| Cite this article: | 姚植,朱蓉,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,0,():-. |
| YAO Zhi,ZHU Rong,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,0,():-. |
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| Niche analysis of dominant species of phytoplankton in lakes in cold and arid region——A case study of Baotou Nanhai Lake |
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YAO Zhi1, ZHU Rong2, HE Guihao1, LIU Yijie2, YANG Wenhuan1, SUN Tao3, Feng Dongdong1, LI Weiping1
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1.Inner Mongolia University of Science and Technology;2.Northwest Engineering and Research Incorporation Limited of China Metallurgical Group;3.Dezhou Municipal Water Resources Bureau
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| Abstract: |
| 【Objective】Clarify the response relationship between phytoplankton community changes and lake eutrophication in cold and arid region lakes.【Method】Through sampling and counting the water and phytoplankton community of Nanhai Lake from December 2017 to November 2018, the ecological breadth and ecological overlap of dominant phytoplankton species were described by niche analysis method, and the effects of water environmental factors on phytoplankton were determined by grey relational analysis.【Result】The results showed that phytoplankton species were detected in 7 phyla,38 genera,95 species in frozen period and 7 phyla,47 genera,106 species in unfrozen period. The main phytoplankton community comprised of cyanobacteria-green algae-diatom. The niche breadth and niche overlap of the dominant species in the frozen period were both smaller than those in the unfrozen period, and the competition ability of phytoplankton is stronger in unfrozen period, and it can make full use of various resources. The gray correlation analysis showed that Chemical Oxygen Demand(CODCr)and pH had a strong correlation with phytoplankton density in all year, Total Phosphorus(TP)had a greater impact on the changes in phytoplankton population in the frozen period, while WT had a greater impact on the phytoplankton population change in the unfrozen period.【Conclusion】The species of phytoplankton in Nanhai Lake are affected by a variety of ecological factors at different stages. Organic pollutants and phosphorus nutrients are the main environmental factors affecting the structure of phytoplankton community. The results can provide a basis for the mechanism of phytoplankton structure change in cold and arid regions lakes. |
| Key words: cold-arid area;niche;phytoplankton;grey relation analysis;urban lake |
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