Repositorio Institucional de INECOL (Instituto de Ecología)
Not a member yet
764 research outputs found
Sort by
Simsia bicentenarialis (Compositae-Heliantheae) una especie nueva del centro de México
Get PDFSe describe como nueva y se ilustra Simsia bicentenarialis del noreste y centro de Querétaro y noreste de Guanajuato. La planta presenta semejanzas con algunas variedades de S. foetida (Cav.) S. F. Blake
CUATRO NUEVAS ESPECIES DE VERBESINA (COMPOSITAE: HELIANTHEAE) DEL CENTRO DE MÉXICO
Get PDFCon base en colecciones realizadas en los estados mexicanos de Guanajuato, Querétaro y San Luis Potosí, se describen como especies nuevas y se ilustran Verbesina abietifolia, V. carranzae, V. steinmannii y V. suberosa
CAMBIOS DE RANGO TAXONÓMICO Y NUEVAS COMBINACIONES NOMENCLATURALES EN TRES COMPUESTAS MEXICANAS
Get PDFSe proponen tres nuevas combinaciones nomenclaturales en compuestas mexicanas, consideradas como necesarias para ajustar el rango taxonómico de: Acourtia dugesii (A. Gray) Reveal & R. M. King var. veracruzana (B. L. Turner) Villarreal & A. E. Estrada, Acourtia dugesii (A. Gray) Reveal & R. M. King var. queretarana (B. L. Turner) Villarreal & A. E. Estrada y Chaptalia lyratifolia Burkart var. estribensis (G. L. Nesom) Villarreal & A. E. Estrada
REPORTE DE UNA POBLACIÓN SILVESTRE DE SEDUM MORGANIANUM E. WALTHER (CRASSULACEAE)
Get PDFSe reporta el hallazgo de Sedum morganianum E. Walther (cola de borrego) en su estado silvestre. Esta especie fue descrita y nombrada a partir de material cultivado y a más de 70 años de su publicación, no se conocían plantas de origen silvestre. Se encontró en dos barrancas del municipio de Tenampa, en el centro de Veracruz, en el oriente de México, donde crece sobre paredes verticales de arenisca con bosque tropical caducifolio. Por su distribución conocida se piensa que se trata de un endemismo estrecho
Removal Rates of Native and Exotic Dung by dung Beetles (Scarabaeidae: Scarabaeinae) in a Fragmented Tropical Rain Forest
Get PDFMany studies have evaluated the effect of forest fragmentation on dung beetle assem- blage structure. However, few have analyzed how forest fragmentation affects the processes carried out by these insects in tropical forests where their food sources consist mainly of dung produced by native herbivore mammals. With the conversion of forests to pastures, cattle dung has become an exotic alternative and abundant food for dung beetles. This study compares dung removal rates of native (monkey) and exotic (cow) dung in different-sized fragments of tropical rain forests, during the dry and rainy seasons at the Los Tuxtlas Biosphere Reserve. Dung removal rates were affected by season, dung type, and the interaction between resource type and season. During the dry season, the removal rates of monkey dung were somewhat similar than during the rainy season, whereas the removal rates of cow dung were much higher during the rainy season. Dung beetle biomass and species richness were almost three times greater in monkey dung than in cow dung. Monkey dung attracted species belonging to the dweller, roller, and tunneler guilds; cow dung attracted mostly tunnelers. Therefore, the use of exotic dung may result in a biased misconception of the rates of dung removal in tropical forest and an underestimation of dung beetle diversity. This study highlights the importance of working with natural tropical forest resources when attempting to identify realistic tendencies concerning processes in natural habitats and those modiÞed by fragmentation and by other human activities
Una especie nueva de Perymenium (Compositae-Heliantheae) del Estado de México (México)
Get PDFSe describe como nuevo e ilustra a Perymenium rogmacvaughii con base en un ejemplar colectado en el extremo occidental del Estado de México. La especie está posiblemente relacionada con P. hintonii McVaugh, conocido de Michoacán, y con P. pringlei B.L. Rob. & Greenm. var pringlei, registrado de Jalisco y Sinaloa
In memoriam Paul S. Martin: Incansable luchador de la ciencia y protección de la naturaleza (Agosto 22, 1928 ? Septiembre 13, 2010)
Get PDFPollination and nectar production of Psittacanthus schiedeanus (Loranthaceae) in central Veracruz, Mexico
Get PDFWe assessed nectar production patterns, the breeding system, and overall pollinator dependence of Psittacanthus schie- deanus (Schlecht. & Cham.) G.Don (Loranthaceae), a mistletoe species that blooms in the late summer of the eastern cloud forests of Mexico and whose owers are mainly visited by hummingbirds. Despite differences in nectar production rates over the lifespan of a ower, the daily nectar secretion of 3.6-7.2 mg sugar/ ower/day was high compared to other hummingbird-adapted plant spe- cies. Hand-pollination experiments showed that this plant is self-compatible, with only a slight advantage of cross- (xenogamous) and geitonogamous hand-pollinated owers over autonomous hand-pollinated owers. Hence, the high production of nectar by P. schiedeanus owers represents an important ecosystem resource that may mediate interactions with a wide variety of oral visitors. Although P. schiedeanus set selfed fruits autonomously, this plant requires hummingbirds to achieve its full reproductive potential
REENCUENTRO CON HECHTIA EPIGYNA HARMS (BROMELIACEAE)
Get PDFSe reporta el hallazgo de Hechtia epigyna Harms en el estado de Hidalgo, México. La especie se tenía registrada previamente sólo de Tamaulipas. Se proporciona una descripción completa de la planta y fotografías de los individuos femeninos y masculinos del taxon, así como un mapa de distribución del mismo