Additional Notes on Drosophilid Flies (Diptera, Drosophilidae) in the Bonin Islands, with Descriptions of Two New Species

概要

論文の詳細を見る
Additional information on drosophilid taxonomy and ecology in the Bonin Islands is given, based on unpublished data accumulated since 1979. Two new species are described. The recent history of drosophilid faunal changes in the Bonins, including speculation on colonization and extinction, is sketched by compiling all collection records obtained so far. In accordance with the MACARTHUR-WILSON "equilibrium theory of island biogeography", the numbers of drosophilid species in Chichijima and Hahajima are regarded as being in a dynamic equilibrium at the level of 16 or 17 with considerable rates of turnover, which are estimated to be 1.11% to 1.72% per year. This equilibrial level is much lower than those in mainland local faunae, as predicted from the theory. The ecological structure of the drosophilid community in the Bonins is compared with those of mainland communities. It is characterized by the lack of some elements due to the reduced habitat diversity and the niche expansion of component species.
日本昆虫学会の論文
1987-06-25