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Semilla, actores e incertidumbres en la producción papera de Los Andes de Mérida. Realidades y escenarios bajo el contexto político vigente.
(SABER ULA, 2005-11-14)El presente trabajo presenta una visión de síntesis sobre los actores sociales involucrados en la problemática de la producción-importación de la semilla de papa. Se argumenta que estos actores institucionales y sociales ... -
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 ... -
Shrubs as foundation species in a high tropical alpine ecosystem: a multi-scale analysis of plant spatial interactions
(Plant Ecology and Diversity, 2014-09)Background: Studies on plant–plant interactions in alpine ecosystems show a strong bias for temperate vs. tropical latitudes and pay limited attention to the implications of biophysical heterogeneity beyond the local plant ... -
Sistema de clasificación ecológico y mapas de ecosistemas: Enfoque conceptual-metodológico para Venezuela.
(Venezuela, 2013-01)El objetivo de este trabajo es presentar una propuesta metodológica de clasificación de la cobertura de la tierra bajo un enfoque ecológico que se estructura en tres niveles o escalas espaciales: las ecorregiones, los ... -
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 ... -
Spatial relations and population structure of a dominant tree along a treeline ecotone in the Tropical Andes: interactions at gradient and plant-neighbourhood scales
(Plant Ecology and Diversity 6(3-4): 343-353, Venezuela, 2013)Background: Studies in temperate mountains suggest that plant-plant interactions modulate tree establishment above the forest line. In tropical mountains worldwide this issue remains largely unexplored. Aims: To analyse ... -
The context-dependence of beneficiary feedback effects in plant facilitations
(New Phytologist: DOI: 10.1111/nph.12908, 2014-05-20)Facilitative effects of some species on others are a major driver of biodiversity. These positive effects of a benefactor on its beneficiary can result in negative feedback effects of the beneficiary on the benefactor and ... -
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 ... -
Tierras llaneras de Venezuela...tierras de buena esperanza
(Venezuela, 2015) -
Transformación del paisaje de selvas de montaña en la cuenca del río Capaz, Andes Venezolanos
(Venezuela, 2009-12-31)La deforestación de selvas tropicales de montaña es una de las principales causas de la pérdida de la biodiversidad de nuestro planeta. Entre 1981 y 1990 Venezuela presentó las mayores tasas de deforestación de ... -
Use of general circulation model outputt in the creation of climate change scenarios for impact analysis.
(Venezuela, 1993)Many scientific studies warn of a rapid global climate change during the next century. These changes are understood with much less certainty on a regional scale than on a global scale, but effects on ecosystems and society ... -
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 ... -
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 ...