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Three hundred and sixteen species of moths in 37 families were collected in the garden of the Institute for Nature Study. Tokyo (INST) in 1998-2000. All the collection data are given in the list. About 50 years ago, 330 moths in 25 families were recorded from the same garden (National Institute for Nature Study, ed., 1952). On the other hand, 501 species in 42 families of moths were recorded from the Imperial Palace, Tokyo (IPT) ca. 6km NNE of INST, by a research from 1996 to 2000 (Owada et al., 2000). The present moth fauna of INST2000 is poorer than that of INST1952 and more similar to that of IPT2000 (Table 1). In those days of the 1950's "micro-moths" were not so well studied in Japan, that the poorness of the moth fauna of INST2000 is emphasized in macro-moths" excepting "micro-moths". It is worth noting that the macro-moth fauna of INST2000 is also more similar to that of IPT2000 than to that of INST 1952. Number of species in moth families decreased to less than a half in 10 families during this half century in INST, that is, Zygaenidae, Sesiidae, Thyrididae, Drepanidae, Uraniidae, Lasiocampidae, Saturniidae, Sphingidae, Notodontidae and Arctiidae. Extinction of such larger moths as Drepanidae from 11 species to 2,Lasiocampidae from 7 to 0,Saturniidae from 6 to 0,Notodontidae from 14 to 2 is serious. It is doubtless that the extinction of these moths is caused by the aggravation of urban environment, viz., air pollution, brightness at night by the illuminations of high buildings and street mercury lamps, dried condition in the Tokyo city area, isolation of the garden of INST by urban buildings, etc. In addition to these, it should be stressed that succession of the forest of INST has advanced to the final phase, or a forest of evergreen broad-leaved trees, and that a dark condition under the forest may be the cause of decline of biodiversity.
国立科学博物館の論文
2001-12-10

自然教育園の蛾類

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