|| 要旨トップ | 本企画の概要 |||日本生態学会第57回全国大会 (2010年3月，東京) 講演要旨|
In the Southeast Asian rainforests, general flowering (GF), a community-wide synchronous flowering, occurs at irregular and supra-annual intervals. During GF periods, most Dipterocarpaceae and many other trees flower profusely, while flowering plants are scant between GF periods. During flowerless periods, anthophilous animals that depend on floral resources for food may suffer food shortages and subsequently decrease in abundance. At Lambir Hills National Park, chrysomelid adults were observed to feed on dipterocarp flowers (petals) during GF periods in 1996. However, the means by which they respond to GF and survive flowerless periods remain unknown. My co-worker and I determined the abundances of flower-visiting chrysomelids during GF and non-GF periods by examining light-trap samples and the feeding preferences of chrysomelids between GF periods. We found that the number of chrysomelid species and their abundance are maintained between GF periods; these species maintain their abundance by feeding on the young leaves of dipterocarps and on the young leaves and flowers of non-dipterocarps. In the presentation, I aim to reveal these findings and to introduce the diverse patterns of insect responses to GF periods.