Articulos, Pre-prints (Facultad de Ciencias): Envíos recientes
Now showing items 41-60 of 488
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Giant cowbird (Molothrus orizivora) as broodparasite of the green jay (Cyanocorax yncas) in the Venezuelan Andes
(Ornitología Neotropical 20: 305-309, Venezuela, 2009) -
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 ... -
Using cover measurements to estimate aboveground understorey biomass in Maritime pine stands
(Annals of Forest Science 66(3): 1-11, Francia, 2009-01)• Understorey plays a major role in forest fluxes and stocks balances, however this compartment is generally poorly quantified. Our objectives were to establish models to estimate understorey biomass using vegetation cover ... -
Entre Nieblas: mitos, leyendas e historias del páramo
(Ecuador, 2009-02) -
Uso de la tierra y conservación de la diversidad en el páramo venezolano: diseño participativo de planes locales de manejo en áreas protegidas
(Memorias del II Congreso Latinoamericano de Parques Nacionales y otras Áreas Protegidas. DVD, Bariloche, UICN-SUR. 12 p., Venezuela, 2009)Los ecosistemas tropicales montanos por encima de los bosques continuos son conocidos como páramos y son los más diversos de las altas montañas del mundo.En Venezuela, se encuentran en la Cordillera de Mérida, formando un ... -
Ecosistemas de Los Andes del Norte y Centro. Bolivia, Colombia, Ecuador, Perú y Venezuela.
(Secretaría General de la Comunidad Andina, Programa Regional ECOBONA-Intercooperation, CONDESAN-Proyecto Páramo Andino, Programa BioAndes, EcoCiencia, NatureServe, IAvH, LTA-UNALM, ICAE-ULA, CDC-UNALM, RUMBOL SRL. Lima. pp.7-9, Perú, 2009)Los Andes del Norte y Centro o Andes Tropicales cubren una extensión de 1´542.644 Km desde el Oeste de Venezuela hasta la frontera entre Bolivia, Chile y Argentina. Considerados como la región de mayor riqueza y diversidad ... -
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) -
Interception of water by pastures of Pennisetum clandestinum Hochst. ex Chiov. and Melinis minutiflora Beauv
(Agricultural and Forest Meteorology 149: 1616-1620, Venezuela, 2009-10)The conversion of montane cloud forests into pastures for grazing cattle is the main cause of important impacts on rivers and streams in most of the Andes. In order to evaluate the effects of vegetation changes we need to ... -
Sensitivity of soil restoration indicators during paramo succession in the high tropical Andes: chronosequence and permanent plot approaches
(Restoration Ecology 17(5): 619-628, Venezuela, 2009-09)The aim of this study was to analyze indicators of soil restoration during secondary succession in a heterogeneous valley in the high tropical Andes. A combination of chronosequence and permanent plot methods was used to ... -
Modeling organic transformations by microorganisms of soils in six contrasting ecosystems: Validation of the MOMOS model
(Global Biogeochemical Cycles 24, GB1008,doi:10.1029/2009GB003527, Venezuela, 2010-02-26)The Modeling Organic Transformations by Microorganisms of Soils (MOMOS) model simulates the growth, respiration, and mortality of soil microorganisms as main drivers of the mineralization and humification processes of ... -
Características físicas y ambientales del Ramal de Calderas
(Rial, A., Señaris, J., Lasso, C. Flores, A. (Eds). Evaluación rápida de la biodiversidad y aspectos socioecosistémicos del ramal de Calderas, Andes de Venezuela. Capítulo 1. RAP Bulletin of Biological Assessment 56. Conservation International, Arlington, VA. USA. pp. 45-49, Estados Unidos, 2010)El Ramal de Calderas está ubicado en la porción nororiental de la cordillera de Mérida, sobre su vertiente llanera, en el Estado Barinas, Andes de Venezuela. Esta región está formada por una sucesión de afloramientos ... -
Spatial heterogeneity, land use and conservation in the cerrado region of Brazil
(2006)Aim This paper presents a spatial classification of the environmental and ecological diversity of the cerrado region of Brazil, as well as an appraisal of the levels of conversion to agriculture and of the extent of land ... -
Grazing impact on vegetation structure and plant species richness in an old-field succession of the venezuelan Páramos
(Spehn, E., Liberman, M., Körner, C. (Eds)., Estados Unidos, 2006) -
O caso das savanas tropicais da América do Sul: quando a sustentabilidade econômica e ecológica não é suficiente
(2006)O caso das savanas tropicais da América do Sul ilustra as complexas interrelações entre as características ecológicas dos ecossistemas terrestres naturais e os seus usos. As savanas tropicais estão determinadas por um ... -
Nitrogen and phosphorus as limiting factors for growth and primary production in a flooded savanna in the Venezuelan Llanos
(2006)The effects of N, P, NP and NPKS application on plant growth, above-ground primary production and N and P accumulation in the above-ground biomass of a flooded savanna were assessed over two growth cycles. Application ... -
Carbon sequestration potencial of the Neotropical savannas of Colombia and Venezuela
(Lal, R., Cerri, C., Bernoux, M., Etchevers, J., Cerri, E. (Eds)., Estados Unidos, 2006) -
Dinámica sucesional de la vegetación en un sistema agrícola con descanso largo en el Altiplano central boliviano
(2006)Se estudió la dinámica sucesional de la vegetación en parcelas en descanso agrícola en el Altiplano central boliviano, donde se practica una agricultura con descansos largos en sectores manejados comunalmente. El objetivo ... -
Agricultural development and biodiversity conservation in the Páramo environments of the Andes of Mérida, Venezuela
(Spehn, E., Liberman, M., Körner, C. (Eds), Estados Unidos, 2006) -
Vegetation and grazing patterns in Andean environments: A comparison of pastoral systems in punas and páramos
(Spehn, E., Liberman, M., Körner, C. (Eds)., Estados Unidos, 2006-11-11)