Demography of the cycad Ceratozamia mirandae (Zamiaceae) under disturbed and undisturbed conditions in a biosphere reserve of Mexico

Pérez‐Farrera, Miguel Ángel; Vovides, Andrew P.; Octavio‐Aguilar, Pablo; González‐Astorga, Jorge; Cruz-Rodríguez, Jesús de la; Jonapá, Rigoberto Hernández; Maza-Villalobos, Susana

doi:10.1007/s11258-006-9135-2

Cited by 50 publications

(39 citation statements)

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“…Although there are various attempts to calculate age in cycads (Vovides, 1990, Pérez-Farrera and Vovides, 2004, Pérez-Farrera et al, 2006Salomé-Castañeda, 2009), given the characteristics of this group, precise data is not easily achieved. According to studies in several cycads El conocimiento de la edad de individuos de cícadas mexicanas podría contribuir o determinar el precio potencial a pagar por ellos.…”

Section: Resultsmentioning

confidence: 99%

“…According to studies in several cycads El conocimiento de la edad de individuos de cícadas mexicanas podría contribuir o determinar el precio potencial a pagar por ellos. A pesar de existir diversos intentos por calcular la edad en cícadas (Vovides, 1990;Pérez-Farrera y Vovides, 2004;Pérez-Farrera et al, 2006;Salomé-Castañeda, 2009), debido a las características propias de este grupo el dato preciso no se logra fácilmente. De acuerdo a los estudios realizados en varias especies de cícadas (Pérez-Farrera et al, 2006;Octavio-Aguilar et al, 2008), la permanencia de los individuos adultos y juveniles ha resultado de vital importancia para la conservación de las poblaciones silvestres.…”

Section: Resultsunclassified

“…A pesar de existir diversos intentos por calcular la edad en cícadas (Vovides, 1990;Pérez-Farrera y Vovides, 2004;Pérez-Farrera et al, 2006;Salomé-Castañeda, 2009), debido a las características propias de este grupo el dato preciso no se logra fácilmente. De acuerdo a los estudios realizados en varias especies de cícadas (Pérez-Farrera et al, 2006;Octavio-Aguilar et al, 2008), la permanencia de los individuos adultos y juveniles ha resultado de vital importancia para la conservación de las poblaciones silvestres. Disminuir el número de individuos adultos en poblaciones naturales podría tener un potencial deterioro de las mismas e incluso riesgo de desaparecer (Salomé-Castañeda, 2009), por lo que es necesario favorecer la protección y conservación de las poblaciones y poner especial atención en individuos jóvenes y adultos.…”

Section: Resultsunclassified

“…Such is the case of Dioon edule, Zamia furfurace, Mexican Ceratozamia in Veracruz, Dioon merolae, Ceratozamia mirandae, Ceratozamia matudae, Zamia soconuscensis in Chiapas, Dioon caputoi in Puebla, Dioon spinulosum in Oaxaca and Dioon edule in Querétaro (Vovides, 2002 , Pérez-Farrera andVovides, 2004;Pérez Farrera et al, 2006;Cabrera-Toledo et al, 2008;Salome-Castañeda, 2009;. Ecological and population studies of crop species grown or feasible to be grown are needed, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…In such demographic studies, methods include matrix projections, which allow and assess the species conservation status, identifying critical stages of life cycle, and probability soconuscensis en Chiapas, Dioon caputoi en Puebla, Dioon spinulosum en Oaxaca y Dioon edule en Querétaro (Vovides, 2002;Pérez-Farrera y Vovides, 2004;Pérez-Farrera et al, 2006;Cabrera-Toledo et al, 2008;Salomé-Castañeda, 2009;. Estudios ecológicos y poblacionales de las especies cultivadas o factibles de cultivarse, por ejemplo estudios demográficos, son necesarios para respaldar la producción en viveros rurales y no poner en riesgo la supervivencia de las mismas (INE-SEMARNAP, 2000).…”

Section: Introductionunclassified

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Comercialización de cícadas mexicanas (Zamiaceae) en Atlixco, Puebla. Un estudio exploratorio

Moreno

Castañeda

Domínguez

2018

Remexca

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Las cícadas mexicanas son plantas de larga vida con alto potencial ornamental, debido a lo cual han sido objeto de extracción de sus poblaciones silvestres con fines de comercialización. Dicha extracción junto con otras presiones como la destrucción de su hábitat, han desencadenado la protección de sus poblaciones silvestres por leyes nacionales e internacionales, por lo que en México son consideradas como una prioridad para su conservación biológica. Su propagación en viveros con fines comerciales y de reforestación es recomendable, y coincide con la necesidad de realizar estudios de mercado que brinden información para vincular la producción- comercialización bajo una dinámica sustentable. El presente es un estudio de tipo exploratorio, descriptivo y transversal referente a la comercialización de cícadas mexicanas (Zamiaceae) en Atlixco, Puebla. Se visitaron 107 viveros de junio 2012 a marzo de 2013; se administraron encuestas a 383 consumidores(as) potenciales de plantas ornamentales y 13 comercializadores(as) de cícadas. Se identificó la venta de éstas en 57% de viveros, y 40.9% de ellos tenían a la venta 4 especies mexicanas: Zamia furfuraceae, Dioon edule, Dioon spinulosum y Ceratozamia sp., de las cuales se comercializan plantas adultas extraídas de poblaciones silvestres. Se recomienda una comercialización diferenciada según los actores involucrados en esta cadena que destaquen su importancia ecológica, cultural y económica.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsunclassified

Section: Introductionmentioning

confidence: 99%

Section: Introductionunclassified

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Comercialización de cícadas mexicanas (Zamiaceae) en Atlixco, Puebla. Un estudio exploratorio

Moreno

Castañeda

Domínguez

2018

Remexca

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Surviving background extinction: Inferences from historic and current dynamics in the contrasting population structures of two endemic Mexican cycads

et al. 2018

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Ecological and microevolutionary perspectives were used to investigate signs of background extinction in two endemic species. We studied relict populations of the cycad Dioon caputoi, contrasting its population structure and neighborhood size with those of Dioon planifolium as a demographically healthier reference population. Population dynamics analysis was performed on two populations of D. caputoi through Integral Projection Models and genetic neighborhoods compared between species through 172 Inter Simple Sequence Repeat loci performed in one population of each of the two study species. The D. caputoi populations mostly comprised adult plants, while D. planifolium presented mainly juvenile individuals. Dioon caputoi showed equilibrium in population growth (i.e., λ ≈ 1), with low recruitment, and its genetic neighborhood revealed highly related individuals in a unique distance class (r ij = 0.407, 33 m). A contrasting pattern was found in D. planifolium, which showed higher relatedness in the first distance class (r ij = 0.543, 5 m), gradually decreasing to 20 m. The discrepancies between the two species reflect different strategies of persistence. Dioon caputoi conserves a relict dynamics with signs of a multigenerational, attritional loss of reproductive fitness, while D. planifolium does not. This study furthers our understanding of the background extinction process and the information will thus contribute to the management and conservation of this endangered species. K E Y W O R D Sbackground extinction, cycad demography, Dioon, dispersion, Tehuacán-Cuicatlán biosphere reserve

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Cycads: An Overview

Goel

Khuraijam

2015

Plant Biology and Biotechnology

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Cycads are regarded as the "Living Fossils" and belong to a specialized group of plants having ancient lineage possessing great signifi cance from the evolutionary point of view. During excavations, the cycad fossils located and accepted as related to the similar lineage as the present-day cycads have been known from the early Permian period, ca. 280-320 Myr ago. They had been popularly known as "Plant Dinosaur" and were generally known as the most dominant plant group in the Mesozoic period. The relict group of the seed plants was worldwide in their distribution and dominant in the plant world as the dinosaurs were then at the peak in the animal world. They were eaten by some herbivorous dinosaurs, such as Stegosaurs . During that period the plant group Bennettitales or cycadeoids was in abundance which had superfi cial resemblance with cycads but was more similar and closer to the angiosperms. The Jurassic period is generally called as the "Age of Cycads" because they were very common at that time. In fact the cycads represent the basal living lineage of the presentday seed-bearing angiosperms.The taxonomic isolation and extreme antiquity of cycads have attributed them intrinsic interest and conservational importance which is disproportionate to the paucity of members because of their limited and disjunct distribution. The cycads are dioecious and very slow-growing plants; as a result they are getting extremely rare in the natural habitat. Due to their rarity, very attractive foliage and beautiful cones, cycads are considered as the prized collections in private and the public gardens leading to over exploitation from natural habitats and illegal trade in the international market. Therefore, international trade and the movement of A.

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Demography of the cycad Ceratozamia mirandae (Zamiaceae) under disturbed and undisturbed conditions in a biosphere reserve of Mexico

Cited by 50 publications

References 44 publications

Comercialización de cícadas mexicanas (Zamiaceae) en Atlixco, Puebla. Un estudio exploratorio

Comercialización de cícadas mexicanas (Zamiaceae) en Atlixco, Puebla. Un estudio exploratorio

Surviving background extinction: Inferences from historic and current dynamics in the contrasting population structures of two endemic Mexican cycads

Cycads: An Overview

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