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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, 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 ...
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, 2010-09-30)
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, 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 ...
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, 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 ...
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, 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 ...
Leaf gas exchange in canopy species of a Venezuelan cloud forest
(Biotropica 41(6): 659-664, 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 ...
Coupling soil water and shoot dynamics in three grass species: A spatial stochastic model on water competition in Neotropical savanna
(Ecological Modelling 220: 2734 - 2743, 2009-10-24)
Savannas are ecosystems known for their high environmental and economic value. They cover at least 20% of the global land surface and, in some cases, can act as a boundary between tropical rainforest and deserts.Water is ...
Low temperature resistance in saplings and ramets of Polylepis sericea in the Venezuelan Andes
(Acta Oecologica 35(5): 610–613, 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 ...
Interception of water by pastures of Pennisetum clandestinum Hochst. ex Chiov. and Melinis minutiflora Beauv
(Agricultural and Forest Meteorology 149: 1616-1620, 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, 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 ...