钦州湾茅尾海周年环境因子及浮游植物群落特征

Annual Change of Environmental Factors and Phytoplankton Community Characteristics in Maowei Sea of Qinzhou Bay

关键词:  茅尾海  环境因子  浮游植物  种类  数量  多样性

Key words:  the Maowei Sea  environmental factors  phytoplankton  species  abundance  biodiversity

摘要:

2010年1月、3月、6月及9月,共设14个调查站位对钦州湾茅尾海海域的环境因子及浮游植物的种类组成、优势种类、数量分布和群落多样性进行调查分析。结果茅尾海海区营养盐中PO₄³-P值为0.01~0.07 mg/dm³,DIN值为0.16~0.78 mg/dm³,PO₄³-P值和DIN值均有超4类海水水质标准现象。浮游植物共鉴定出82属,262种,优势种类16种,年平均丰度为6.29×10⁴ cells/L,生物多样性指数的年平均值为3.87。2010年茅尾海浮游植物种类和数量都比较丰富,种类的季节变化呈现由冬至秋减少的趋势,数量的季节变化比较明显,春季最低,平均密度仅为3.28×10⁴ cells/L,夏季最高,平均密度为9.25×10⁴ cells/L。

Abstract:

Environmental factors, phytoplankton species composition, dominant species, amount of distribution and community structure were investigated in January, March, June and September of 2010 in Maowei Sea of Qinzhou Bay.The results showed that, in the survey area, the concentration of PO₄^3--P was 0.01~0.07 mg/dm³, DIN was 0.16~0.78 mg/dm³, and both values of PO₄^3--P and DIN had scaled over Type Ⅳ water quality standards at some stations.262 species belonged to 82 genera of phytoplankton were identified, and there were 16 kinds of dominant species among them.The phytoplankton abundance average was 6.29×10⁴ cells/L, and the annual average index of biodiversity was 3.87.The species number of phytoplankton had a decreasing trend from winter to autumn.There was an obvious seasonal change in the cell abundance, being the lowest (3.28×10⁴ cells/L) in spring (March) and highest (9.25×10⁴ cells/L) in summer (June).