Institute of Hydrobiology, Jinan University, Guangzhou 510632, China.
J Environ Sci (China). 2009;21(9):1268-75. doi: 10.1016/s1001-0742(08)62414-6.
Environmental characteristics and phytoplankton community structure were investigated in two aquaculture areas in Dapeng Cove of Daya Bay, South China Sea, between April 2005 and June 2006. Phytoplankton abundance ranged between 5.0 and 8877.5 cells/mL, with an average of 751.8 cells/mL. The seasonal cycle of phytoplankton were demonstrated by frequent oscillations, with recurrent high abundances from late spring to autumn and a peak stage in late winter. Diatoms were the predominant phytoplankton group, accounting for 93.21% of the total abundance. The next most abundant group was the dinoflagellates, which made up only 1.24% of total abundance. High concentrations of Alexandrium tamarense (Lebour) Balech with a maximum of 603.0 cells/mL were firstly recorded in this area known for high rates of paralytic shellfish poisoning (PSP) contamination. Temperatures and salinities were within the suitable values for the growth of phytoplankton, and were important in phytoplankton seasonal fluctuations. The operation of the Daya Bay Nuclear Power Station (DNPS) exerts influences on the phytoplankton community and resulted in the high abundances of toxic dinoflagellate species during the winter months. Dissolved inorganic nitrogen (DIN) and dissolved silicate (DSi) were sufficient, and rarely limited for the growth of phytoplankton. Dissolved inorganic phosphorus (DIP) was the most necessary element for phytoplankton growth. The enriched environments accelerated the growth of small diatoms, and made for the shift in predominant species from large diatom Rhizosolenia spp. to chain-forming diatoms such as Skeletonema costatum, Pseudo-nitzschia spp. and Thalassiosira subtilis.
2005 年 4 月至 2006 年 6 月期间，在中国南海大鹏湾的两个水产养殖区调查了环境特征和浮游植物群落结构。浮游植物丰度在 5.0 到 8877.5 个细胞/毫升之间，平均值为 751.8 个细胞/毫升。浮游植物的季节性变化表现为频繁的波动，从春末到秋季频繁出现高丰度，冬季末期达到峰值阶段。硅藻是主要的浮游植物群，占总丰度的 93.21%。下一个最丰富的群体是甲藻，仅占总丰度的 1.24%。在这个以高麻痹性贝类毒素 (PSP) 污染率而闻名的地区，首次记录到亚历山大藻 (Lebour) Balech 的高浓度，最高达 603.0 个细胞/毫升。温度和盐度处于浮游植物生长的适宜范围内，对浮游植物的季节性波动起着重要作用。大亚湾核电站 (DNPS) 的运行对浮游植物群落产生影响，导致冬季有毒甲藻物种的高丰度。溶解无机氮 (DIN) 和溶解硅酸盐 (DSi) 充足，很少限制浮游植物的生长。溶解无机磷 (DIP) 是浮游植物生长最必需的元素。富营养化环境加速了小型硅藻的生长，导致优势种从大型硅藻 Rhizosolenia spp. 向链状硅藻如 Skeletonema costatum、Pseudo-nitzschia spp. 和 Thalassiosira subtilis 转移。
