@article{oai:nagoya.repo.nii.ac.jp:00007604,
 author = {鈴木, 尊仁 and SUZUKI, Takahito and 井上, 恵介 and INOUE, Keisuke and 小澤, 智生 and OZAWA, Tomowo},
 journal = {名古屋大学博物館報告},
 month = {Dec},
 note = {Marine environments of Ise and Mikawa Bays in the Chubu District have been declining mainly by water pollution and decrease of natural coastal zones by the construction of industrial areas in accordance with the rapid economic growth of Japan since 1960’s. Little scientific research reports have, however, been presented on the decline of marine diversity in these bays since 1960’s. In order to assess and monitor the environmental degradation in these bays since 1960’s, we investigated species diversity of intertidal molluscan communities of three years from March 2002 to November 2004, and recognized 76 species in total. The species number nearly corresponds one third of ca. 200 species in total in 1960’s based on some reliable literatures with lists of species. Qualitative and quantitative samplings for the survey of species diversity were made at 42 stations covering most of the areas and habitats of molluscan communities in these bays. It is confirmed that 76 molluscan species are living in the intertidal zones in these bays. The number of species is approximately one third of that recorded in 1960’s, indicating a mass extinction of the molluscan populations in these bays in the past four decades. The molluscan species commonly found in 1960’s such as Meretrix lusoria (Röding), Umbonium (Suchium) moniliferum (Lamarck) and Batillaria zonalis (Bruguière) are proved to be endangered. Moreover introduced species from abroad such as Crepidula onyx Sowerby, Mytilus galloprovincialis Lamarck, Perna viridis (Linnaeus), Xenostrobus secures (Lamarck) and Meretrix pethechialis (Lamarck) have established their populations in these bays. Seasonal change in the number of species and individuals were also investigated by applying quantitative sampling with a quadrate (25cm×25cm) at three different types of intertidal flats in Shiokawa (mud flats in the innermost of Mikawa Bay), Mikawaisshiki (wide intertidal sand flats formed in front of the Yahagi River delta) and Isuzugawa (narrow sand flats on the Isuzu River delta facing the bay mouth of Ise Bay). It was found that the number of species and individuals decrease remarkably in early autumn by mass mortality of molluscs caused by the upwelling of anoxic bottom water mass of the bays formed in summer. The mass mortality of the parent molluscan animals and defective transport of their larva caused by the upwelling of the anoxic bottom water (so called blue tide) have great influence on the decline of the diversity of molluscan species in these bays.},
 pages = {31--64},
 title = {伊勢湾・三河湾における1960 年代以降の環境劣化と潮間帯軟体動物相の変化},
 volume = {22},
 year = {2006}
}