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January 2007 - April 2015
Publications
Publications (45)
La región Otomí Querétaro Sur presenta degradación de suelos debido a los derivados químicos y salinización resultado de las actividades agropecuarias, erosión hídrica y eólica del suelo. Entre las prácticas agrícolas recomendadas para conservación de suelos y secuestro de C se encuentran la adición de materia orgánica estabilizada (compostas y lom...
Background: Corn is the most important crop in Mexico, but it can be affected by climate change. Small farmers from arid and semiarid ecosystems mainly use rainfed native landraces with short productive cycles (less than 90 days), which are adapted to elevated temperatures and intense drought. Among these landraces we can find the Norther Conical c...
RESUMEN El análisis de los datos históricos del conocimiento de la re-carga, descarga y el desequilibrio hidrológico resultante, permi-ten explicar la conformación del acuífero Rioverde. Este artículo ordena y sintetiza a partir de estudios geohidrológicos, de cen-sos agrícolas y de población, las características más relevantes de los acuíferos sup...
Objetivo:
Identificar la percepción social de informantes clave, pertenecientes a tres comunidades de la Huasteca Potosina, sobre la participación del clima y los posibles efectos negativos de la variabilidad y el CC, que padecen a escala local en sus capitales y medios de vida.
Metodología:
Se compararon los datos del Programa Estatal de Acción a...
Biosolids application in semiarid rangelands has been proposed as a viable alternative for the rehabilitation of degraded soils. We analyzed the effect of rate, time, and number of applications of biosolids per year on the growth of herbaceous vegetation. Summer and winter single applications and a dual application (summer + winter) of biosolids we...
Interest in invasive species has increased around the world over the last several decades. In Mexico, studies on invasive species date as early as 1939 and the number of publications has increased considerably in recent decades. However, to our knowledge, the analysis of information gaps and research priorities is lacking. Therefore, it is necessar...
Human activities give rise to processes which affect the structure and ecological functions of ecosystems. Therefore it is important to assess the wildlife habitat conditions. In this research work, quantitative and cartographic methods were used to evaluate the connectivity between two biosphere reserves. The first one is located in the southern s...
This article is dedicated to the chronological description of important records or events that have occurred in the past with regards to the generic names Echinofossulocactus and Stenocactus. A typical characteristic of plants from this genus with these competing names is the presence of numerous (up to 141 in the case of E. multicostatus) narrow a...
The ecological relationships of "pitayo" and "cardón" were studied in the Sayula, Jalisco Basin. A multivariate approach was used considering three sets of explanatory variables: geographical (FG), edaphic (E) and biotic (B). Three columnar cacti species Stenocereus queretaroensis, and S. dumortieri and Pachycereus grandis were found. According to...
It has been said for a long time that mesquite reduces significantly cover and productivity of herbaceous vegetation in the range lands. Likewise there are evidences showing the opposite. This controversy make us think that this interaction is not fully understood. This work evaluated the effect of mesquite on the herbaceous vegetation along a grad...
Las acciones y omisiones del presente en materia de política forestal pueden clarificarse si se revisan los antecedentes históricos. Por ello, el objetivo de esta investigación fue analizar la influencia del contexto internacional sobre las políticas forestales implementadas durante el régimen de Porfirio Díaz. Se amplía el panorama sobre las de us...
Oaxaca state is considered one of the most important Mexican hot spots because of the huge richness and diversity it contains, and the increasing conversion of forests and tropical forest that threatens the integrity and stability of these tropical ecosystems. The objectives of this study were to analyze changes in land cover and land use in two mu...
El estado de Oaxaca es considerado como uno de los hot spots mexicanos más importantes no solo por la enorme riqueza y biodiversidad que alberga, sino también, por la creciente transformación de sus bosques y selvas que amenazan la integridad y permanencia de estos ecosistemas tropicales. Los objetivos de este trabajo fueron analizar los cambios en...
Aims Facilitation by nurse plants is a common interaction in harsh environments and this positive plant-plant interaction may
promote vegetation recovery in ecosystems affected by human activities. Determining the relevance of this process, however,
requires assessing how nurse plants influence the establishment of other species, as well as the pro...
Rainwater harvesting (RWH) provides various social, environmental, and economic benefits. It is important to first consider individual preferences and willingness to use harvested water for different purposes in order to encourage a community to use RWH and establish strategies that allow for the introduction of an alternative water supply, and add...
Grazing represents one of the most common disturbances in drylands worldwide, affecting both ecosystem structure and functioning. Despite the efforts to understand the nature and magnitude of grazing effects on ecosystem components and processes, contrasting results continue to arise. This is particularly remarkable for the biological soil crust (B...
Forest fragmentation affects seed production, but little is known about how seeds are distributed in fragmented forests after primary dispersion and how this affects their interactions with other organisms. This study addressed these issues in a fragmented oak forest of Quercus laeta where four habitat types were recognized: interior and edge of pa...
Se estudiaron características fisiológicas y morfológicas de plántulas de especies leñosas (nodrizas) y suculentas (protegidas), las cuales se distribuyen en un gradiente ambiental en el Altiplano Mexicano. Del extremo mésico se eligieron Acacia schaffneri, A. farnesiana y Opuntia jaliscana y, del extremo xérico se escogieron A. schaffneri, Prosopi...
We studied physiological and morphological characteristics of woody seedlings (nurses) and succulents (protected) which are distributed in an environmental gradient in the Mexican Plateau. Species from the mesic extreme of the gradient (Acacia schaffneri, A. farnesiana, Opuntia jaliscana) and from the xeric extreme (A. schaffneri, Prosopis laevigat...
We studied physiological and morphological characteristics of woody seedlings (nurses) and succulents (protected) which are distributed in an environmental gradient in the Mexican Plateau. Species from the mesic extreme of the gradient (Acacia schaffneri, A. farnesiana, Opuntia jaliscana) and from the xeric extreme (A. schaffneri, Prosopis laevigat...
Resumen Para probar la hipótesis de que los piñoneros mexicanos (Pinus cembroides) y los piñoneros Johannis (P. johannis) crecen bajo diferentes condiciones ambientales, se muestreó la flora asociada a ambas especies a lo largo de dos transectos perpendiculares de 20 m en 40 sitios. Los patrones se analizaron con el programa TWINSPAN, el cual produ...
To test the hypothesis that Mexican pinyons (Pinus cembroides) and Johannis pines (P. johannis) grow under different environmental conditions, the flora associated with both species was sampled along two 20-m perpendicular transects at 40 sites. Patterns were analyzed with the two-way-indicator-species program, which yielded six groups with Mexican...
An experiment was conducted in three wild grass species of Bouteloua genus to compare the effect of application of biosolids on the accumulation of heavy metals, biomass production, and nutrient uptake. Biosolids were applied at rates of 0, 3.5, 7, and 10.5 Mg ha−1 to two different soil types collected from the southern Chihuahuan Desert. The shoot...
Although the pulque magueys (genus Agave) have an important function in the development of the human populations of Mesoamerica, the study of their humanization is incipient. The objective of the present study was to know the morphological variability of the pulque magueys of the Salmianae section of the genus Agave with respect to their humanizati...
Although the pulque magueys (genus Agave) have an important function in the development of the human populations of Mesoamerica, the study of their humanization is incipient. The objective of the present study was to know the morphological variability of the pulque magueys of the Salmianae section of the genus Agave with respect to their humanizati...
Resumen Se realizó la modelación de la dinámica de cambio en el uso de suelo y la vegetación en la región de la Sierra Madre Oriental del estado de San Luis Potosí, considerado un sitio de importancia para la conservación en México por su alta biodiversidad. Para determinar la variación espacial se analizaron imágenes de satélite en un período de 1...
The Rioverde valley can be geographically divided in two areas: North, with calcium sulfate water, C4S1 and C5S1 water classes, and undrinkable water, used for crop production, and South, with calcium bicarbonate, C1S1, C2S2 and C3S1 water classes, and drinking water for different possible uses. Due to the excellent water quality in the south, the...
The Rioverde valley can be geographically divided in two areas: North, with calcium sulfate water, C4S1 and C5S1 water classes, and undrinkable water, used for crop production, and South, with calcium bicarbonate, C1S1, C2S2 and C3S1 water classes, and drinking water for different possible uses. Due to the excellent water quality in the south, the...
Background/Question/Methods
Biological soil crusts (BSC) (cyanobacteria, lichens and bryophytes) are key elements in dryland ecosystems. BSC enhance soil stability and fertility, and influence hydrological processes. Inadequate land use such as intensive livestock grazing may severely alter BSC diversity and cover with potentially negative feedbac...
In the Mexican highlands there are several aridity gradients affecting Opuntia species composition and its biological function. Since environmental variations can affect plant traits like seed morphology as well as related processes, we conducted experiments in order to determine whether seed mass, testa hardness, seed imbibition, dormancy type, po...
The effect of different grazing intensities on the semiarid grasslands of the southern Chihuahuan Desert was studied using a fence-line contrast between a moderately grazed cattle ranch, from which goats and sheep had been excluded for forty-five years, and an ejido, heavily overgrazed for at least the last century. Each plant species density and c...
In this study we compared abundance and species richness of nocturnal rodents at the edge of gypsophilous grassland on an exposed gypsum substrate and 3 sites of microphilous shrubland, in northern San Luis Potosí, Mexico. We sampled at sites that differed in edaphic characteristics and vegetation structure, in the wet and dry seasons of 2003 and 2...
In this study we compared abundance and species richness of nocturnal rodents at the edge of gypsophilous grassland on an exposed gypsum substrate and 3 sites of microphilous shrubland, in northern San Luis Potosí, Mexico. We sampled at sites that differed in edaphic characteristics and vegetation structure, in the wet and dry seasons of 2003 and 2...
El perro llanero mexicano (Cynomys mexicanus) vive en una pequeña área (500-600 km2) del noreste de México. La especie está considerada en peligro de extinción debido principalmente a la fragmentación del hábitat, al reciente desarrollo y expansión agrícola en la porción norte de su limitada distribución geográfica y a la invasión de arbustos en el...
In the Meridional Highland of Mexico is located 35% of the Mexican species of Opuntia and some 144 variants, with different grade of humanizatian that they are used by their cladode for forage, nopalitos like greenness and their fruits. With the purpose of contributing to elucidate the taxonomy of the genus and the process of their domestication, 4...
El género Opuntia (sensu stricto) está formado por 189 especies (Anderson, 2001). Las 83 especies mexicanas de este género (Guzmán et al., 2003) han sido agrupadas en 17 series (Bravo, 1978). Registros arqueobotánicos respaldan una correlación de Opuntia con Homo sapiens mayor que 9000 años (Callen, 1966). En el neolítico del sur de la Altiplanicie...
In the southern region of the southern Chihuahuan Desert three common species of arborescent cacti are distributed over a north-west to south-east climatic gradient; Opuntia leucotricha, O. streptacantha, and Myrtillocactus geometrizans. In general, O. leucotricha is more abundant in the colder north-west section; M. geometrizans in the warmer sout...
We have delineated the spatio-temporal plant assemblages prevailing under contrasting environmental conditions at the southernmost part of the North American Graminetum in central Mxico and discuss the relative importance of these factors in determining plant community structure and composition. 353 line-transect samples were collected during 11 ye...
Con base en una técnica multivariable de ordenación directa, Análisis Canónico Parcial de Correspondencia, se investigó en pastizales del noreste de Jalisco la relación de la variabilidad temporal en sus patrones de composición florística con los elementos climáticos, toda vez ajustados los efectos atribuibles a suelo y manejo. La ordenación mostró...
