Edmundo García-Moya - Profile on Academia.edu (original) (raw)

Papers by Edmundo García-Moya

Invasive Plant Science and Management, 2014

Resumen El venado de Coues (Odocoileus virginianus couesi) es una de las 14 subespecies de venado... more Resumen El venado de Coues (Odocoileus virginianus couesi) es una de las 14 subespecies de venado cola blanca en México, se distribuye sobre 30.4 % de la república mexicana y es de alto valor cinegético. Se realizó una investigación en la Sierra del Laurel, municipio Calvillo, Aguascalientes, México, de la densidad del venado cola blanca en respuesta a los atributos del hábitat, estimada mediante el recuento de grupos fecales. El hábitat se describió por sus características topográficas, florístico-estructurales y agua disponible. Se determinó que la densidad fue mayor en el matorral subtropical, seguida de la presente en el bosque de Quercus y del pastizal inducido. Las variables que contribuyeron a explicar la abundancia fueron el tipo de vegetación, el índice de equidad de Pielou, el índice de predominio de Simpson, la densidad de Ipomoea murucoides, la riqueza florística y la altura media de las arbustivas, así como el porcentaje de suelo desnudo. No obstante, la existencia de otros factores demográficos del venado, como la relación de sexos, y de tipo antrópico como la fragmentación del hábitat, el sobrepastoreo, la caza furtiva, la presencia de paseantes y la proliferación de obras para ecoturismo no pueden descartarse como posibles causas de una mayor abundancia de este cérvido en el matorral subtropical, por lo que se requiere de la realización de más estudios sobre el particular. Abstract The Coues deer (Odocoileus virginianus couesi) is one of the 14 subspecies of white-tailed deer in Mexico and its distribution area encompasses 30.4 % of the Mexican Republic and it has a high cinegetic value. A research was carried out in Sierra del Laurel, in the municipality of Calvillo, Aguascalientes, Mexico, on the density of the white-tailed deer in response to the characteristics of the habitat, estimated by means of the count of fecal pellet groups. The habitat was characterized by its topographic and floral-structural traits and by availability of water. The density was determined to be higher in the subtropical shrubland, followed by that of the Quercus forest and of the induced grassland. The variables which accounted for the abundance of this deer species were vegetation type, Pielou's equity index, Simpson's predominance index, the density of Ipomoea murucoides, the floral wealth and the mean height of the shrubs, and the percentage of naked soil. However, the existence of other demographic factors of the dear, such as the sex ratios, as well as anthropic factors including the fragmentation of the habitat, overgrazing, furtive hunting, the presence of hikers and the proliferation of constructions for ecotourism cannot be discarded as possible causes of a larger abundance of this cervid in the subtropical shrubland; therefore, further studies on this topic are required.

Botanical Science, Feb 2015

Hintonia latiflora (Sessé & Moc. ex DC.) Bullock, the “quina amarilla”, is an American tree of th... more Hintonia latiflora (Sessé & Moc. ex DC.) Bullock, the “quina amarilla”, is an American tree of the tropical deciduous forest which is valuable because its bark has medicinal properties. The main area supplying the commercial quina amarilla is the northern of Guerrero state, Mexico. This contribution reports bibliographic information pertaining to the natural history and har- vesting in its whole distribution area. Also, it includes field data on the habitat, density, phenology, dispersal, architecture, harvest intensity, and commercialization in some populations from the upper Rio Balsas Basin. The results shows biophysical factors that are important for growth, establishment, and survival of the species. Phenology consists of flowering in spring-summer, foliation in summer, fruiting in late summer, and dispersal in winter. The dispersal is anemocorous and barocorous. Tree architecture is related to environmental factors and to bark harvesting. Density and availability of the species changes with site characteristics and the intensity of the harvesting. The commercialization involves three actors: gatherers, local middlemen, and regional traders. The historical prices of the bark to the consumers have increased, but considering inflation, really have decreased. The major threat to the populations of H. latiflora is harvesting intensity and careless practice of harvesting.

Hintonia latiflora (Sessé & Moc. ex DC.) Bullock, la “quina amarilla”, es un árbol americano propio del bosque tropical caducifolio, valioso, debido a que la corteza tiene propiedades medicinales. La principal zona de abasto comercial de quina amarilla está al norte del estado de Guerrero, México. Esta contribución aporta información bibliográfica en torno a la historia natural y del aprovechamiento de H. latiflora en toda su área de distribución. Además, incorpora datos de campo originales acerca del hábitat, densidad, fenología, dispersión, arquitectura, comercialización e intensidad en el aprovechamiento de algunas pobla- ciones de quina amarilla de la cuenca alta del Río Balsas. Se encontraron factores biofísicos importantes para el establecimiento, crecimiento y supervivencia de la especie. La fenología consiste en la floración en la primavera-verano, foliación en el verano, fructificación a finales del verano y dispersión durante el invierno. La dispersión es anemócora y barócora. La arquitectura arbórea se relaciona con factores ambientales y la cosecha de corteza. Se observó que la densidad y disponibilidad de la especie cambian con las características de los sitios y con la intensidad de recolección. La comercialización de la quina implica a tres actores: los recolectores, los acopiadores locales y los compradores regionales. Los precios históricos de la corteza al consumidor han aumentado pero al considerar los precios sin inflación, realmente han bajado. Se destaca que la mayor amenaza para las poblaciones es la intensidad de aprovechamiento y la práctica descuidada de la cosecha.

Revista de Biología Tropical, 2006

Population structure and environmental relationships of the tropical tree Nectandra rudis (Laurac... more Population structure and environmental relationships of the tropical tree Nectandra rudis (Lauraceae), a rare species in western Mexico. The tree N. rudis is a rare species from western Mexico of which community and population features are unknown. We studied a population in an altitudinal gradient, from 550-1 850 m above sea level in the Sierra de Manantlan, Jalisco, Mexico. We established four 60x48 m sample sites at vertical distances of 100 m along this altitudinal gradient. Within each plot, ten 100 m 2 circular sub-sampling units were randomly located. At each unit, we recorded diameter at breast height (dbh) and tree height for all woody vegetation ≥2.5 cm dbh. Basal area, tree density, frequency, species richness and importance values per species and plot. We estimated the vertical structure (total tree height) and diameter( as M=5log 10 N) for all N. rudis individuals. A direct ordination through Canonical Correspondence Analysis was done, involving amongst other species, edaphic and environmental data matrices. The record of 44 N. rudis individuals, in seven out the 56 plots sampled, represents the most septentrional record for the species and the first in Western Mexico. its density and basal area represented 4.5 % and 8.7 % respectively of the total estimated for the community. The greatest importance values were observed at 1 650 m above sea level. The population structure of N. rudis is structured into five diameter categories in an inverse "J" shaped distribution. This is a typical behavior observed to occur in the Lauraceae, which produces big seeds of short viability that germinate when there is high soil moisture content. The species tend to form dense seedling banks although only a reduced number of them are able to survive. Species richness varies from 27 to 39 at plot level; the greatest importance values for the plots on which N. rudis was found, corresponds to Urera verrucosa (Liebm.) V.W. Steinm., N. rudis, Ficus sp., Beilschmiedia manantlanensis Cuevas y Cochrane, amongst others. Canonical Correspondence Analysis suggests that environmental variables such as rooted trees, crown cover, litter depth and soluble magnesium are the more significant explanatory variables for the distribution and abundance of N. rudis. Rev. Biol. Trop. 56 (1): 247-256. Epub 2008 March 31.

Wild turkey (Meleagris gallopavo L.) was extirpated from "Sierra Fria", Aguascalientes,... more Wild turkey (Meleagris gallopavo L.) was extirpated from "Sierra Fria", Aguascalientes, Mexico, around the 50´s, but was reestablished in the area between 1992 and 1994. At present, the species is abundant in "Sierra Fria"; however, little is known about its food habits, reason which motivated the present study. The objective of this study was to document the diet composition of

Acta Botánica …, 1996

Acta Botánica Mexicana Instituto de Ecología AC murillom@ecologia.edu.mx ISSN (Versión impresa): ... more Acta Botánica Mexicana Instituto de Ecología AC murillom@ecologia.edu.mx ISSN (Versión impresa): 0187-7151 MÉXICO ... 1996 Gerardo Armando Aguado Santacruz / Edmundo García Moya / Cruz Velasco González / José Luis Flores Flores IMPORTANCIA DE LOS ...

Técnica Pecuaria en …

Los mecanismos de adaptación de las plantas a los factores ambientales se manifiestan en sus rasg... more Los mecanismos de adaptación de las plantas a los factores ambientales se manifiestan en sus rasgos morfológicos, fisiológicos y de crecimiento. La identificación de estos rasgos en especies de gramíneas nativas permite identificar germoplasma con características particulares de ...

Plant Ecology, 2004

Cover data for 93 perennial plant species from fifty 1 ha sites, were used to ordinate desert veg... more Cover data for 93 perennial plant species from fifty 1 ha sites, were used to ordinate desert vegetation in relation to 50 environmental variables at El Huizache Corridor. Cumulative variance recovered in the Bray and Curtis variance-regression ordination was substantial (80%). Community structure of desert plant communities at El Huizache Corridor may be influenced primarily by a combination of landscape and edaphic variables, which in turn may determine the distribution and abundance of moisture and nutrients, and perhaps promote habitat specialization and or competitive exclusion. Secondly, to a lesser extent, climate variables could be influencing community organization at small scale gradients, the longer the gradient the more relevant climatic factors become. First axis represented a landscape gradient; it was positively correlated to exposure, geology, slope angle, rocks, stoniness, iron, January mean temperature, and organic matter content; it was negatively correlated with latitude, longitude, soil depth, and potassium content. The second axis represented mainly a climatic gradient; it was positively correlated with mean precipitation of January, February, July, August, September, November, December, annual mean precipitation, Lang's Index, organic matter content, and stoniness. The third axis represented an edaphic gradient; it was positively correlated with electrical conductivity, Mn, Zn and elevation, and negatively correlated with pH, nitrates, Ca, and disturbance. These findings should guide conservation efforts to maintain species diversity and endemism at this area.

Rangeland Ecology & Management, 2007

We studied the influence of soil heterogeneity on plant community structure in a semiarid region ... more We studied the influence of soil heterogeneity on plant community structure in a semiarid region of Central Mexico using Bray-Curtis Ordination. The results showed that some edaphic factors, such as soil depth, organic matter, and potassium and calcium content, explained 80% of the total variation in structure of the studied communities. We found that soil resources were heterogeneously distributed in the study area, indicating that the edaphic variables considered in this study explain the existing plant community variability, moreover the presence of some shrubs as Krameria cytisoides influences the soil properties, suggesting that there is a reciprocal effect between plant and soil.

Acta Zoologica Mexicana (n.s.), Sep 1, 2008

Habitat use by the Coues white tailed deer (Odocoileus virginianus couesi) was documented during ... more Habitat use by the Coues white tailed deer (Odocoileus virginianus couesi) was documented during the dry season of 2006, in the Sierra del Laurel, Aguascalientes, Mexico. Based on logistic regression analyses, the objective of this study was to determine which floristic-structural and topographical features influence the probability of habitat use by the Coues deer. Vegetation, slope, altitude and distance to water were significant (p < 0.01) in the probability of habitat use. The thresholds for slope, altitude and distance were estimated for a high probability of use p (y≥0.5) and varied due to vegetation type. Sites on subtropical vegetation with 50 trees of Ipomoea murucoides Roem. & Schult by hectare and 350 shrubs of Eysenhardtia polystachya Ortega Sarg., and mean height of the shrub layer over the 2.0 meters, had a probability of use greater than 50 percent. However this vegetation type is scarce and threatened by agricultural development in the Sierra del Laurel. The results of this research clearly point out the need to promote management and conservation strategies of this type of vegetation since it is the preferred habitat of the Coues deer, which in turn should be considered as an asset by the state holders and an option to derive additional income from hunting fees and other economic activities pertaining to a multiple use of the land.

Acta Zoológica Mexicana (n.s.), May 1, 2007

The use of dams by the Mexican duck (Anas diazi Ridway, 1886) was documented between September 19... more The use of dams by the Mexican duck (Anas diazi Ridway, 1886) was documented between September 1994 and March 1995, in the region of El Llano, located in Mexico between Aguascalientes and Jalisco. The objective of this study was to determine which type of dam is more frequently used by this species, based on a use-availability water analyses. The results point out a superior use than expected of the reservoirs used as water storage which are pumped for irrigation, throughout fall and part of winter. These dams can be vital for the breeding of ducklings in Mexico. The identification and evaluation of the dams which are more frequently used by the Mexican duck will allow developing strategies for their conservation and sustainable use.

Prosopis laevigata and Mimosa biuncifera are frequently found in arid and semiarid shrublands, bu... more Prosopis laevigata and Mimosa biuncifera are frequently found in arid and semiarid shrublands, but scarce information is available about their influence on plant community structure and soil fertility. We compared plant community structure, diversity and soil nutrients of three semiarid shrubland sites located in Mezquital Valley, Mexico. These sites differ in their dominant species: Site 1 (Bingu) P. laevigata, Site 2 (González) M. biuncifera, and Site 3 (Rincón) with the presence of both legumes. The results showed that the plant community with P. laevigata and M. biuncifera (Site 3) had more cover, taller plants and higher plant diversity than sites with only one legume (Site 1 and Site 2). Soil organic matter (SOM), soil organic carbon (SOC), total nitrogen (TN), phosphorus-Olsen (P) and C mineralization were higher in the soil under the canopy of both legumes than in bare soil. In contrast, soil cation concentrations were lower under the canopy of P. laevigata, but not for M. biuncifera. In addition, the density of arbuscular mycorrhizal fungi spores was higher within the soil under the canopy of M. biuncifera than in the soil under the canopy of P. laevigata. Thus, resource islands (RI) created by P. laevigata increased the amounts of SOC, TN and P when compared with the RI of M. biuncifera. This study provided evidences about the importance of species identity in order to expand the niche availability for the establishment of other plants, and highlights that P. laevigata and M. biuncifera jointly influencing plant colonization within semiarid ecosystems

Se estudió el proceso germinativo de tres especies de Cephalocereus (C. apicicephalium, C. nizand... more Se estudió el proceso germinativo de tres especies de Cephalocereus (C. apicicephalium, C. nizandensis, C. totolapensis) endémicas del Itsmo de Tehuantepec, Oaxaca, México, bajo las hipótesis de que las semillas perderán la capacidad germinativa a medida que pasen los días después de la recolección y que la germinación es diferente entre especies, pero no entre poblaciones de la misma especie. Para cada una de las especies estudiadas, se recolectaron semillas de poblaciones diferentes y se sembraron en cuatro fechas distintas, colocando 30 semillas en dos o tres cajas de Petri. Las cajas se colocaron en una cámara de ambiente controlado y la germinación se registró diariamente durante 30 días, considerando una semilla germinada cuando emergía la radícula. Los porcentajes de germinación (38.8% en C. totolapensis, 55.1% en C. apicicephalium) y la velocidad de germinación (1.6 en C. apicicephalium, Guiengola-2 a 24 en C. apicicephalium, Guiengola-1 y C. nizandensis, La Mata) fueron sig...

Fagus grandifolia subsp. mexicana is a species restricted to small populations under high anthrop... more Fagus grandifolia subsp. mexicana is a species restricted to small populations under high anthropogenic pressure. With the aim to attain information to propose conservation strategies of this species, the seed rain and demography of current-year seedlings were analyzed at La Mojonera, Hidalgo, Mexico. A 4 800 m 2 plot divided into 10 X 10 m quadrants was established. The seed

Canada, the United States and Mexico all have a Ion history of rangeland monitoring. However none... more Canada, the United States and Mexico all have a Ion history of rangeland monitoring. However none have developed a nationwi ? e database or even a standardized set of protocols. The lack of standardization, inadequately developed relationships between management objectives and monitoring protocols, and an emphasis on data collection rather than analysis and interpretation have limited the value of past

Natural regeneration of eight species of trees in three different types of gaps caused by selecti... more Natural regeneration of eight species of trees in three different types of gaps caused by selective logging of mahogany in a rainforest of Quintana Roo, Mexico, was studied. Point centered quarter method was applied randomly in each of the 10 replications per site. Height and density of the seedling

Crecimiento de tres especies arbóreas en una selva mediana subcaducifolia de Nayarit

Jiménez GRG, García ME, Peña OB. Téc Pecu Méx 2001;39(2)153-161. Esta investigación se realizó co... more Jiménez GRG, García ME, Peña OB. Téc Pecu Méx 2001;39(2)153-161. Esta investigación se realizó con la finalidad de estimar la producción de forraje del teocintle perenne (Zea diploperennis Iltis, Doebley y Guzmán), bajo diferentes fechas de corte, en condiciones naturales. Se seleccionaron 30 parcelas experimentales de 1 m 2 , en la Estación Científica "Las Joyas" de la Reserva de la Biosfera Sierra de Manantlán, Jalisco-Colima, México. Se evaluaron 6 fechas de corte que corresponden a las etapas fisiológicas, con 5 repeticiones bajo un diseño completamente al azar. Las variables estimadas fueron el rendimiento anual de forraje del teocintle perenne y otras especies, producción de vástagos y la calidad del mismo. El corte al final de la reproducción (octubre 17) presentó el rendimiento más alto con 7.5 t ha -1 de materia seca de teocintle perenne y 0.9 t ha -1 para especies acompañantes. Entre tratamientos el número de vástagos fue similar ( P>0.05). El contenido de proteína cruda del forraje cosechado durante la época de latencia (mayo 17) fue de 20.6%, disminuyendo hasta el 5.7% para el corte al final de la época de madurez (noviembre 17). Se concluye que el teocintle perenne presenta una alta producción de forraje durante los cortes realizados en las etapas fenológicas más avanzadas, y su calidad sigue un patrón inverso a la producción de forraje. El teocintle perenne es una fuente viable de forraje para la producción de ganado y se recomienda continuar investigando su potencial forrajero en condiciones naturales e intensivas de manejo. PALABRAS CLAVE: Teocintle perenne, Zea diploperennis, Producción de forraje in situ, Fechas de corte, Vástagos, Calidad de forraje.