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Reproductive Ecology of Understory Species in a Tropical Montane Forest in Costa Rica 1
Author(s) -
Wesselingh Renate A.,
Witteveldt Martin,
Morissette Julienne,
Nijs Hans C. M.
Publication year - 1999
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.1744-7429.1999.tb00412.x
Subject(s) - biology , understory , cloud forest , ecology , montane ecology , pollinator , predation , biological dispersal , bumblebee , seed dispersal , pollination , population , canopy , demography , sociology , pollen
The reproductive ecology of nine hermaphroditic understory species in a tropical montane Quercus forest was studied at two sites (2300 and 2600 m elev.) in the Cordillera de Talamanca, Costa Rica. Flower life span, studied in six species, averaged 4.4 d. This is longer than flower life spans found in the Monteverde cloud forest (2.7 d) and comparable to flower life spans found for arctic and alpine species. We studied the breeding system in five species and found no self‐incompatible species. Four species proved self‐compatible, and three of these showed autogamy. The main diurnal insect pollinator was the bumblebee Bombus ephippiatus . Natural fruit set was low (8‐32%) in six species with few seeds per fruit, while two many‐seeded species showed a high rate of fruit set (90 and 96%). The incidence of pre–dispersal seed predation was high; the percentage of seeds infested in four species ranged from 8 to 56 percent.