La vegetación del Valle de Tehuacán-Cuicatlán

Valiente‐Banuet, Alfonso; Casas, Alejandro; Alcántara, Ariel R.; Dávila, Patricia; Flores-Hernández, Noé; Arizmendi, Marı́a del Coro; Villaseñor, José Luís; Ramírez, José Ortega

doi:10.17129/botsci.1625

Cited by 83 publications

(112 citation statements)

References 8 publications

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“…This region is a semiarid zone with high biological diversity and a wide variety of ecosystems (Dávila et al 2002). This species has been reported in eight of 36 plant associations of the region (Delgado-Lemus et al 2014a, 2014bValiente-Banuet 2009).…”

Section: Study Sitementioning

confidence: 86%

Population Dynamics and Sustainable Management of Mescal Agaves in Central Mexico: Agave potatorum in the Tehuacán-Cuicatlán Valley

et al. 2015

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Mexico:Agave potatorum in the Tehuacán-Cuicatlán Valley. A total of 37 agave species are extracted from forests of Mexico for producing mescal. This activity has caused decline of numerous populations, and their sustainable management is indispensable for preventing species extinctions. Our study analyzed demographic information about Agave potatorum in the Tehuacán Valley with the goal of developing proposals for sustainable use for agaves in general. We studied protected populations in two contrasting environments, and through prospective analyses and real data about extraction and reforestation rates, we simulated different scenarios of actions. Our analyses indicate that the populations' growth rates (λ) in conserved populations are 0.9903 ± 0.062 and 1.021 ± 0.062, but viability analyses suggest that even those unmanaged populations would decrease 30% to 90% in 30 years. Survival and growth of early agave plant stages contribute most to λ; adult stages and fecundity have low contribution but their conservation is crucial for population recovery. Based on a successful management experience with A. cupreata, we suggest that at least 30% of reproductive plants should be left to ensure seed provision for natural and assisted populations' recovery. The reintroduction of plants at two early stages of growth is recommended, particularly 1-2-year-old plants, the size categories with the highest contribution to λ. Current efforts by local people to promote cattle exclusion from forest areas, seed collection, and their propagation in nurseries, and actions for recovery and conservation of populations are strategies of high value. Our research contributes to optimizing the effectiveness of such actions and aids in the conservation of other agave species.Dinámica de poblaciones y manejo sustentable de agaves mezcaleros en la región central de México: Agave potatorum en el Valle de Tehuacán-Cuicatlán. En total, 37 especies de agaves se extraen de los bosques de México para producir mezcal, lo que ha determinado la degradación o extinción de numerosas poblaciones. Su manejo sustentable es indispensable para evitar la extinción de poblaciones y aún especies. Nuestro estudio analizó información demográfica de poblaciones de Agave potatorum del Valle de Tehuacán con el fin de desarrollar propuestas generales para el uso sustentable de agaves. Estudiamos poblaciones conservadas de agave en dos ambientes contrastantes y a través de análisis prospectivos e información real sobre tasas de extracción y reforestación simulamos las consecuencias de diferentes escenarios de acciones para la conservación. Nuestros análisis indican que las tasas de crecimiento (λ) en poblaciones conservadas son 0.9903 ± 0.062 y 1.021 ± 0.062, respectivamente, pero los análisis de viabilidad poblacional sugieren que aún tales poblaciones decrecerían de 30 a 90%, respectivamente en 30 años. La sobrevivencia y crecimiento de las etapas tempranas del ciclo de vida contribuyen mayormente al valor de λ. Las etapas adultas y la fecundidad tienen baja contrib...

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Section: Study Sitementioning

confidence: 86%

Population Dynamics and Sustainable Management of Mescal Agaves in Central Mexico: Agave potatorum in the Tehuacán-Cuicatlán Valley

et al. 2015

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“…The Valley of Zapotitlán (18°19′45.44″N; 97°27′20.95″W), a local basin of the Tehuacán‐Cuicatlán Valley in Mexico, has an annual average rainfall of 380 mm, an annual mean temperature of 21°C and is located at 1,500 m a.s.l. Soils are loamey–clayey, calcaric and nonsaline, have neutral to basic pH and developed from lutites, with 55% plant cover of a shrubland dominated by Mimosa luisana (Valiente‐Banuet et al, ; Valiente‐Banuet & Verdú, ; Supplementary Information S1).…”

Section: Methodsmentioning

confidence: 99%

Incorporating phylogenetic metrics to microbial co‐occurrence networks based on amplicon sequences to discern community assembly processes

Goberna

Montesinos‐Navarro

Valiente‐Banuet

et al. 2019

Molecular Ecology Resources

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Co‐occurrence network analysis based on amplicon sequences is increasingly used to study microbial communities. Patterns of co‐existence or mutual exclusion between pairs of taxa are often interpreted as reflecting positive or negative biological interactions. However, other assembly processes can underlie these patterns, including species failure to reach distant areas (dispersal limitation) and tolerate local environmental conditions (habitat filtering). We provide a tool to quantify the relative contribution of community assembly processes to microbial co‐occurrence patterns, which we applied to explore soil bacterial communities in two dry ecosystems. First, we sequenced a bacterial phylogenetic marker in soils collected across multiple plots. Second, we inferred co‐occurrence networks to identify pairs of significantly associated taxa, either co‐existing more (aggregated) or less often (segregated) than expected at random. Third, we assigned assembly processes to each pair: patterns explained based on spatial or environmental distance were ascribed to dispersal limitation (2%–4%) or habitat filtering (55%–77%), and the remaining to biological interactions. Finally, we calculated the phylogenetic distance between taxon pairs to test theoretical expectations on the linkages between phylogenetic patterns and assembly processes. Aggregated pairs were more closely related than segregated pairs. Furthermore, habitat‐filtered aggregated pairs were closer relatives than those assigned to positive interactions, consistent with phylogenetic niche conservatism and cooperativism among distantly related taxa. Negative interactions resulted in equivocal phylogenetic signatures, probably because different competitive processes leave opposing signals. We show that microbial co‐occurrence networks mainly reflect environmental tolerances and propose that incorporating measures of phylogenetic relatedness to networks might help elucidate ecologically meaningful patterns.

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“…The vegetation is tropical dry forest in which dominant plant species are Acacia cochliacantha , Conzattia multiflora , Escontria chiotilla , Opuntia spp., Parkinsonia praecox , Solanum tridynamum and Stenocereus stellatus (Valiente‐Banuet et al . ).…”

Section: Methodsmentioning

confidence: 97%

Seed removal in a tropical North American desert: an evaluation of pre‐ and post‐dispersal seed removal in Stenocereus stellatus

2017

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To determine seed removal influence on seed populations, we need to quantify pre- and post-dispersal seed removal. Several studies have quantified seed removal in temperate American deserts, but few studies have been performed in tropical deserts. These studies have only quantified pre- or post-dispersal seed removal, thus underestimating the influence of seed removal. We evaluated pre- and post-dispersal seed removal in the columnar cactus Stenocereus stellatus in a Mexican tropical desert. We performed selective exclosure experiments to estimate percentage of seeds removed by ants, birds and rodents during the pre- and post-dispersal phases. We also conducted field samplings to estimate abundance of the most common seed removers. Birds (10-28%) removed a higher percentage of seeds than ants (2%) and rodents (1-4%) during pre-dispersal seed removal. Melanerpes hypopolius was probably the main bird removing seeds from fruits. Ants (62-64%) removed a higher percentage of seeds than birds (34-38%) and rodents (16-30%) during post-dispersal seed removal. Pogonomyrmex barbatus was probably the main ant removing seeds from soil. Birds and ants are the main pre- and post-dispersal seed removers in S. stellatus, respectively. Further studies in other S. stellatus populations and plants with different life forms and fruit types will contribute to evaluate seed removal in tropical American deserts.

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La vegetación del Valle de Tehuacán-Cuicatlán

Cited by 83 publications

References 8 publications

Population Dynamics and Sustainable Management of Mescal Agaves in Central Mexico: Agave potatorum in the Tehuacán-Cuicatlán Valley

Population Dynamics and Sustainable Management of Mescal Agaves in Central Mexico: Agave potatorum in the Tehuacán-Cuicatlán Valley

Incorporating phylogenetic metrics to microbial co‐occurrence networks based on amplicon sequences to discern community assembly processes

Seed removal in a tropical North American desert: an evaluation of pre‐ and post‐dispersal seed removal in Stenocereus stellatus

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