Buscar
Mostrando ítems 1-10 de 17
Leaf gas exchange in canopy species of a Venezuelan cloud forest
(Biotropica 41(6): 659-664, 2009-11)
Tropical cloud forests are considered humid ecosystems with frequent cloud cover down to the ground surface. However, seasonal variation in precipitation may induce
short-term water stress. For canopy leaves, this water ...
Low temperature resistance in saplings and ramets of Polylepis sericea in the Venezuelan Andes
(Acta Oecologica 35(5): 610–613, 2009-10)
The frequent occurrence of all year-round below zero temperatures in tropical high mountains constitutes a most stressful climatic factor that plants have to confront. Polylepis forests are found well above
the continuous ...
Comportamiento ecofisiológico de Brachiaria decumbens en monocultivo en asociación con Leucaena leucocephala
(Pastos y Forrajes 31(3): 217-227, 2008-09)
Con el objeto de estudiar las relaciones ecofisiológicas que determinan el crecimiento de B. decumbens en monocultivo (MO) y asociada a L. leucocephala (AS), se realizaron evaluaciones de radiación fotosintéticamente activa ...
How do two Lupinus species respond to temperature along an altitudinal gradient in the Venezuelan Andes?
(Revista Chilena de Historia Natural 81: 335-343, 2008)
Temperature determines plant formations and species distribution along altitudinal gradients. Plants in the tropical high Andes, through different physiological and morphological characteristics, respond to freezing night ...
Functional characterisitcs of the arborescent genus Polylepis along a latitudinal gradient in the high Andes
(Interciencia 32(10): 663-668, 2007-09)
Polylepis is a genus restricted to the Andean Mountain Range, naturally occurring above the upper continuous forest limit. The purpose of this work was to integrate and compare
functional characteristics in terms of water ...
Estudio morfoanatómico de dos orquídeas de una selva nublada tropical
(Interciencia 32: 410-418, 2007-05)
Se describen por primera vez la estructura morfo-anatómica y estrategias hídricas de dos orquídeas de las selvas nubladas andinas de Venezuela, Maxillaria miniata y Pleurothallis cardiantha. El estudio se efectuó en una ...
Distribution of grasses along an altitudinal gradient in a Venezuelan paramo.
(SABER ULA, 2006-12-07)
Distribution of grasses along an altitudinal gradient in a Venezuelan paramo
(Márquez, Edjuly J., Fariñas G, Mario R., Briceño Benito E. y Rada R., Fermin J.)
Abstract
In Venezuelan paramos grasses, after Asteraceae, ...
Freezing tolerance in grasses along an altitudinal gradient in the Venezuelan Andes
(SABER ULA, 2006-12-07)
Freezing tolerance in grasses along an altitudinal gradient in the Venezuelan Andes
(Márquez, Edjuly J., Rada, Fermín y Fariñas, Mario)
Abstract
The tropical high Andes experience greater daily temperature oscillations ...
Flowering and fruit production dynamics of sweet pepper (Capsicum chinense Jacq) under different shade conditions in a humid tropical region
(2006)
Growing sweet pepper (C. chinense) under shade has increased in the region south of Lake Maracaibo in Venezuela. We studied the effects of different shade conditions on the dynamics of flowering and fruit production of C. ...
Dinámica hídrica de un pastizal de Pennisetum clandestinum Hochst ex Chiov
(Ataroff, M. y J.F. Silva (eds) 2005. Dinámica Hídrica en Sistemas Neotropicales. ICAE, Universidad de Los Andes, Mérida, Venezuela, 2005)
La introducción de pastizales en sistemas naturales implica cambios en el funcionamiento hidrológico dependientes de
la configuración espacial de la especie, la topografía y el clima que la rodea. En este trabajo, se realizó ...