Diversidad De Especies Arbustivas en Una Zona Semiárida Del Centro De México

Gelviz-Gelvez, Sandra Milena; Hernández, Numa P. Pavón

doi:10.5154/r.rchscfa.2012.08.049

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…with an annual mean temperature between 15 and 19 °C and an annual precipitation of less of 450 -700 mm. for a more detailed description of the study sites see Gelviz-Gelvez & Pavón (2013). The semiarid shrubland is characterized by Acacia farnesiana, Celtis pallida, Cordia boissieri, Dalea bicolor, Eysenhardtia polystachya, Forestiera angustifolia, Gymnosperma glutinosum, Karwinskia humboldtiana, Lantana involucrata and Montanoa tomentosa, among others (Gelviz-Gelvez & Pavón 2013).…”

Section: Methodsmentioning

confidence: 99%

Germination of seven species of shrubs in semiarid central Mexico: Effect of drought and seed size

et al. 2020

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Background: In semiarid ecosystems, many plant species are tolerant to drought. However, increased aridity as a result of climatic change could modify the capacity of germination and establishment. Hypothesis: Under drought conditions, small-seeded species will tend to germinate in higher proportions than large-seeded species because the former have larger surface-to-volume ratio, allowing for more rapid water uptake. Study species: Ageratina espinosarum, Flourensia resinosa, Montanoa tomentosa and Gymnosperma glutinosum (Asteraceae), Dalea bicolor, Eysenhardtia polystachya and Mimosa pringlei (Fabacecae). Study site: Hidalgo, Mexico. September 2015. Methods: We evaluated the effect of five water potential treatments on seed germination. Four dishes (replicates), each with 25 seeds, were used in each treatment. Seeds of each species were weighed and the relationship between seed germination under water stress and seed size was obtained. Results: Germination decreased as water potential was reduced; almost no seeds germinated at -0.8 MPa. The least sensitive species was Eysenhardtia polystachya, whose germination reached 35 % at -0.6 MPa. A positive relationship was found between seed size and germination proportion under water stress. Conclusions: Contrary to expectation, germination was higher in the large-seeded species in all drought treatments, suggesting that large seeds may have a greater capacity to retain water in dry environments.

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Section: Methodsmentioning

confidence: 99%

Germination of seven species of shrubs in semiarid central Mexico: Effect of drought and seed size

et al. 2020

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“…It is known that T. stans is a pioneer species that easily progresses in disturbed areas with stony soils and highly resistant to water stress [49] . Also, M. tomentosa is a typical secondary forest species that has a high capacity to colonize sites of highly disturbed condition such as soils with high nitrogen concentrations [50] .…”

Section: Floristic Compositionmentioning

confidence: 99%

Tree structure and composition of the secondary tropical deciduous forest in the Central Depression, Chiapas, Mexico

Ruiz

Farrera

Santiago

2020

NRCR

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Tropical deciduous forest is highly threatened and transformed by agricultural activities in Chiapas; however, little is known about its successional dynamics and regeneration potential. The objective of this research was to evaluate the regenerative capacity of secondary forests through changes in richness, diversity, composition, and structure in a forest reserve in the Central Depression of Chiapas. Twenty sampling units (SU) of 1,000 m2 were established in forests with different ages of abandonment (C10, C19, C35 and >C40, representing 10 years, 19 years, 35 years and 40 years, respectively), in which all individuals ≥5 cm normal diameter (ND) were measured. Attributes of structure and diversity were compared in each condition by analysis of variance and Tukey mean comparison test (p < 0.05) and floristic composition by ordination and classification analysis. A total of 142 species grouped in 96 genera and 41 families were recorded. Leguminosae was the family with the most species and individuals. The species with the highest relative abundances were Montanoa tomentosa (5.1%) and Tecoma stans (5%). Significant differences (p < 0.05) were found in cumulative richness, diversity (Shannon-Weiner H’ and 1D), density of individuals (ind ha-1), maximum height (m), basal area (m2 ha-1) and aboveground biomass (Mg ha-1). The multivariate analysis of variance procedure with permutations indicated significant differences (p < 0.05) in species composition between early (C10 and C19) and later (C35–C40) conditions. It was concluded that the structure and floristic composition of the secondary forest is recovering slowly (low resilience), so it is necessary to implement activities conducive to its conservation in the short term.

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“…La heterogeneidad ambiental en la distribución de especies se determinó mediante un análisis de correspondencia canónica (CCA), debido a que en este método de arreglo la composición de especies se relaciona directamente con las variables ambientales, conociendo si estos factores ambientales están afectando la distribución de hepáticas en el gradiente (Sánchez-González & López-Mata, 2003;Álvarez-Yépis, Martínez-Yrízar, Búrquez, & Lindquist, 2008;Gelviz-Gelvez & Pavón-Hernández, 2013). Para ello se calculó el Índice de Valor de Importancia (IVI) para cada una de las especies (según Zepeda et al, 2014), calculando la densidad relativa, cobertura relativa y frecuencia.…”

Section: Análisis De Datosunclassified

Composición y distribución de hepáticas (Marchantiophyta) en un intervalo altitudinal en la Cordillera Oriental de Colombia

Cacua-Toledo¹,

Serrano-Cardozo²,

Ramírez‐Pinilla³

2018

RBT

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Composition and distribution of liverworts (Marchantiophyta) in a continuous altitudinal range on the Cordillera Oriental of Colombia. The species composition of liverworts varies with altitude in the Northern part of the Andes due to the relationship of biotic (vegetation) and abiotic factors (temperature, humidity, and sunlight brightness). In order to test this affirmation we determined the diversity, species composition, abundance, and distribution of species of Marchantiophyta in an altitudinal range from 2 400 to 3 400 m on the Colombian Cordillera Oriental, and established how these vary with altitude and life-zones, regarding abiotic factors. Samples, taken every 200 m in the altitudinal range, and environmental data were registered during a year. We found 162 species, the composition of liverworts varied throughout the altitudinal gradient with a high number of unique species in each altitude. The maximum diversity was found at 3 000 m, along with a dominance of leafy habit and epiphytic species, while the higher richness of families and genera was found between 3 200 and 3 400 m. Anoplolejeunea conferta had the largest value of coverage in the zone, the highest value of importance value index (IVI), and the widest altitudinal distribution, from 2 400 to 3 000 m in four different substrates. The liverworts were distributed differently with altitude, we found a high beta diversity (0.864) due to the replacement of species, with more that 30 % of dissimilarity in species composition every 200 altitudinal meters, mainly depending on sunlight brightness variation. Accordingly, we found that abiotic factors like temperature, humidity, and sunlight brightness and its relationship vegetation are determinant in the diversity and altitudinal distribution of liverworts in the study area. Rev. Biol. Trop. 66(2): 559-570. Epub 2018 June 01.

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Diversidad De Especies Arbustivas en Una Zona Semiárida Del Centro De México

Cited by 5 publications

References 32 publications

Germination of seven species of shrubs in semiarid central Mexico: Effect of drought and seed size

Germination of seven species of shrubs in semiarid central Mexico: Effect of drought and seed size

Tree structure and composition of the secondary tropical deciduous forest in the Central Depression, Chiapas, Mexico

Composición y distribución de hepáticas (Marchantiophyta) en un intervalo altitudinal en la Cordillera Oriental de Colombia

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