Listar Articulos, Pre-prints (Instituto de Ciencias Ambientales y Ecológicas (ICAE)) por título
Mostrando ítems 135-154 de 236
-
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 ... -
Life forms and phenology
(1983) -
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) -
Mapeo de fincas y recolección de información agrícola a través de investigación participativa
(Venezuela, 2007-03)En este proyecto se puso a punto y se aplicó en dos localidades del Municipio Rangel en Los Andes merideños, una metodología participativa que podría ser una alternativa viable y de bajo costo para generar una base ... -
Mapping savanna ecosystems of the Llanos del Orinoco using multitemporal NOAA satellite imagery
(2004)Monthly composites NOAA-advanced very high resolution radiometer (AVHRR) normalized difference vegetation index (NDVI) images (June 1992–October 1993) were used to analyze the phenology of savanna ecosystems in the Llanos ... -
Un método participativo para el mapeo de fincas y la recolección de estadísticas agrícolas aplicable a varias escalas espaciales
(Interciencia 34(7): 479-486, Venezuela, 2009-07-28)Se diseñó y probó un método para el mapeo participativo de fincas y la recolección de información agrícola, en el cual los pobladores delimitan los linderos de sus fincas y realizan su sectorización interna directamente ... -
Micro-organismes et matiere organique du sol (modele MOMOS): bilan de 20 ans de modelisation basée sur le tracage isotopique in situ
(Etude et Gestion des Sols 16(2): 113-132, Francia, 2009)Outils prévisionnels de la durabilité des écosystèmes et du changement global, les modèles à compartiments permettent de prédire les flux échangés entre matières organiques d’origine végétale ou microbienne du sol ainsi ... -
Modeling microbial exchanges between forms of soil nitrogen in contrasting ecosystems
(Biogeosciences Discussions, 10(3): 5749-5780, Unión Europea, 2013-03-25)Although nitrogen (N) is often linked to carbon (C) in organic molecules, C is carried from the tmosphere to the soil through plants while N is carried from the soil to plants by microbial transformations. Many schemes ...