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

姚植; 朱蓉; 何桂豪; 刘奕杰; 杨文焕; 孙涛; 冯栋栋; 李卫平

引用本文:	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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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
姚植¹, 朱蓉², 何桂豪¹, 刘奕杰², 杨文焕¹, 孙涛³, 冯栋栋¹, 李卫平¹
1.内蒙古科技大学;2.中冶西北工程技术有限公司包头;3.德州市水利局

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：

分类号:X524

基金项目:

Niche analysis of dominant species of phytoplankton in lakes in cold and arid region——A case study of Baotou Nanhai Lake

YAO Zhi¹, ZHU Rong², HE Guihao¹, LIU Yijie², YANG Wenhuan¹, SUN Tao³, Feng Dongdong¹, LI Weiping¹

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

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