The Net-phytoplankton Community Structure of the Bohai Sea in Late Summer,2005
The Net-phytoplankton Community Structure of the Bohai Sea in Late Summer,2005
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发表时间：
2008
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通讯作者：
Xu Zong-jun
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作者：
Xu Zong-jun
利用2005年夏末渤海4个断面沿着42个站位的浮游植物综合调查资料，分析了浮游植物群落结构特征。共发现浮游植物114种，隶属于5门48属，其中硅藻31属81种，甲藻13属29种，金藻门1属1种，绿藻门1属1种，渤海近岸沃茨的种类组成不尽相同，但优势种为硅藻，如中肋骨条藻（Spectronema costatum）、中肋骨条藻（Spectronema costatum）、中肋骨条藻（Spectronema costatum）、中肋骨条藻（Spectronema costatum）、中肋骨条藻（Spectronema costatum）等。pseudocurvisetus，nitzschioides海洋线虫，和chaetoceros curvisetus。在phrrophyta中，叉角藻（ceratium forca）为优势种，与同季节历史资料比较发现，部分地区优势种发生变化，浮游植物细胞丰度范围为5.4×104 ~ 23843.8 ×104个细胞/m3，平均约为1083.4 ×104个/m3，高于同季节历史资料，若按测区各点降水量由高到低排列，秦皇岛附近沃茨、辽东湾、黄河口、渤海湾等海域的Shannon Wiener指数在0.54 ~ 0.59之间，渤海湾和秦皇岛附近沃茨生物多样性较高，黄河口次之，辽东湾最低，网采浮游植物群落的生物多样性随着细胞丰度对数的增加而降低。
Features of phytoplankton community structure are analysed,using the data obtained during the comprehensive investigation at the 42 stations along the 4 sections in the Bohai Sea in later summer 2005.Totally 114 species of phytoplankton are found,which belong in 48 generas of 5 phylas,and there are 81 species of diatom in 31 generas,29 species of pyrrophyta in 13 generas,1 species of chrysophyta in 1 genera,1 species of chlorophyta in 1 genera,and 1 species(undetermined) of euglenophyta in 1 genera.There is also 1 species of ebria tripartitus which systematic status is undetermined.The species compositions in the near-shore waters of the Bohai Sea are not identical but the dominant species are of diatom such as skeletonema costatum,chaetoceros pseudocurvisetus,thalassionema nitzschioides,and chaetoceros curvisetus.Among phrrophyta,ceratium furca is dominant.It is found from comparison with historical data obtained in the same seasons that the dominant specics are changed in some area.Phytoplankton cell abundance ranges from 5.4×104 to 23 843.8×104 cells/m3 with an average about 1 083.4×104 cells/m3 and becomes higher than that in the historical data of the same seasons.If the aundance depending upon locations in the survey area is put in an order from the high to the low,it follows that the waters adjacent to Qinhuangdaothe Liaodong Baythe Yellow River estuarythe Bohai Bay.The Shannon wiener index ranges from 0.54 to 4.18 with an average of 2.60.The biodiversity becomes higher in the Bohai Bay and the waters adjacent to Qinhuangdao,the next comes the Yellow River Estuary,and it becomes the lowest in the Liaodong Bay.The biodiversity of the net-phytoplankton community decreases with the increase of logrithm of the cell abundance value.