作　　者： ; ; ; (逯晶晶）;

机构地区： 国家海洋局

出　　处： 《应用生态学报》 2013年第6期1686-1692,共7页

摘　　要： 2008—2009年对钦州湾及附近海域进行4个季节航次的浮游植物调查,共鉴定出浮游植物131种,其中硅藻种数最多,达101种,占浮游植物总种数的77.1%;甲藻次之,23种;其他种类3门7种.浮游植物以广温性种和暖水性种为主.总种类数的季节变化与硅藻种类数均为春季最低,夏、秋、冬依次增加,冬季最高.各季节浮游植物丰度为232.28×104～977.0×104cell·m-3,平均为558.57×104cell·m-3;各季节浮游植物丰度呈现夏、春、冬和秋依次减少的趋势;各区域浮游植物丰度四季均为由内湾至外湾先升高、到湾外逐渐降低的趋势,但在夏季其高丰度区由外湾南移至湾口附近.浮游植物群落的Shannon多样性指数和均匀度指数平均值分别为3.18和0.63,多样性水平较高.浮游植物丰度与温度、盐度、溶解性无机氮及活性磷酸盐的相关关系因季节而变化. Four cruise surveys were conducted on the phytoplankton in Qinzhou Bay of South China in different seasons in 2008-2009. A total of 131 phytoplankton species were identified, among which, diatom （101 species） accounted for 30.0% of the total, followed by pyrrophyta （23 species）, and other groups （7 species）. Most of the phytoplankton was of eurytherm or warm-water species. The total species number and the diatom abundance were the smallest in spring, and increased successively in summer, autumn, and winter, being the highest in winter. The phytoplankton density varied from 232.28×104 cell·m-3 to 977.0×104 cell·m-3, with an average of about 558.57×104 cell·m-3. Temporally, the phytoplankton density was the highest in summer, followed by in spring, and the lowest in winter and autumn. Spatially, the phytoplankton density was increased from the inner bay to the open bay, and decreased from the open bay to outside the bay. In summer, the highest density area switched from the open bay to the bay’s entrance. The average Shannon diversity index was 3.18, and the average evenness index was 0.63, suggesting a high diversity of the phytoplankton community. The correlations of the phytoplankton density with the water temperature, salinity, dissolved inorganic phosphorus, and dissolved inorganic phosphorus varied with seasons.

关 键 词： 钦州湾 浮游植物 种类组成 群落多样性

领　　域： [生物学]