20世紀における東京湾プランクトン珪藻の遷移

概要

論文の詳細を見る
A distinctive change in the diatom flora of central Tokyo Bay is identified in a sediment core spanning the last one hundred years. The shift is attributed to an ongoing eutrophication process. The change, which took place around 1960, is characterized by a change in the diatom assemblage, from diatoms commonly found in waters entering the bay from the North Pacific through a channel in the bay's southern reaches, to those generally abundant in waters influenced by freshwater and nutrient inputs from large rivers flowing into the northwestern part of the bay. High fluxes of Thalassionema nitzschioides and moderate fluxes of Bacteriastrum species, Odontella longicruris and Thalassionema frauenfeldii, are evident in the pre-1950 flora, whereas Skeletonema costatum is highly abundant and Thalassiosira allenii and Thalassiosira binata moderately abundant in the post-1965 flora.
国立科学博物館の論文
2003-12-22