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Differential Effects of Avian Nectar‐Robbing on Fruit Set of Two Venezuelan Andean Cloud Forest Plants 1
Author(s) -
Kjonaas Chris,
Rengifo Carlos
Publication year - 2006
Publication title -
biotropica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.813
H-Index - 96
eISSN - 1744-7429
pISSN - 0006-3606
DOI - 10.1111/j.1744-7429.2006.00119.x
Subject(s) - nectar , biology , botany , pollination , fruit set , cloud forest , ecology , pollen , montane ecology
We quantified nectar‐robbing in two ornithophilus plant species by marking and monitoring robbed flowers and unrobbed flowers of each plant until fruit production. Significantly more marked unrobbed Cavendishia pubescens flowers successfully matured fruits than their robbed counterparts, while fruit set did not differ significantly between robbed and unrobbed flowers of Fuchsia venusta . In C. pubescens , birds of species known to be legitimate visitors sometimes behaved as secondary nectar robbers; conspecific birds handled flowers of F. venusta consistently. This behavioral change may contribute to the observed negative effect of nectar‐robbing on reproduction of C. pubescens.