Wang Xing, Wang Yu, Liu Lusan, Shu Jianmin, Zhu Yanzhong, Zhou Juan
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
ScientificWorldJournal. 2013 Jul 25;2013:436965. doi: 10.1155/2013/436965. eCollection 2013.
Eight typical sampling sites were chosen to investigate the phytoplankton community structure and to assess the eutrophication degree of Baiyangdian Lake in 2009. Our results showed that among the total 133 species identified, Cyanophyta, Chlorophyta, and Bacillariophyta dominated the phytoplankton community. In spring, Chlorophyta and Bacillariophyta were the dominant phyla, and the dominant species included Chlorella sp., Chroomonas acuta Uterm., and Microcystis incerta Lemm.; the density of the phytoplankton ranged from 496 × 10(4) to 6256 × 10(4) cells/L with an average of 2384 × 10(4) cells/L. However, Chlorophyta and Cyanophyta became the dominant phyla in summer, and the dominant species were Chlorella sp., Leptolyngbya valderiana Anagn., and Nephrocytium agardhianum Nageli.; the density of the phytoplankton varied from 318 × 10(4) to 4630 × 10(4) cells/L with an average of 1785 × 10(4) cells/L. The density of the phytoplankton has increased significantly compared to the previous investigations in 2005. The index of Carlson nutritional status (TSIM) and the dominant genus assessment indicated that the majority of Baiyangdian Lake was in eutrophic state.
2009年，选取了8个典型采样点调查白洋淀浮游植物群落结构并评估其富营养化程度。结果表明，在所鉴定出的133个物种中，蓝藻门、绿藻门和硅藻门在浮游植物群落中占主导地位。春季，绿藻门和硅藻门为优势门类，优势种包括小球藻属、尖顶蓝隐藻、不定微囊藻；浮游植物密度范围为496×10⁴至6256×10⁴个/升，平均为2384×10⁴个/升。然而，夏季绿藻门和蓝藻门成为优势门类，优势种为小球藻属、瓦氏鞘丝藻、阿氏肾形藻；浮游植物密度在318×10⁴至4630×10⁴个/升之间变化，平均为1785×10⁴个/升。与2005年之前的调查相比，浮游植物密度显著增加。卡尔森营养状态指数（TSIM）和优势属评估表明，白洋淀大部分区域处于富营养状态。
