| 引用本文: | 谭好臣,王瑗媛,陈阳亮,刘国祥,刘本文.多水源水库浮游植物优势种生态位及种间联结性动态分析:以山东峡山水库为例.湖泊科学,2023,35(3):844-853. DOI:10.18307/2023.0308 |
| Tan Haochen,Wang Yuanyuan,Chen Yangliang,Liu Guoxiang,Liu Benwen.Dynamic analysis of niche and interspecific association of dominant phytoplankton species in Xiashan Reservoir. J. Lake Sci.2023,35(3):844-853. DOI:10.18307/2023.0308 |
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| 摘要: |
| 为了解山东省战略水源地峡山水库在多水源（本地湖库水、长江水及黄河水）共存条件下，浮游植物优势种生态位季节变化和群落结构稳定性状况，于2019年对峡山水库10个代表样点进行浮游植物季度采样，并运用生态位宽度、生态位重叠值、方差比率法、卡方检验及联结系数对优势种生态位及种间关联性进行分析。结果显示，峡山水库四个季度共鉴定到浮游植物7门78属95种，其中优势种4门12属12种，除春季外，其他三季均以蓝藻类群为绝对优势，其中赖氏泽丝藻（Limnothrix redekei）、阿氏浮丝藻（Planktothrix agardhii）以及项圈假鱼腥藻（Pseudanabaena moniliformis）为全年优势种。多样性指数显示出较为一致的趋势，即春季浮游植物多样性较高，夏季多样性最低。优势种生态位宽度差异较大，变化范围在0.526~2.224，最大值、最小值分别为秋季的项圈假鱼腥藻和春季的小金色藻（Chromulina sp.）。项圈假鱼腥藻在多个季节具有最大的生态位宽度及较强的适应多样化生境的能力。生态位重叠显示项圈假鱼腥藻与其他多个优势蓝藻在不同季节具有最大的生态位重叠值，且其是唯一一个在春、夏和秋三季处于衰退期，而在冬季迅速发展的优势蓝藻。四个季度优势种总体关联性差异较为明显，群落结构不稳定。卡方检验显示76%的物种对为显著正联结关系，形成以项圈假鱼腥藻为主导，与其他优势蓝藻共同占有同一资源和空间的稳定演替模式。建议水库管理及调水除关注夏秋季可能的藻华外，还需密切关注低温季节藻类的异常增殖，尤其是冬季的项圈假鱼腥藻。研究可为胶东调水工程相关水库的水华预警和多水源调度提供理论依据和数据支撑。 |
| 关键词: 峡山水库 浮游植物 优势种 生态位 种间联结性 |
| DOI：10.18307/2023.0308 |
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| 基金项目:国家自然科学基金项目（32000168）和中国博士后科学基金项目（2019M662748）联合资助。 |
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| Dynamic analysis of niche and interspecific association of dominant phytoplankton species in Xiashan Reservoir |
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Tan Haochen1, Wang Yuanyuan1, Chen Yangliang2, Liu Guoxiang2, Liu Benwen2
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1.Weifang Xiashan Reservoir Management Service Center, Weifang 261325, P. R. China;2.Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China
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| Abstract: |
| In order to understand the seasonal changes of niche and community structure stability of dominant species of phytoplankton under the coexistence of multiple water sources (local reservoir water, Yangtze River water, and Yellow River water) in the Xiashan Reservoir, the strategic water source of the Shandong Province, this study conducted the quarterly sampling of phytoplankton at 10 representative sampling sites of Xiashan Reservoir in 2019. Niche breadth, niche overlap, variance ratio method, Chi-square test and association coefficient were used to analyze the niche and interspecific associations of dominant species. The results showed that a total of 7 phyla, 78 genera and 95 species of phytoplankton were identified in Xiashan Reservoir, of which 4 phyla, 12 genera and 12 species were the dominant species. Phytoplankton in all seasons were dominated by Cyanobacteria except for spring. Limnothrix redekei, Planktothrix agardhii and Pseudanabaena moniliformis were the dominant species throughout the year. The diversity index showed a more consistent trend, with higher phytoplankton diversity in spring and the lowest diversity in summer. The niche breadths of dominant species varied greatly, ranging from 0.526 to 2.224, with the maximum and minimum values in Pseudanabaena moniliformis in autumn and Chromulina sp. in spring, respectively. Pseudanabaena moniliformis had the largest niche breadth and strong ability to adapt to diverse habitats in many seasons. Niche overlap analysis showed that Pseudanabaena moniliformis and other dominant cyanobacteria had the largest niche overlap values in different seasons, and it was the only dominant cyanobacteria that declined in spring, summer and autumn but developed rapidly in winter. The overall correlation difference of dominant species in four quarter was more obvious, and the community structure was unstable. The Chi-square test showed that 76% of the species pairs had significant positive associations, forming a stable succession pattern that community structure was dominated by Pseudanabaena moniliformis, sharing the same resources and space with other dominant cyanobacteria. In addition to the possible algal blooms in summer and autumn, reservoir management and water transfer department should also pay close attention to the abnormal proliferation of some algae in low temperature seasons, especially the Pseudanabaena moniliformis in winter. This research can provide theoretical basis and data support for algal bloom early warning and multi-source dispatching of related reservoirs in Jiaodong Water Transfer Project. |
| Key words: Xiashan Reservoir phytoplankton dominant species niche interspecific association |
