ユウコウチュウ ノ サンジョウ カラ ミタ 2003ネン シュンキ ノ アカシオ ハッセイ キ ノ ナカウミ ノ カイキョウ
Water conditions during the time of red tide occurrence in spring, 2003,and the associated benthic foraminifera in Lake Nakaumi
d0070011011.pdf 1.37 MB
Benthic foraminifera such as Trochammina hadai and Saccammina sp. occur along with biological aggregates(marine snow)that suspended in the brackish waters of Lake Nakaumi. These species are common in organic rich sediments at greater depths in this lake. The biological aggregates were mainly composed of a dinoflagellate Prolocentrum minimum, which formed a red tide in the spring of 2003. The presence of these foraminiferal species strongly suggests that strong wind stress caused turbulence that disturbed bottom sediments leading to dispersion at middle water depths. In addition to the observations based on this foraminiferal occurrence, the mixing of deeper and shallower water at the halocline is a significant factor leading to outbreaks of red tide.
biological aggregates(marine snow)
Laguna : 汽水域研究
Departmental Bulletin Paper
Estuary Research Center