Articulos, Pre-prints (Instituto de Ciencias Ambientales y Ecológicas (ICAE)): Envíos recientes
Mostrando ítems 81-100 de 236
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Ecología, hidrología y suelos del páramo
(Programa de Capacitación Técnica. Proyecto Páramo Andino-CONDESAN, Quito. 272 pp., Venezuela, 2012-08) -
Community impacts of Prosopis juliflora Iivasion: biogeographic and congeneric comparisons
(Plos ONE 7(9):e44966. 1-13, Venezuela, 2012-09-12)We coordinated biogeographical comparisons of the impacts of an exotic invasive tree in its native and non-native ranges with a congeneric comparison in the non-native range. Prosopis juliflora is taxonomically complicated ... -
Gas exchange in sweet pepper (Capsicum chinense Jacq) under different light conditions
(Journal of Agricultural Science, 3 (3):134-142, Venezuela, 2011-09)Plants in the tropics are exposed to high radiation and consequently high temperature and evaporative demands throughout the year. Under these conditions, physiological processes and final yield may negatively affect ... -
Seasonal gas exchange and water relations in juveniles of two evergreen neotropical savanna tree species with contrasting regeneration strategies
(Trees 25(3): 473-483, Venezuela, 2011)Colonization dynamics of woody species into grasslands in Neotropical savannas are determined by two main factors: plant-available moisture and fire. Considering seasonality of precipitation and high fire frequency in these ... -
Regeneración del páramo después de un disturbio agrícola: una síntesis de dos décadas de investigaciones en sistemas con descansos largos de la Cordillera de Mérida
(Herrera, F., Herrera, I. (Eds): La restauración ecológica en Venezuela. Fundamentos y experiencias. Ediciones IVIC. Altos de Pipe, Venezuela. pp. 123-145, Venezuela, 2011)El análisis de los patrones y mecanismos involucrados en la recuperación de los ecosistemas durante la sucesión constituye sin duda el aporte más importante de la ecología al desarrollo de fundamentos teóricos para el ... -
Seasonal variations in leaf gas exchange of platain cv. Hartón (Musa AAB) under different soil water conditions in a himid tropical region
(2005)The seasonal effect of soil water availability on leaf gas exchange of plantain plants cv. Hartón growing on two different texture soils (loamy and clayey) were evaluated. Soil water deficits corresponded to 48, 24 and 4 ... -
Variaciones microclimáticas en invernadero: efecto sobre las relaciones hídricas e intercambio de gases en pimentón (Capsicum annuum)
(2005)En este estudio se compararon los efectos de días despejados con altas radiaciones (1700 mmol m-2 s-1) y días nublados (por debajo de 1000 µmol m-2 s-1) sobre el microclima en invernaderos y las relaciones hídricas e ... -
Determination of water-soluble and total extractable polyphenolics in biomass, necromass and decomposing plant material using near-infrared reflectance spectroscopy (NIRS)
(2005)Near infrared reflectance spectroscopy (NIRS) was used to predict the water-soluble and total extractable polyphenolics of plant material. Different life forms (forbs, grasses, shrubs, giant rosettes), organs (leaves, ... -
Anatomía Foliar de Polylepis sericea Wedd. (Rosaceae) a dos altitudes en los altos andes venezolanos
(2005)Se estudió la anatomía foliar de individuos de Polylepis sericea (Rosaceae) a dos altitudes contrastantes, cercanas a los extremos de su distribución en Venezuela, en la Estación del teleférico de Loma Redonda a 4.100 m ... -
Avian nectar robbers of Passiflora mixta (Pasifloraceae): Do they have a positive effect on the plant?
(Interciencia 36(8): 587-592, Venezuela, 2011-08-05)The effect of nectar robbing on plant reproduction may be negative, positive or neutral. The effect was evaluated on Passiflora mixta, an Andean high-mountain species that is pollinated by the Sword-billed Hummingbird ... -
Physical geography and ecosystems in the tropical Andes
(Herzog, S., Martínez, R., Jørgensen, P. and Tiessen, H. (Eds): Climate Change and biodiversity in the tropical Andes.Capitulo 10. Macarthur Foundation, inter american iInstitute, Scope. Colombia. pp. 152-169, Colombia, 2011) -
Respuesta del cultivo de papa a la combinación de diferentes fuentes de fertilización nitrogenada: evaluando la hipótesis de la sincronización
(Bioagro 24(2): 83-92, Venezuela, 2012-05-21) -
El fuego y los árboles de las sabanas
(Medina E, Huber O, Nassar JM & Navarro (Eds). Recorriendo el paisaje vegetal de Venezuela. Ediciones IVIC., 2013) -
Water relations and gas exchange in Coespeletia moritziana (Sch. Bip) Cuatrec., a giant rosette species of the high tropical Andes
(Photosynthetica 50: 429-436, Venezuela, 2012-04-26)Giant rosettes are ones of the most striking features of the vegetation in the high tropical Andes, with Coespeletia moritziana reaching the highest altitudes up to 4,600 m a.s.l. Different from other giant rosettes, this ... -
Assessing and modeling the role of the native legume Lupinus meridanus in fertility restoration in a heterogeneous mountain environment of the tropical Andes
(Agriculture, Ecosystems and Environment 159 (2012) 29-39, 2012)The role of the native legume Lupinus meridanus on fertility restoration in long fallow agriculture of the Venezuelan Andes was analyzed using field and laboratory data and a process-based model of succession (FAPROM). L. ... -
Freezing avoidance in tropical Andean bamboos
(LXth World bamboo Congress proceedings. Sección 2, Massachusetts, USA. pp. 247-257, Estados Unidos, 2012-04-15)Frost resistance was compared in five species of different life forms in the neotropical woody bamboo genus Chusquea growing along a cloud forest-paramo gradient, between 2250-4010 m a.s.l. in the Venezuelan Andes. C. ... -
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 ... -
Modelling competitive ability of neotropical savanna grasses: Simulation of shading and drought impacts on biomass production
(Ecological Informatis 13: 57-69, España, 2013)In this paper, we develop a technique to model the spatial distribution of shoots along vertical and horizontal dimensions of a plant community. We use it to simulate the growth of a tropical savanna near the city of ... -
Selvas y bosques nublados de Venezuela
(Medina, E., Huber, O., Nassar, J., Navarro, P. Recorriendo el paisaje vegetal en Venezuela. Ediciones IVIC, Instituto Venezolano de Investigaciones Científicas. Caracas, Venezuela. pp. 125-155, Venezuela, 2013) -
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 ...