytum ornatum produced flower buds throughout the year, but 89.2% of them were aborted. Four events of ephemeral flowering population were presented per year. The species is self-incompatible and controlled pollinations indicated pollinator limitation of several bee species. The OCI indicates that the species is facultative xenogamous, and pollen/ovule ratio indicates obligate xenogamy. On average there were 54 seeds/fruit and individuals produced 4 fruits/year. Conclusions: The continuous production of buds had rarely been reported for cacti. Intrapopulation bloom is one of the shortest recorded for the family and it produces high floral synchrony. The low number of seeds / fruit and flowers / individual, coupled with the narrow niche breadth of species and various anthropogenic factors place Astrophytum ornatum as a susceptible species to be extinct. Key words: continuous production of flower buds, reproductive success, breeding system, mating system, phenology Ecología reproductiva del "cactus estrella" Astrophytum ornatum (Cactaceae): una estrategia de reproducción continua con bajo éxito Resumen Antecedentes: No existen estudios precisos sobre la biología reproductiva de Astrophytum ornatum, especie endémica y en riesgo. Preguntas: ¿Cómo es la fenología de la especie? ¿Cuáles son los sistemas de cruza y apareamiento? y ¿Cuál es el éxito reproductivo? Especie de estudio: Astrophytum ornatum (Cactaceae). Sitio de estudio y fechas: Observaciones de 2010 a 2011 en la población más densa de A. ornatum en la Barranca de Metztitlán (Hgo. México). Métodos: Censos mensuales y seguimiento de estructuras reproductivas. Seguimiento de flores en antesis. Polinizaciones controladas para determinar el sistema de cruza y determinación del índice de entrecruza de Cruden (OCI) y de la relación polen/óvulo para estimar el sistema de apareamiento. Resultados: Astrophytum ornatum produjo botones florales todo el año pero el 89.2% de ellos fueron abortados. Se presentaron cuatro eventos efímeros de floración poblacional/año. La especie es autoincompatible y las polinizaciones controladas indicaron escasez de polinizadores (abejas). La especie es xenógama facultativa según el OCI o xenógama obligada por la relación polen/óvulo. En promedio se producen 54 semillas/fruto y 4 frutos/individuo/año. Conclusiones: La producción continua de botones florales es un fenómeno raramente reportado para cactáceas. La floración intrapoblacional constituye uno de los registros más cortos para la familia y produce una alta sincronía floral. El bajo número de semillas/fruto y de flores/individuo, aunado a la amplitud restringida del nicho de la especie y a diversos factores antropogénicos sitúan a Astrophytum ornatum como especie susceptible de extinción. Palabras clave: producción continua de botones florales, éxito reproductivo, sistema de apareamiento, sistema de cruza, fenología Bo...

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The population dynamics of an endemic collectible cactus

Cited by 8 publications

References 34 publications

Ethnobotany of native cacti in the northeast region of Brazil: can traditional use influence availability?

Ethnobotany of native cacti in the northeast region of Brazil: can traditional use influence availability?

Ecological longevity of Polaskia chende (Cactaceae) seeds in the soil seed bank, seedling emergence and survival

Reproductive ecology of the threatened "star cactus" <em>Astrophytum ornatum</em> (Cactaceae): a strategy of continuous reproduction with low success

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