| 引用本文: | 姚 植,刘奕杰,何桂豪,等.寒旱区湖泊浮游植物优势种生态位分析—以包头南海湖为例[J].灌溉排水学报,2022,41(11):91-100. |
| YAO Zhi,LIU Yijie,HE Guihao,et al.寒旱区湖泊浮游植物优势种生态位分析—以包头南海湖为例[J].灌溉排水学报,2022,41(11):91-100. |
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| 摘要: |
| 【目的】明确寒旱区湖泊浮游植物群落变化与湖泊富营养化的响应关系。【方法】2017年12月—2018年11月对南海湖水体及浮游植物群落进行取样、计数，采用生态位分析方法对浮游植物优势种生态宽度和生态重叠进行描述，利用灰色关联分析确定水环境因子对浮游植物的作用。【结果】冰封期和非冰封期分别鉴定出浮游植物7门38属95种和7门47属106种，浮游植物主要群落结构为蓝藻-绿藻-硅藻型。冰封期优势种的生态宽度值和生态重叠值都比非冰封期小，非冰封期浮游植物的竞争能力更强。灰色关联分析显示，化学需氧量（CODCr）、酸碱度（pH）与全年浮游植物丰度均表现出较为显著的相关性，总磷（TP）对冰封期的浮游植物种群变化影响较大；而水温（WT）对非冰封期浮游植物种群变化影响比较大。【结论】南海湖浮游植物种类在不同阶段受到多种生态因素的影响，有机污染物和磷营养盐是影响浮游植物群落结构的主要环境因子，研究结果可为寒旱区湖泊浮游植物结构特征变化机理提供依据。 |
| 关键词: 寒旱区；生态位；浮游植物；灰关联分析；城市湖泊 |
| DOI：10.13522/j.cnki.ggps.2022091 |
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| Niche Analysis of the Dominant Phytoplankton Species in Nanhai Lakes in Northwest China |
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YAO Zhi, LIU Yijie, HE Guihao, ZHU Rong, YANG Wenhuan,SUN Tao, FENG Dongdong, LI Weiping
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1. Inner Mongolia University of Science and Technology, Baotou 014010, China;
2. Northwest Engineering and Research Incorporation Limited of China Metallurgical Group, Baotou 014010, China;
3. Dezhou Municipal Water Resources Bureau, Dezhou 253041, China
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| Abstract: |
| 【Objective】Humanity and temperature are two factors affecting microbial communities not only in terrestrial systems but also in aquatic ecosystems. Taking Nanhai lake in cold-arid Baotou as an example, this paper analyzes the relationship between phytoplankton community and eutrophication in the lake.【Method】 Water samples were taken from December 2017 to November 2018 from the lake. Phytoplankton community in each sample was counted. The ecological breadth and overlap of the dominant phytoplankton species were described by the niche analysis method, from which we calculated the effect of water environmental factors on phytoplankton community using the grey relational analysis.【Result】The dominant phytoplankton species detected from the water samples were 7 phyla, 38 genera and 95 species during the frozen period, and 7 phyla, 47 genera, 106 species during the unfrozen period. The main phytoplankton community comprises cyanobacteria-green algae-diatom. The niche breadth and niche overlap of the dominant species during the frozen period were smaller than those during the unfrozen period, and the competition of phytoplankton for resources was strong during the unfrozen period. The gray correlation analysis showed that the chemical oxygen demand (COD) and pH of the water were strongly correlated with phytoplankton density. Total phosphorus (TP) had a great impact on change in the phytoplankton population during the frozen period, while water temperature impacts the phytoplankton population change during the unfrozen period more greatly. 【Conclusion】 The dominant phytoplankton species in the Nanhai Lake are affected by a variety of ecological factors and vary with time. Organic pollutants and phosphorus nutrients are the main factors affecting the phytoplankton community. |
| Key words: cold-arid area; niche; phytoplankton; grey relation analysis; urban lake |
