| 西藏巴松错（湖）夏季浮游植物群落的水平和垂直分布 |
| Horizontal and Vertical Distributions of the Summer Phytoplankton Community in Basomtso Lake of Xizang, China |
| 投稿时间：2021-12-17 修订日期：2022-02-13 |
| DOI：10.15928/j.1674-3075.202112170415 |
| 中文关键词:巴松错 浮游植物 群落结构 水平分布 垂直分布 |
| 英文关键词:Basomtso Lake phytoplankton community structure horizontal distribution vertical distribution |
| 基金项目:国家自然科学基金（32070418，31660620）；西藏大学培育基金（ZDQMJH19-34）；2022?年中央财政支持地方高校改革发展专项资金?(藏财预指［2022］1号) |
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| 中文摘要: |
| 揭示西藏巴松错浮游植物群落结构的水平和垂直分布特征及其与环境间的关系，为进一步研究高寒湖泊生态系统提供基础资料。于2020年7月对巴松错出入河流及其湖体15个采样点和湖中心B15采样点11个分层的浮游植物进行了调查，同时测定了水体相关理化指标。调查共采集水样275个，分析了浮游植物物种组成、细胞丰度、生物量和物种多样性等群落结构特征，并探讨浮游植物对水平和垂直环境梯度变化的响应。结果表明：（1）巴松错夏季共鉴定浮游植物167种，隶属于5门8纲20目29科66属，物种组成为硅藻-绿藻-蓝藻型；（2）在水平方向上，平均细胞丰度为1.8453×104 cells/L，平均生物量为0.0117 mg/L；在垂直方向上，平均细胞丰度为1.0055×104 cells/L，平均生物量为0.0061 mg/L；（3）巴松错夏季浮游植物群落结构水平分布较为均匀，群落复杂程度相对较高，较垂直分布更稳定；（4）RDA分析结果表明，EC是影响巴松错夏季浮游植物水平群落变异的主要环境因子，TUR是影响垂直变异的主要环境因子。 |
| 英文摘要: |
| In this study, we explored the horizontal and vertical distributions of the phytoplankton community and its relationship with environmental factors in Basomtso Lake of Tibet, aiming to provide basic data for the further study of plateau lake ecosystems. In July 2020, horizontal water samples were collected at 15 sampling sites (B1-15) and vertical samples were collected at 11 depths at B15, the sampling site near the center of Basomtso Lake. Physical and chemical parameters of the lake water were also measured. A total of 275 water samples were collected for phytoplankton analysis, focusing on species composition, cell abundance and biomass, and species diversity. The response of phytoplankton to changes in horizontal and vertical environmental gradients were analyzed by redundancy analysis (RDA). Results show that: (1) A total of 167 phytoplankton species from 66 genera, 29 families, 20 orders, 8 classes and 5 phyla were identified, with dominance by bacillariophyta-chlorophyta-cyanophyta. Species richness of the horizontal distribution was higher than that of the vertical distribution. (2) Horizontally, the average cell abundance and biomass were 1.845×104 cells/L and 0.012 mg/L, and vertically, the average cell abundance and biomass were 1.006×104 cells/L and 0.006 mg/L. (3) The Margalef richness, Simpson dominance, Shannon-Wiener diversity and Pielou evenness indices of the summer phytoplankton communityin the horizontal distribution were all higher than those of the phytoplankton community in the vertical distribution. These indices show that the horizontal distribution was more uniform, and that community complexity and stability were higher than in the vertical distribution. (4) RDA analysis showed that electrical conductivity (EC) was the primary environmental factor associated with the horizontal distribution of phytoplankton, and turbidity (TUR) was the primary environmental factor associated with the vertical distribution of phytoplankton in Basomtso Lake. The results of this study provide basic data for further study of alpine lake ecosystems. |
| 刘洋,安瑞志,王陈,潘成梅,巴桑.2023.西藏巴松错（湖）夏季浮游植物群落的水平和垂直分布[J].水生态学杂志,44(6):104-112. |
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