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Water relations and gas exchange in Coespeletia moritziana (Sch. Bip) Cuatrec., a giant rosette species of the high tropical Andes
(Photosynthetica 50: 429-436, 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 ...
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, 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 ...
Freezing avoidance in tropical Andean bamboos
(LXth World bamboo Congress proceedings. Sección 2, Massachusetts, USA. pp. 247-257, 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. ...
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. ...
Caracterización de comunidades leñosas estacionalmente secas pre montañas y montañas en el Estado Mérida
(2011-10-28)
En el cinturón neotropical existen dos grandes tipos de ecosistemas boscosos: los bosques húmedos o lluviosos (Guariguata y Kattan, 2002) y los secos tropicales (Bullock et al., 1995). De estos, los más estudiados son los ...
¿Se regenera bosque tropical seco en la Península de Guanahacabibes (Cuba)? Análisis del proceso de reconversión a través de la caracterización de las etapas sucesionales con un enfoque ecológico del paisaje.
(2011-10)
El bosque tropical seco (BTS) constituye el ecosistema que más ha
experimentado el proceso de conversión; entre 1950 y 1990 su extensión disminuyó un
14%, actualmente ocupa el 42% de la cobertura boscosa mundial. En la ...
Gas exchange in sweet pepper (Capsicum chinense Jacq) under different light conditions
(Journal of Agricultural Science, 3 (3):134-142, 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 ...
Avian nectar robbers of Passiflora mixta (Pasifloraceae): Do they have a positive effect on the plant?
(Interciencia 36(8): 587-592, 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 ...
Estructura morfoanatómica y resistencia al congelamiento en bambúes de páramo del género Chusquea (Bambusoideae: Poaceae)
(2011-05-05)
Chusquea (Bambusoideae: Poaceae) es un género neotrópical muy representativo, por su diversidad en especies y la elevada proporción de endemismos en los Andes del Norte. Este género se asocia típicamente bosques; no obstante, ...