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UID:20250818T103007EDT-7788uxxuLE@132.216.98.100
DTSTAMP:20250818T143007Z
DESCRIPTION:Special seminar by David Hembry\, PhD\, Department of Entomolog
 y\, Cornell University\n\nUnderstanding the role of species interactions i
 n the generation and maintenance of insect diversity across spatial and te
 mporal scales is a central goal of insect systematics and of evolutionary 
 ecology generally. Here\, I explore the longstanding hypothesis that mutua
 lism acts as a constraint in evolution using interactions between brood po
 llinating leafflower moths and their host leafflower plants. First\, I use
  an insular co-radiation of pollinating leafflower moths and leafflower tr
 ees on oceanic islands in the South Pacific to show that despite extremely
  high species-specificity\, these brood pollination interactions can be hi
 ghly dynamic and labile over evolutionary timescales and may not diversify
  via cospeciation. Second\, I show how this mutualism has repeatedly broke
 n down into parasitism—in fact\, more so than any known mutualism examined
  to date. I further demonstrate that the transition to parasitism has perm
 itted gains in ecological opportunity for some parasitic lineages. These r
 esults suggest that mutualism may function as a constraint at certain macr
 oevolutionary scales\, while not constraining hostshifts and colonization 
 of remote islands over shorter evolutionary timescales. Furthermore\, thes
 e studies demonstrate how we can use phylogenetic approaches\, in tandem w
 ith other methods\, to study the role of interactions between insects and 
 other organisms in generating insect biodiversity.\n\nEVERYONE IS WELCOME 
 TO ATTEND\n
DTSTART:20190527T143000Z
DTEND:20190527T143000Z
LOCATION:R3-048\, Raymond Building\, CA\, QC\, St Anne de Bellevue\, H9X 3V
 9\, 21111 Lakeshore Road
SUMMARY:Evolution and diversification of mutualism and parasitism between l
 eafflower moths and their host plants
URL:/macdonald/channels/event/evolution-and-diversific
 ation-mutualism-and-parasitism-between-leafflower-moths-and-their-host-297
 387
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