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Type: Artigo de periódico
Title: Beneficial effects of flower-dwelling predators on their host plant
Author: Romero, GQ
Vasconcellos-Neto, J
Abstract: We examined the effects of the sit-and-wait spider Misumenops argenteus (Thomisidae) on the herbivore assemblage and fitness of the perennial woody shrub Trichogoniopsis adenantha (Asteraceae). Because crab spiders prey on both pollinators and phytophagous insects, they can have potentially negative and positive effects on plants. In a manipulative experiment using paired plants, spiders decreased the density of sucking and some endophagous herbivores on the leaves and capitula and reduced the number of damaged achenes produced by the plants. Damaged capitula had a higher proportion of fertilized achenes in plants with spiders than without spiders, but not undamaged capitula. These results indicate that M. argenteus exerted a double positive effect on seed production in T. adenantha. The effect of M. argenteus on herbivores may be taxon specific and vary among years with different herbivore abundances.
Subject: Asteraceae
direct and indirect effects
floral herbivory
phytophage assemblage
plant fitness
seed predators
southeastern Brazil
thomisid spider
Trichogoniopsis adenantha
tri-trophic interactions
Country: EUA
Editor: Ecological Soc Amer
Rights: aberto
Identifier DOI: 10.1890/02-0327
Date Issue: 2004
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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