Plant-animal interactions and fruit production in a neotropical herb: a path analysis

D. W. Schemske, C. C. Horvitz

Research output: Contribution to journalArticle

141 Scopus citations

Abstract

Used path analysis to estimate the direct and indirect effects of antguards, an ant-tended herbivore, and pollinators, on flower and fruit production in Calathea ovandensis (Marantaceae), a neotropical herb. Natural variation in these plant-animal interactions was quantified for individual plants in Veracruz, Mexico. Antguards had a positive direct effect on flower number and, because of the positive effect on flower number on fruit number, had a positive indirect effect on mature fruit number. The herbivore had a negative direct effect on flower number and mature fruit number. The composition of the pollinator community was very different in 2 study years, with a marked increase in the number of visits by efficient pollinators in 1985. This change was reflected in between-year differences in the effects of pollinators on number of initiated fruits. In 1984, pollinators had no significant effect on initiated fruit number, while the 2 pollinators that increased in abundance in 1985 had significant effects on initiated fruit number in that year. -from Authors

Original languageEnglish (US)
Pages (from-to)1128-1137
Number of pages10
JournalEcology
Volume69
Issue number4
DOIs
StatePublished - Jan 1 1988
Externally publishedYes

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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