| 引用本文: | 杨文焕,梁俊泓,李艳芳,张明宇,王志超,李卫平.寒区湖泊冰封期与非冰封期蓝藻群落特征分析.湖泊科学,2025,37(1):61-77. DOI:10.18307/2025.0113 |
| Yang Wenhuan,Liang Junhong,Li Yanfang,Zhang Mingyu,Wang Zhichao,Li Weiping.Cyanobacterial community characteristics during ice-covered and non-ice-covered periods in lakes of cold regions. J. Lake Sci.2025,37(1):61-77. DOI:10.18307/2025.0113 |
|
| 摘要: |
| 以蓝藻越冬的群落变化特征为基础，为揭示不同湖泊水生态变化，于2022年1月和7月在岱海、乌梁素海和南海湖共选取10个采样点采集上层水与底泥样品，开展了内蒙湖区不同类型湖泊冰封与非冰封时期蓝藻群落结构、丰度变化和多样性的研究。结果表明：蓝藻经历了湖泊冰封期与非冰封期，丰度和多样性都发生了较大变化，可以很好地解释湖泊水生态变化情况，乌梁素海和南海湖非冰封期蓝藻丰度显著高于冰封期，而岱海因其湖泊水质的特殊性，冰封期水体蓝藻丰度显著高于非冰封期水体，而非冰封期底泥蓝藻丰度显著高于冰封期。不同时期不同湖泊蓝藻优势属的生态位宽度不尽相同，非冰封期和冰封期岱海和南海湖优势蓝藻普遍可利用多种资源，而乌梁素海优势蓝藻实际可利用资源较少。根据中性模型和冗余分析可知，非冰封期的乌梁素海和南海湖水体和底泥更多地受到随机过程的影响，相比之下，岱海底泥和南海湖水体则更多地受环境因素的制约；寒区湖泊蓝藻群落的组成、结构及影响因素存在季节差异，水温、总氮、氨氮和pH起到了关键作用。研究结果可为寒区湖泊水生态保护治理提供参考。 |
| 关键词: 寒区湖泊 蓝藻 群落结构 生态位 迁移 |
| DOI：10.18307/2025.0113 |
| 分类号: |
| 基金项目:国家自然科学基金项目（42167018）资助 |
|
| Cyanobacterial community characteristics during ice-covered and non-ice-covered periods in lakes of cold regions |
|
Yang Wenhuan1，2，Liang Junhong1，Li Yanfang1，Zhang Mingyu1，Wang Zhichao1，2，Li Weiping1，2
|
|
1.College of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010 , P.R.China ；2.Autonomous Region Level Ecological Protection and Comprehensive Utilization Cooperative Innovation Center for the Inner Mongolia Section of the Yellow River Basin, Baotou 014010 , P.R.China
|
| Abstract: |
| Based on the community change of overwintering cyanobacteria, this study aimed to elucidate ecological changes in different lakes. A sampling program was conducted at 10 sampling sites in Lake Daihai, Lake Wuliangsuhai, and Lake Nanhai in January and July 2022, with samples from the upper water and sediment. These samples were used to investigate the community structure, abundance variations, and diversity of cyanobacteria in various types of lakes in the Inner Mongolia lake region during both the ice-covered and non-ice-covered periods. The results showed large variation in the abundance and diversity of cyanobacteria between the ice-covered and non-ice-covered periods of lakes, providing a good explanation for the ecological changes. During the non-ice-covered period, the abundance of cyanobacteria in Lake Wuliangsuhai and Lake Nanhai was significantly higher than that during the ice-covered period. Conversely, in Lake Daihai, the abundance of cyanobacteria in water was significantly higher during the ice-covered period than that during the non-ice-covered period, attributed to the unique water quality of the lake, and the abundance of cyanobacteria in the sediment during the non-ice-covered period was significantly higher than that during the ice-covered period. Additionally, the ecological niche widths of the dominant genera in different lakes varied across periods. Specifically, the dominant cyanobacteria in Lake Daihai and Lake Nanhai were generally able to utilize a diverse range of resources during both the non-ice-covered and ice-covered periods, whereas the dominant cyanobacteria in Lake Wuliangsuhai had fewer resources readily available to them. Based on neutral modeling and redundancy analysis, it is clear that during the non-ice-covered period, the water bodies and sediments of Lake Wuliangsuhai and Lake Nanhai were significantly influenced by stochastic processes. In contrast, the sediments of Lake Daihai and the water of Lake Nanhai were more constrained by environmental factors. Additionally, there were seasonal variations in the composition and structure of cyanobacterial communities in cold-region lakes, with the main driving factors of water temperature, total nitrogen, ammonia nitrogen and pH. This study can serve as a valuable reference for the protection and management of lake ecology in cold regions. |
| Key words: Lakes of cold regions cyanobacteria community structure ecological niche transfer |
