Articulos, Pre-prints (Facultad de Ciencias): Envíos recientes
Voici les éléments 61-80 de 488
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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. ... -
Functional diversity of wetland vegetation in the high-andean Páramo, Venezuela
(Spehn, E., Liberman, M., Körner, C. (Eds), Estados Unidos, 2006) -
Factors controlling decomposition of soil organic matter in fallow systems of the high tropical Andes: A field simulation approach using 14C- and 15N- labelled plant material
(2006)N-rich (C:N ¼ 27) and N-poor (C:N ¼ 130) wheat straw, labelled with 14C and 15N, was incubated for 2 yr in two major ecosystems of the upper elevation belt of cultivation in the high Andes: the moist Paramo (precipitation ... -
Cambios en la sabana de la estación biológica de Los Llanos Francisco Tamayo, Sociedad Venezolana de Ciencias Naturales, Calabozo, Venezuela
(Medina E, Hubber O, Nassar J, Navarro P. (Eds.). Recorriendo el Paisaje Vegetal de Venezuela. Ediciones IVIC, Caracas. Pp. 231-248., Venezuela, 2013) -
A characterization of the woody vegetation at the treeline in the Venezuelan Andes
(Global change and the World’s Mountains Perth Concert Hall – Horsecross Perth, Scotland, UK.p.p. 548-549, Reino Unido, 2010-09-30) -
The use of organic substrates with contrasting C/N ratio in the regulation of nitrogen use efficiency and lossesin a potato agroecosystem
(Nutrient Cycl Agroecosystems 88(3): 411–427, Venezuela, 2010-12-01)The effect of the application of organic amendments of contrasting C/N ratio, combined with mineral N fertilizer, on the N budget of a potato crop was evaluated. The hypothesis was that the combination of substrates of ... -
Actividades humanas que cambiaron el bosque en la Cordillera de Mérida: zona cafetalera-ganadera
(En Rial, A., Señaris, J., Lasso, C. Flores, A. (Eds). Evaluación rápida de la biodiversidad y aspectos socioecosistémicos del ramal de Calderas, Andes de Venezuela. RAP Bulletin of Biological Assessment 56. Conservation International, Arlington, VA. USA. pp. 112-119, Estados Unidos, 2010)La zona cafetalera-ganadera en Los Andes de Venezuela tiene su principal expresión en las vertientes húmedas de la cordillera de Mérida entre los 800 y 2000 m s.n.m. Los cultivos de café y los pastizales para ganadería ... -
Modelling the effects of fire and competition on the dynamics of neotropical savannas: from plants to community
(2005)Savannas are one of the most extensive biomes of the world and are subject to intense pressures due to large human populations using this ecosystem, even though it is characterized by low crop yields and poor nutritional ... -
Relaciones hídricas e intercambio de gases en Theobroma cacao var. Guasare bajo períodos de déficit hídrico
(2005)Se evaluó las relaciones hídricas y el intercambio de gases en Theobroma cacao var. Guasare bajo períodos de déficit hídrico. Se midieron las variables microclimáticas (temperatura del aire, humedad relativa y radiación ... -
Participatory planning for biodiversity conservation in the high tropical andes: are farmers interested?
(2005)The success of participatory conservation projects depends greatly on the interest shown by the local population and on the strategies used to incorporate all stakeholders from the initial stages. In the highly diverse ... -
Are cloud forest tree structure and environment related in the Venezuelan Andes?
(Austral Ecology 36, Issue 3: 280-289, Australia, 2011-05)Cloud forest vegetation structure and composition were studied in theVenezuelan Andes at three sites in Mérida State. Although the sites are within 10 to 30 km of each other, climatic, geologic and topographic differences ... -
Degradación de laderas durante el ciclo triguero en Los Andes venezolanos y factores que limitan su restauración
(Herrera, F., Herrera, I. (Eds): La restauración ecológica en Venezuela. Fundamentos y experiencias. Ediciones IVIC. Altos de Pipe, Venezuela. pp. 17-34, Venezuela, 2011)En los Andes venezolanos el trigo fue introducido poco tiempo después de la llegada de los españoles y continuó por casi 400 años, principalmente en los valles secos interandinos, entre los 2.000 y 3.600 m de altitud, ... -
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 ... -
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, ...