Martínez-Vazquez, M; Bueno, JL; Espinosa, G; Calderon, JS; García, A(1998)
From the aerial parts of Machaeranthera tanacetifolia the known 12-hydroxy-ent-kauren-16-en-19-oic acid and the two previously unknown (-)-11-O-alpha-D-arabinopyranosyl-beta-eudesmol and (+)-11-O-beta-L-arabinopyranosyl- ...
Two new species of Paraxenylla are described and illustrated, Paraxenylla cubana sp. nov. from Cuba and Paraxenylla peruensis sp. nov. from Peru. The species Paraxenylla mangle ( Murphy, 1965) stat. nov., comb. nov. is ...
Description of two new oribatid species: Eremella matildebellae sp. n. and Micreremus rafaelius sp. n, from Mexico are described. With 6 original figures.
Two new species of Americanura, one from Chiapas, Mexico, and another from Izabal, Guatemala, are described and illustrated. A key for the 15 species known of the genus is given.
Two new species of Choreutinula Paclt 1944 are described and illustrated. One American, from North Dakota, which differs front other species by the presence of 4+4 setae on ventral tube and small setae p3 on Abd. V. The ...
Ricinuleids are one of the least investigated groups of Arachnida. In particular, knowledge of their ultrastructure is poor. Observations of the distal tarsomeres of ricinuleids show differences in their shape and equipment ...
Peña-Becerril, JC; Monroy-Ata, A; Álvarez-Sánchez, Francisco Javier; Orozco-Almanza, MS(2005)
La fragmentación de hábitats debida a la deforestación origina profundos cambios en los procesos ecológicos; uno de estos cambios es el efecto de borde, el cual consiste en la generación de microclimas variables y de ...
Frías-Alvarez, P; Zúñiga-Vega, José Jaime; Parra-Olea, G(2010)
Amphibians are greatly affected by diversity loss and recent declines in amphibian populations are well documented. One of the proposed causes of such declines, UV-B radiation, has been reported to induce lethal and ...
Amphibians are greatly affected by diversity loss and recent declines in amphibian populations are well documented. One of the proposed causes of such declines, UV-B radiation, has been reported to induce lethal and ...
El objetivo del trabajo fue evaluar la variabilidad morfológica y el crecimiento corporal de 4 poblaciones del cocodrilo de pantano (Crocodylus moreletii) que se encuentran en la Unidad de Manejo para la Conservación de ...
Seasonal and environmentally induced variation in the type and frequency of leaf trichomes of Wigandia urens (Ruiz & Pavon) Kunth (Hydrophyllaceae) was studied. Depending on the microsite, W. urens plants had smooth leaves ...
Zamora-Abrego, JG; Zúñiga-Vega, José Jaime; Nieto-Montes de Oca, A(2007)
We document variation among 13 populations of distinct species of the lizard genus Xenosaurus in four key reproductive traits: minimum size at maturity, litter size, size at birth, and relative clutch mass (RCM). Despite ...
We document variation among 13 populations of distinct species of the lizard genus Xenosaurus in four key reproductive traits: minimum size at maturity, litter size, size at birth, and relative clutch mass (RCM). Despite ...
1 Gaps in the forest canopy allow establishment of many understorey species. As gaps close, their: demographic behaviour is affected by changing environmental conditions. A demographic analysis of Primula vulgaris populations ...
To understand the population dynamics of a species, it is necessary to document the way in which its demographic behaviour varies through space and time. Anthropogenic disturbance, such as shifting cultivation, is an ...
Pulido, MT; Valverde-Valdés, María Teresa; Caballero, J(2007)
To understand the population dynamics of a species, it is necessary to document the way in which its demographic behaviour varies through space and time. Anthropogenic disturbance, such as shifting cultivation, is an ...
Several studies have proposed a group of morpho-functional traits as determinants of the ecological strategy of species. Among these, four morpho-functional traits are considered to be relevant in determining a plant's ...