Temporal and spatial variations in phytoplankton: correlations with environmental factors in Shengjin Lake, China
Temporal and spatial variations in phytoplankton: correlations with environmental factors in Shengjin Lake, China
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DOI：
10.1007/s11356-015-4640-2
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发表时间：
2015-05
影响因子：
5.8
通讯作者：
Lan Wang;Chao Wang;D. Deng;Xiuxia Zhao;Zhongze Zhou
中科院分区：
文献类型：
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作者：
Lan Wang;Chao Wang;D. Deng;Xiuxia Zhao;Zhongze Zhou
2014年2 - 7月，对升金湖上游浮游植物群落和环境因子的时空变化进行了研究。共鉴定出浮游植物8门84属192种，其中绿藻门占46.4%，硅藻门占29.2%，蓝藻门占12.5%。优势种14种。浮游植物群落具有明显的时空变化。浮游植物总丰度为3.66 × 105~867.93 × 105cells/L，总生物量为0.40~20.89mg/L。Shannon-Wiener多样性指数在3.50~8.35之间，平均为5.58，表明浮游植物群落具有较高的多样性。优势种有明显的时间变化，从硅藻门和隐藻门到蓝藻门和绿藻门。浮游植物生物量和丰度在2 - 7月呈相似的增加趋势。Pearson相关分析和Redundancy分析表明，影响浮游植物群落的主要环境因子是水温、透明度和营养盐浓度。关键水鸟区与浮游植物生物量呈正相关关系，表明越冬水鸟粪便对升金湖上湖浮游植物群落有重要影响。
Temporal and spatial variations in the phytoplankton community and environmental variables were investigated from February to July 2014, in the upper lake of Shengjin Lake, China. We identified 192 species of phytoplankton belonging to 8 phyla and 84 genera, of which 46.4 % of Chlorophyta, 29.2 % of Bacillariophyta, and 12.5 % of Cyanophyta. There were 14 predominant species. Marked temporal and spatial variations were observed in the phytoplankton community. The total abundance of phytoplankton ranged from 3.66 × 105to 867.93 × 105cells/L and total biomass ranging from 0.40 to 20.89 mg/L. The Shannon-Wiener diversity index varied from 3.50 to 8.35 with an average of 5.58, revealing high biodiversity in the phytoplankton community. There were substantial temporal changes in the dominant species, from Bacillariophyta and Cryptophyta to Cyanophyta and Chlorophyta. Phytoplankton biomass and abundance showed a similar increasing trend from February to July. Pearson correlations and Redundancy analysis revealed that the most significant environmental factors influencing phytoplankton community were water temperature (T), transparency (SD), and nutrient concentration. The positive correlation between the key water bird areas and phytoplankton biomass indicated that the droppings of wintering water birds had an important influence on the phytoplankton community in the upper lake of Shengjin Lake.