Tropical Ecology and Conservation [Monteverde Institute]

Alternative Title

Función y tamaño de optimización de Mucuna urens vexillum

Creator

Mark Macedo

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Publication Date

May 2002

Abstract

This study examines the role of the vexillum as an aural nectar guide in the species Mucuna urens. Field manipulations show that the vexillum of M. urens enhances visitation and pollen removal (X2 = 52.8, p<.001). Subsequent observational studies conducted on bat visited hummingbird feeders support this finding as well (X2 = 10.67, p< .005). Data also show an increase in vexillum size correlated with number of bats visits (X2 = 32.06, p < .001). Two explanations are offered for why M. urens and other bat pollinated flowers in the genus have not developed as large a vexillum as possible. Investment return optimization is one possible explanation. Niche partitioning of potential pollinators is another. Este estudio examina el papel del "vexillum" como una guía auricular de néctar en la especie Mucuna urens. Las manipulaciones del campo muestran que el vexillum de M. urens aumenta las visitas y la remoción de polen (X2 = 52.8, P<.001). Las observaciones en los comederos de colibríes que fueron visitados por los murciélagos apoyaron estas observaciones (X2 = 10.67, P <. 005). Los datos mostraron que un aumento en el tamaño de vexillum tuvo correlación con el número de visitas de los murciélagos (X2 =32.06, P <. 001). Dos alternativas se ofrecen para explicar porque M. urens y otras flores polinizadas por murciélagos en el mismo género no han desarrollado un vexillum tan grande como es posible. La optimización del regreso de la inversión y la división de nicho de los polinizadores potenciales son las posibles explicaciones.

Keywords

Plants--Reproduction, Plantas--Reproduccion, Pollination, Polinizacion, Monteverde Biological Station (Costa Rica), Estacion Biologica de Monteverde (Costa Rica), Monteverde Cloud Forest Reserve (Costa Rica), Reserva Biologica Bosque Nuboso Monteverde (Costa Rica), CIEE Spring 2002, CIEE Primavera 2002

Description

Student affiliation : Department of Biology, Occidental College, Los Angeles, CA Digitized by MVI

Subject: topical

Plants--Reproduction; Plantas--Reproduccion; Pollination; Polinizacion; CIEE Spring 2002; CIEE Primavera 2002

Subject: geographic

Monteverde Biological Station (Costa Rica); Estacion Biologica de Monteverde (Costa Rica); Monteverde Cloud Forest Reserve (Costa Rica); Reserva Biologica Bosque Nuboso Monteverde (Costa Rica)

Genre

Reports

Holding Location

Monteverde Institute MVI

Identifier

M39-00104

Function and size optimization in Mucuna urens vexillum

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