Browsing Unidades de Investigación de la Facultad de Ciencias by Title
Now showing items 817-836 of 1111
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Land-use change and biodiversity conservation in the Venezuelan Páramo: integrating farmer’s perspectives
(Mountain Forum Bulletin 7(1): 15-17, Venezuela, 2007-01) -
Latitudinal and altitudinal patterns of plant community diversity on mountain summits across the tropical Andes.
(Ecography 40: DOI: 10.1111/ecog.02567, 2016-11-04)The high tropical Andes host one of the richest alpine floras of the world, with exceptionally high levels of endemism and turnover rates. Yet, little is known about the patterns and processes that structure altitudinal ... -
Leaf gas exchange in canopy species of a Venezuelan cloud forest
(Biotropica 41(6): 659-664, Venezuela, 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 ... -
Leaf spectra and weight of species in canopy, sub-canopy, and understory layers in a Venezuelan Andean cloud forest
(Scientifica, Article ID 839584, 14 pages http://dx.doi.org/10.6064/2012/839584, Venezuela, 2012-04-22)We characterize the leaf spectra of tree species of an Andean cloud forest in Venezuela, grouped according to position in canopy, subcanopy and understory. We measured leaf reflectance and transmittance spectra in the ... -
Leaf-cutting ants and forest groves in a tropical parkland savanna of Venezuela: facilitated succession?
(SABER ULA, 2005-01-26)Leaf-cutting ants and forest groves in a tropical parkland savanna of Venezuela: facilitated succession? (Farji Brener, Alejandro G. and Silva, Juan F.) Abstract Some savanna arcas in the Orinoco Llanos region in ... -
Lie Groups of Conformal Motions acting on Null Orbits
(SABER ULA, 2008-07-02)Lie Groups of Conformal Motions acting on Null Orbits (Carot, Jaume; Coley, A. A.; Sintes, A. M.) Abstract Space-times admitting a 3-dimensional Lie group of conformal motions acting on null orbits containing a ... -
Life forms and phenology
(1983) -
Light-front dynamics of massive vector Chern-Simons gravity
(SABER ULA, 2005-01-06)Light-front dynamics of massive vector Chern-Simons gravity (Khoudeir, Adel; Aragone, Carlos; Arias, Pío José) Abstract We present a second order gravity action which consists of ordinary Einstein action augmented ... -
Locality and electromagnetic momentum in critical tests of special relativity.
(SABER ULA, 2007-04-13)Locality and electromagnetic momentum in critical tests of special relativity. Spavieri, Gianfranco; Quintero, Jesús; Sánchez, Arturo; Ayazo, José y Gillies, George Abstract In this review of recent tests of special ... -
Localizing gravity on exotic thick 3-branes
(SABER ULA, 2007-03-19)Localizing gravity on exotic thick 3-branes Castillo-Felisola, Oscar; Melfo, Alejandra; Pantoja, Nelson; Ramírez, Alba Abstract We consider localization of gravity on thick branes with a ... -
Low temperature resistance in saplings and ramets of Polylepis sericea in the Venezuelan Andes
(Acta Oecologica 35(5): 610–613, Países Bajos, 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 ... -
Mapa de ecosistemas de Los Andes del norte y Centrales. Bolivia, Colombia, Ecuador, Perú y Venezuela
(Secretaría General de la comunidad Andina, Programa Regional ECOBONA, CONDESAN-Proyecto Páramo Andino, Programa BioAndes, EcoCiencia, NatureServe, LTA-UNALM, IAvH, ICAE-ULA, CDC-UNALM, RUMBOL SRL. Lima. www.infoandina.org/ecosistemasandinos, Perú, 2009)