|| 要旨トップ | 目次 |||日本生態学会第62回全国大会 (2015年3月、鹿児島) 講演要旨
一般講演（ポスター発表） PB1-059 (Poster presentation)
Evolutionary changes and genetic variation can drive ecological dynamics over short timescales. However, few studies has explored whether the phenomenon actually occurs in natural ecosystems. In this study, we conducted a large-scale field experiment to examine how genetic variation in adaptive traits of an herbivorous insect, Plagiodera versicolora, affect its population dynamics, and whether the variation impacts on shaping tree-associated arthropod communities. Plagiodera beetle has between-population genetic variation in feeding preference for leaf-age types and we found genetic correlation between the preference and predator avoidance behavior. In July 2014, we set up tree-canopy enclosures of mature willows and released genetically distinct Plagiodera populations with following treatments: single-source populations and mixed-source populations, respectively. Our results showed that population dynamics of Plagiodera beetle was significantly different among treatments. Furthermore, arthropod community structure was also affected by the genetic variation in Plagiodera.