El effecto del microambiente en la conductividad estomática de &lt;em&gt;Buddleia cordata&lt;/em&gt; H. B. K., en la Reserva del Pedregal de San Ángel

Ramos-Vázquez, Alfredo; Barradas, Vı́ctor L.

doi:10.17129/botsci.1551

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…Senecio praecox reached the highest rooting probabilities in the nursery and the polypropagator without a moisture supply, which reflect its adaptation to dry environments. Differing from the other studied species, it is deciduous, has superficial roots and stores water in the stems, while the others only avoid low water availability by having deeper roots (Ramos-Vázquez and Barradas, 1998;Corona, 1999;Degollado, 2000;Barradas et al, 2004). The influence of plant susceptibility to water stress in rooting capability has been reported for Colutea arborescens (de Andrés, 1999).…”

Section: Discussionmentioning

confidence: 90%

Vegetative propagation of native species potentially useful in the restoration of Mexico City’s vegetation

Ramos-Palacios¹,

Orozco‐Segovia²,

Sánchez‐Coronado³

et al. 2012

Rev.Mex.Biodiv.

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Hardwood and softwood cuttings of Buddleja cordata HBK, Dodonaea viscosa Jacq and Senecio praecox D.C. were tested to know their ability to form adventitious roots. Cuttings were prepared in 2 different seasons (wet and dry) and treated with different microclimatic conditions and auxin concentrations (IBA and NAA). Hardwood and softwood cuttings of B. cordata rooted during the dry and wet season, whilst hardwood and softwood cuttings of D. viscosa rooted only in the wet season, cuttings of S. praecox rooted only in wet season with a higher rooting for hardwood than softwood cuttings. Low hormone concentrations (10 -100 ppm) favored the rooting percentage more than high concentrations (1000 -10 000 ppm). However, high hormone concentrations favored number, length of roots and number of developed shoots. Natural regeneration of these species is limited and the species are difficult to propagate from seeds. Vegetative propagation of these species could be an alternative to get clonal planting stock for reforestation programs in some Mexico City areas.

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Section: Discussionmentioning

confidence: 90%

Vegetative propagation of native species potentially useful in the restoration of Mexico City’s vegetation

Ramos-Palacios¹,

Orozco‐Segovia²,

Sánchez‐Coronado³

et al. 2012

Rev.Mex.Biodiv.

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“…PAR); (2) the points below the selected function are the result of a change in any of the other variables (e.g. VPD and T A ), and (3) there are no synergistic interactions (Jarvis 1976, Fanjul & Barradas 1985, Jones 1992, Ramos-Vázquez & Barradas 1998, Barradas et al 2004).…”

Section: The Envelope Function Methodsmentioning

confidence: 99%

Potential vulnerability to climate change of four tree species from the central mountain region of Veracruz, Mexico

Esperón-Rodríguez¹,

Barradas²

2014

Clim. Res.

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We define vulnerability here as the extent to which climate change may damage or harm a system, depending not only on a system's sensitivity, but also on its ability to adapt to new climatic conditions. Current climate change has already affected the Earth's biodiversity, and the rate of change is likely to accelerate in the future. It is expected that climate change will affect the performance, structure and distribution of ecosystems, species and genetic constituents. Changes in temperature and precipitation, and in the frequency and intensity of extreme events, can directly influence ecosystem functioning. To determine the vulnerability or fragility of different species to climate change, we used the envelope function method, because of its capacity to analyze the variables that directly affect different species; by measuring the effect of climate variables on stomatal conductance, this provided an effective analysis of the diversity of eco-physiological responses. Using this method to assess vulnerability helped us predict the extreme values that the species could tolerate; and also gave information about the species' sensitivity. We analyzed the effects of air temperature, photosynthetically active radiation, vapor pressure deficit and leaf water potential on the stomatal conductance in 4 tree species (Alnus acuminata, Quercus xalapensis, Liquidambar styraciflua and Pinus ayacahuite) from different altitudinal ranges in the central region of Veracruz, Mexico, in Las Grandes Montañas. Knowing how vulnerability affects the species and ecosystems is a key element of maintaining regional biodiversity.

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“…This analysis has three assumptions: (1) The envelope function denotes the maximum response of coffee yield to the chosen variable (e.g., T); (2) all points under the selected envelope function are due to the change caused by some other variable (e.g., Pp, etc. ); and (3) non-synergism is assumed in the envelope limit [35,[57][58][59][60]. The coffee yield relationship as a function of precipitation (Pp) and temperature (T) was assigned by the values of the envelope-limit function that fit the quadratic equations: Yield Pp = A + BPp + CPp 2 and (1)…”

Section: The Envelope Function Analysismentioning

confidence: 99%

Panorama of Coffee Cultivation in the Central Zone of Veracruz State, Mexico: Identification of Main Stressors and Challenges to Face

Gabriel-Hernández,

Barradas

2024

Sustainability

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Coffee is one of the most traded crops worldwide. In the state of Veracruz, Mexico, coffee has been a strategic crop due to its economic, social, environmental, and cultural characteristics that differentiate it from other crops, contributing to the economy of almost 86,000 producers. Several studies have shown that climate is the main cause of the decrease in coffee production and yield. Due to the multi-faceted importance of coffee for the state, the relationship of coffee production and yield with the variables of precipitation (mm) and temperature (°C) from 2003 to 2022 was analyzed through the implementation of a mathematical model that was able to identify that both the total volume of coffee production is decreasing on average at a rate of 7614.9 Mg year−1 as well as the yield, with a significant decrease of 0.106 Mg year−1. It was also found that the optimum temperature value is 18.7 °C, and the optimal precipitation is 1700 mm for the development of coffee. This model also shows that yield is more sensitive to temperature than to precipitation in the study area. Through the application of surveys to 360 producers in 16 coffee-growing municipalities, seven stressors were identified that together hinder the continuity of the coffee industry in the state. These stressors are (1) economic, (2) climatic, (3) land use, (4) technical, (5) social, (6) political, and (7) other. Finally, some strategies are herein proposed to improve coffee production towards greater sustainability, such as agricultural restructuring at the national, regional, and local levels as well as programs and policies to support producers for the continuity of the crop in the region.

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El effecto del microambiente en la conductividad estomática de <em>Buddleia cordata</em> H. B. K., en la Reserva del Pedregal de San Ángel

Cited by 5 publications

References 10 publications

Vegetative propagation of native species potentially useful in the restoration of Mexico City’s vegetation

Vegetative propagation of native species potentially useful in the restoration of Mexico City’s vegetation

Potential vulnerability to climate change of four tree species from the central mountain region of Veracruz, Mexico

Panorama of Coffee Cultivation in the Central Zone of Veracruz State, Mexico: Identification of Main Stressors and Challenges to Face

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