Tropical Ecology and Conservation [Monteverde Institute]

Alternative Title

Variación en la precipitación y sus efectos sobre el éxito reproductivo y la supervivencia de Lepanthes jimenezii (Orchidaceae)



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Publication Date

May 2007


Tropical cloud forests like that found in Monteverde, Costa Rica rely heavily on daily precipitation in the form of mist during the misty-windy and dry seasons. Studies have shown that this mist is occurring less frequently due to climate change (Pounds et al. 1999). This field study examines the effects of increased precipitation frequency, to mimic that found in the 1970s, on a specific member of the Orchidaceae family, Lepanthes jimenezii (Pounds et al. 1999). Additionally it compares such effects with those that L. jimenezii experiences in current conditions and those that may occur in the future. I divided a group of 83 orchids into three different sample groups. The first was exposed to ambient (and contemporary) conditions, the second to supplemented mist (1970s conditions) and the third to conditions that decreased the frequency of current precipitation (potential future conditions), although not volume. An ANCOVA test of covariance determined that average leaf change was positive only in the supplemented orchids showing that higher reproductive success is more common in orchids with more frequent precipitation (F = 56.59, p < 0.0001). With 82% mortality in the orchid group with restricted precipitation frequency, 64 % mortality in the ambient orchids, and only 10% mortality in the group of orchids given supplemented mist, results suggest that L. jimenezii is negatively impacted by current and future conditions with more variable precipitation, and that the mistier 1970s conditions provide an adequate habitat for the orchids. Este estudio examina los efectos del aumento de frecuencia en las precipitaciones, para imitar la que se encontro en 1970, en un determinado miembro de la familia Orchidaceae, Lepanthes jimenezii (Pounds et al. 1999). Además compara tales efectos con los que L. jimenezii experimenta en las condiciones actuales y las que pueden ocurrir en el futuro.


Orchids, Orquideas, Rainfall anomalies, Anomalias de precipitacion, Reproduction, Reproduccion, Costa Rica--Puntarenas--Monteverde Zone, Costa Rica--Puntarenas--Zona de Monteverde, CIEE Spring 2007, CIEE Primavera 2007


Student affiliation : Department of Environmental Science, University of Tennessee at Chattanooga Born Digital

Subject: topical

Orchids; Orquideas; Rainfall anomalies; Anomalias de precipitacion; Reproduction; Reproduccion; CIEE Spring 2007; CIEE Primavera 2007

Subject: geographic

Costa Rica--Puntarenas--Monteverde Zone; Costa Rica--Puntarenas--Zona de Monteverde



Holding Location

Monteverde Institute MVI



Precipitation variation and its effects on the reproductive success and survival of Lepanthes jimenezii (Orchidaceae)



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