Laguna : 汽水域研究

ダウンロード数 : ?
Laguna : 汽水域研究 1
1994-03 発行

Dinoflagellate Cysts Assemblage Found in thc Surface Sediments of Lake Nakaumi, Western Japan

小島 夏彦
髙安 克已
Rossigneux Jean-Claude
ファイル
内容記述(抄録等)
Dinoflagellate cysts occur extensively in the surface sediments of Lake Nakaumi, brackish-water lake in western Japan. The cyst assemblage is composed mainly of Brigantedinium spp., Algidasphaeridium? sp. aff. minutum, and other heterotrophic species. The assemblage is formed in a high productivity area, maintained by waters rich in dissolved nutrients from rivers. The change of the species composition in the lake is hardly observed. The species composition rate, however, indicates some differences in waters in the lake. The disparity is probably caused by an inflow of fresh water from some rivers around the lake, and may be directly influenced by salinity fluctuations.
Key words: brackish-water lake, dinoflagellate cyst, heterotrophic species, Lake Nakaumi, salinity