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Factors contributing to the seasonal occurrence of the willow leaf beetle Plagiodera versicolora
Author(s) -
Egusa Sawako,
Nishida Takayoshi,
Fujisaki Kenji,
Sawada Hiroichi
Publication year - 2005
Publication title -
population ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 59
eISSN - 1438-390X
pISSN - 1438-3896
DOI - 10.1007/s10144-005-0211-6
Subject(s) - willow , biology , leaf beetle , abundance (ecology) , biological dispersal , ecology , population , habitat , larva , demography , sociology
We conducted a 3‐year study of a natural population of the willow leaf beetle Plagiodera versicolora (Coleoptera: Chrysomelidae) on a river bank of the Inukami River, Shiga, central Japan, where four willow species ( Salix chaenomeloides , S. eriocarpa , S. integra , and S. serissaefolia ) occur sympatrically. Our survey showed that: (1) at the study site, the abundance of P. versicolora greatly varied among years and among willow species; (2) adult abundance changed seasonally with species‐specific patterns on different willow species; and (3) the dispersal‐settlement of adults had the most pronounced effects on the seasonal population growth rate of P. versicolora . Factors affecting these results were discussed.