TY - JOUR
T1 - Resource use of insect seed predators during general flowering and seeding events in a Bornean dipterocarp rain forest
AU - Nakagawa, M.
AU - Itioka, T.
AU - Momose, K.
AU - Yumoto, T.
AU - Komai, F.
AU - Morimoto, K.
AU - Jordal, B. H.
AU - Kato, M.
AU - Kaliang, H.
AU - Hamid, A. A.
AU - Inoue, T.
AU - Nakashizuka, T.
N1 - Funding Information:
The authors express their sincere thanks to T.K. Chua, Hua-Seng Lee, Lucy Chong and the staff of Sarawak Biodiversity Center and Forest Department Sarawak for their kind permission of our project and export of insect specimens for further identification, and Toshiya Yoshida, Tanaka Kenta and Kaori Sato for their help in our fieldwork. We also acknowledge Yutaka Yoshiyasu for identification of Pyralidae and Crambidae, Roger A. Beaver (Scolytidae) and Tosihisa Saito (Immidae). This study was partly supported by Grants-in-Aid of the Japanese Ministry of Education, Science and Culture (Numbers 04041067, 06041013, and 09NP1501), by CREST and JSPS Research Fellowships for young scientists for M. Nakagawa.
PY - 2003/10
Y1 - 2003/10
N2 - Insect seed predators of 24 dipterocarp species (including the genera of Dipterocarpus, Dryobalanops and Shorea) and five species belonging to the Moraceae, Myrtaceae, Celastraceae and Sapotaceae were investigated. In a tropical lowland dipterocarp forest in Sarawak, Malaysia, these trees produced seeds irregularly but intensely during general flowering and seeding events in 1996 and/or 1998. Dipterocarp seeds were preyed on by 51 insect species (11 families), which were roughly classified into three taxonomic groups: smaller moths (Tortricidae, Pyralidae, Crambidae, Immidae, Sesiidae and Cosmopterigidae), scolytids (Scolytidae) and weevils (Curculionidae, Apionidae, Anthribidae, and Attelabidae). Although the host-specificity of invertebrate seed predators has been assumed to be high in tropical forests, it was found that the diet ranges of some insect predators were relatively wide and overlapped one another. Most seed predators that were collected in both study years changed their diets between general flowering and seeding events. The results of cluster analyses, based on the number of adults of each predator species that emerged from 100 seeds of each tree species, suggested that the dominant species was not consistent, alternating between the two years.
AB - Insect seed predators of 24 dipterocarp species (including the genera of Dipterocarpus, Dryobalanops and Shorea) and five species belonging to the Moraceae, Myrtaceae, Celastraceae and Sapotaceae were investigated. In a tropical lowland dipterocarp forest in Sarawak, Malaysia, these trees produced seeds irregularly but intensely during general flowering and seeding events in 1996 and/or 1998. Dipterocarp seeds were preyed on by 51 insect species (11 families), which were roughly classified into three taxonomic groups: smaller moths (Tortricidae, Pyralidae, Crambidae, Immidae, Sesiidae and Cosmopterigidae), scolytids (Scolytidae) and weevils (Curculionidae, Apionidae, Anthribidae, and Attelabidae). Although the host-specificity of invertebrate seed predators has been assumed to be high in tropical forests, it was found that the diet ranges of some insect predators were relatively wide and overlapped one another. Most seed predators that were collected in both study years changed their diets between general flowering and seeding events. The results of cluster analyses, based on the number of adults of each predator species that emerged from 100 seeds of each tree species, suggested that the dominant species was not consistent, alternating between the two years.
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U2 - 10.1079/BER2003257
DO - 10.1079/BER2003257
M3 - Article
C2 - 14658448
AN - SCOPUS:0242338606
VL - 93
SP - 455
EP - 466
JO - Bulletin of Entomological Research
JF - Bulletin of Entomological Research
SN - 0007-4853
IS - 5
ER -