2014年4月、6月、8月、9月和11月对天津港附近海域浮游植物群落结构进行初步调查。结果表明，该调查共鉴定浮游植物2门17科20属共40种，浮游植物丰度0．03×104～10．12×104个／L ，生物量0．28～32．50μg／L ，浮游植物种类组成为硅藻门占绝对优势，共10科13属28种，占总数的68．3％。5航次调查浮游植物平均多样性指数、丰富度指数和均匀度指数分别为1．2462、0．7539和0．4305，综合分析天津港附近海域浮游植物多样性水平较低，群落组成较为单一。%Features of the phytoplankton community structure were studied in waters near the Tianjin Port in April ,June ,August ,September and November in 2014 .The results showed that a total of 40 species from 20 genera belonging to 17 families in 2 phyla were identified in the surveyed area .The cell abundance of phytoplankton in survey area was from 0 .03 × 104cells/L to 10 .12 × 104cells/L ,density from 0 .28μg/L to 32 .50 μg/L ,the absolute dominat bacillariophya in phytoplankton species ,including 28 species from 13 genera belonging to 28 families ,accounting for 68 .3% of the total species .The average of Shannon‐Wiener index ,Margalef and Pielou index of phytoplankton in the 5 cruises was 1 .2462 ,0 .7539 and 0 .4305 ,re‐spectively .The comprehensive analysis revealed that the phytoplankton biodersity in the Tianjin Port near waters of Bohai Bay was low level and simple in community composition .
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