钦州湾表层水分粒级Chl a分布特征及其影响因素

发布时间：2018-12-25 12:50

【摘要】：于2014年1月(冬季)和10月(秋季)对钦州湾海域进行了综合调查,分析了该海区分粒级Chl a的分布特征及其影响因素。结果表明,冬季Chl a平均浓度为2.38μg/L,秋季Chl a浓度显著升高,平均浓度为6.96μg/L。浮游植物粒级结构具有明显的季节变化特征,冬季浮游植物粒级组成以微型浮游植物为主,平均占Chl a总量的73.0%,小型和微微型浮游植物所占的比例分别为14.9%和12.1%;秋季,小型、微型和微微型浮游植物对Chl a总量的贡献率分别为42.3%、44.7%和12.9%。浮游植物平均粒级指数秋季(23.55μm)显著大于冬季(11.23μm)。从空间分布上看,在高营养盐含量区域大粒径的浮游植物占有优势,而其他靠近外海一侧的站位则以微型浮游植物为主。温度、营养盐和悬浮物是影响钦州湾海域浮游植物粒级Chl a分布和组成的重要环境因子。
[Abstract]:A comprehensive survey of Qinzhou Bay was conducted in January (winter) and October (autumn), and the distribution characteristics and influencing factors of grain size Chl a in Qinzhou Bay were analyzed. The results showed that the average concentration of Chl a was 2.38 渭 g / L in winter, and the concentration of Chl a increased significantly in autumn, with an average concentration of 6.96 渭 g / L. The grain structure of phytoplankton has obvious seasonal variation characteristics. In winter, the grain size composition of phytoplankton is mainly composed of microphytoplankton, which accounts for 73.03.010% of the total Chl a on average. The percentages of small phytoplankton and picoplankton were 14.9% and 12.1%, respectively. In autumn, the contribution rates of small, micro and picoplankton to the total amount of Chl a were 44.7% and 12.9%, respectively. The mean grain size index of phytoplankton in autumn (23.55 渭 m) was significantly higher than that in winter (11.23 渭 m). In terms of spatial distribution, phytoplankton with large size in high nutrient content area is dominant, while other stations near the offshore side are dominated by micro-phytoplankton. Temperature, nutrients and suspended matter are important environmental factors affecting the distribution and composition of grain Chl a of phytoplankton in Qinzhou Bay.
【作者单位】：广西科学院广西近海海洋环境科学重点实验室;广西科学院广西北部湾海洋研究中心;
【基金】：广西自然科学基金(2015GXNSFBA139200) 国家自然科学基金项目(41506146) 广西近海海洋环境科学重点实验室开放基金项目(GXKLHY13-04)
【分类号】：Q948.8;P734

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