Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Ecology, 85(9), 2004, pp. 26162629 2004 by the Ecological Society of America
 

Summary: 2616
Ecology, 85(9), 2004, pp. 26162629
2004 by the Ecological Society of America
COMMUNITY-WIDE IMPACTS OF HERBIVORE-INDUCED PLANT
RESPONSES IN MILKWEED (ASCLEPIAS SYRIACA)
PETER A. VAN ZANDT1
AND ANURAG A. AGRAWAL
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario, Canada M5S 3B2
Abstract. The effects of early-season herbivory and subsequent induced plant responses
have the potential to affect the diversity of herbivorous insect communities. We investigated
the seasonal development of the herbivore fauna on common milkweed (Asclepias syriaca)
to understand the effect of early-season herbivory by different species on insect growth,
natural colonization, and community composition. First, we showed that damage by an
early-season stem-feeding weevil (Rhyssomatus lineaticollis) reduced growth of monarch
larvae (Danaus plexippus) and leaf beetle larvae (Labidomera clivicollis), suggesting that
plant quality is reduced by weevil damage. To better understand the potential for initial
herbivore damage to affect subsequent colonization by herbivores in the field, we compared
undamaged controls to plants experimentally damaged with one of three herbivores: weevils,
monarchs, or leaf beetles. We counted seven species of naturally colonizing herbivores on
all plants for the next two months to assess colonization, damage, and insect community

  

Source: Agrawal, Anurag - Department of Ecology and Evolutionary Biology & Entomollogy, Cornell University
Van Zandt, Peter - Biology Department, Birmingham-Southern College

 

Collections: Environmental Sciences and Ecology