Anthophilous insect community and plant-pollinator Title interactions on Amami Islands in the Ryukyu Archipelago, Japan (Original paper) Author(s) KATO, Makoto Contributions from the Biological Laboratory, Kyoto Citation University (2000), 29(2): 157-254 Issue Date 2000-03-31 URL http://hdl.handle.net/2433/156116 Right Type Departmental Bulletin Paper Textversion publisher Kyoto University Contr. biol. Lab. Kyoto Univ., Vol. 29, pp. 157-252, pl. 2-3 Issued March 31 2000 Anthophilous insect community and plant-pollinator interactions on Amami Islands in the Ryukyu Archipelago, Japan Makoto KATo Graduate School of Hurnan and Environmental Studies, Kyoto University, Yoshida-Nihonmatsu-cho, Sakyo-ku, Kyoto, 606-8501 Japan e-mail:
[email protected] ABSTRACT Amami Islands, located in the northern part of the Ryukyu Archipelago, are endowed with subtropical climate and rich flora and fauna containing many endemic taxa. In various types of vegetation on the islands, such as Castanopsis-domi- nated lowland forests, Symplocos-dominated mountain forests, mangrove forests, coastal scrub and grassland, I surveyed the flowering phenology and anthophilous insect commu- nities of 164 plant species from 1996 to 1999. Flowering was observed throughout the year, and peaked twice in March and July. A total of 2210 individuals of 610 species in 12 orders of Insecta were observed on the flowers. The most abundant order was Diptera (32SO)6o of individuals), followed by Coleoptera (28906o), Hymenoptera (23SO)6e), Hemiptera (1 1 906o), Lepidoptera (4SO)6o). The bee fauna was composed of six families, 13 genera and 26 species, and characterized by dominance of small bees (e,g., Hylaeus, Lasioglossum and Andrena), large carpenter bees (Xylocopa) and long-tongued anthophorine bees (Tetralonia and Amegt'lla), and by absence of Bombus.