A test of the pollinator limitation hypothesis for a neotropical herb

C. C. Horvitz, D. W. Schemske

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

Hand pollination of Calathea ovandensis (Marantaceae) increased the number of initiated fruits by 24%, number of mature fruits by 6.8%, and number of seeds by 12.6%, but only the first of these differences was statistically significant. The proportion of flowers that matured fruits was very low compared with data reported for other species: 8.1% for hand-pollinated treatment, 7.4% for open-pollinated controls. The proportion of flowers that initiated fruits was also quite low: 24.5% for hand-pollinated plants, 20.2% for open-pollinated plants. Antguards attracted to extrafloral nectaries on the inflorescence appeared to stimulate flower production, while an ant-tended herbivore of reproductive tissues had a negative effect on fruit maturation. While fruit initiation was pollen-limited, mature fruit and seed production were limited primarily by resources. -from Authors

Original languageEnglish (US)
Pages (from-to)200-206
Number of pages7
JournalEcology
Volume69
Issue number1
DOIs
StatePublished - Jan 1 1988

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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