Oecologia

, Volume 92, Issue 2, pp 250–256

Leaf production, reproductive patterns, field germination and seedling survival in Chamaedorea bartlingiana, a dioecious understory palm

  • Michele Ataroff
  • Teresa Schwarzkopf
Original Papers

DOI: 10.1007/BF00317372

Cite this article as:
Ataroff, M. & Schwarzkopf, T. Oecologia (1992) 92: 250. doi:10.1007/BF00317372

Summary

Chamaedorea bartlingiana is a dioecious palm that grows in the cloud forest understories of the Venezuelan Andes. Age and sexual differences in phenology and reproductive patterns were studied in labelled individuals of all age categories. This species has long-lived leaves and low leaf production, both characteristic of understory plants. Growth rates are lower in juveniles than in adults and in females than in males, as in other palms. Male and female individuals show different reproductive patterns. Male inflorescences are always produced at the same rate and the probability of surviving until anthesis is constant. Females produce reproductive buds at the same rate as males, but these buds have a 35% probability of becoming a ripe infrutescence if the plant has infrutescences already growing, and 70% if it does not. This pattern and the slow growth of inflorescences (1 year for males from bud to flowers, 2 years for females from bud to ripe fruits) cause a pluriannual reproductive pattern at the population level. Field germination does not follow this pattern, but shows one annual peak probably related to environmental conditions.

Key words

Chamaedorea bartlingianaDioecyVegetative phenologyReproductive phenologySeedlings

Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • Michele Ataroff
    • 1
  • Teresa Schwarzkopf
    • 1
  1. 1.Centro de Investigaciones Ecológicas de Los Andes Tropicales (CIELAT), Fac. CienciasUniversidad de Los AndesMéridaVenezuela