嵊泗列岛养殖海区浮游植物、赤潮生物的研究

STUDIES ON PHYTOPLANKTON AND RED TIDE ORGANIZMS IN MARICULTURE AREA AROUND SHENGSI ISLANDS,CHINA

本文列出了嵊泗列岛养殖海区1990年4月至1991年3月主要生态调查结果。浮游植物密度:0.5m 水层为1.62×10~2——2.51×10~6Cells/L,0—7m 水层为1.8×10~4——3.65×10~8Cells/m^3,八月和十一月出现两次高峰,周年出现浮游植物143种、赤潮生物38种,6—9月是该区赤潮发生季节。此外,还对几种主要赤潮生物的周年变化和发生赤潮时该赤潮生物的衰变特点进行了分析,对两年发生六次赤潮的生物组成、赤潮与赤潮生物密度之间的关系进行了讨论。

The paper gives the results of a annual investigation on the monthly major ecological conditions of the mariculture areas of Shengsi Islands from April 1990 to March 1991.The Density of phytoplankton was found to be 1.62×10~2～2.51～10~8 cells/L at 0.5m water layer,and 1.8×10~4～3.65×10~8 cells/ m^3 at 0—7m layer.Seasonal changes during the year of observation showed 2 peaks,one in August and the other in November. During the year,143 species of phytoplankton and 38 species of red tide organisms were noted. A brief account is given of the annual changes in some of the principal red tide organisms and their decay character during red tides.June-September is the period when red tides occur in these areas.The paper reports also on the biological compositions observed during 6 red tides occurring over a period of 2 years,and discusses the interrelationship between the red tides and the density of red tides organisms.