| 饶河浮游细菌群落多样性与生态网络特征 |
| 摘要点击 818 全文点击 94 投稿时间：2024-05-21 修订日期：2024-07-22 |
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| 中文关键词 浮游细菌 营养盐 重金属 抗生素 共存网络 |
| 英文关键词 planktonic bacteria nutrients heavy metal antibiotics co-existence network |
| 作者 | 单位 | E-mail | | 倪仁香 | 河海大学环境学院, 南京 210098
河海大学浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098 | 2574307869@qq.com | | 张波 | 河海大学环境学院, 南京 210098
河海大学浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098 | | | 高寒 | 河海大学环境学院, 南京 210098
河海大学浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098 | | | 张晶晶 | 河海大学环境学院, 南京 210098
河海大学浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098 | | | 王榕 | 河海大学环境学院, 南京 210098
河海大学浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098 | | | 陈娟 | 河海大学环境学院, 南京 210098
河海大学浅水湖泊综合治理与资源开发教育部重点实验室, 南京 210098 | chenjuanmn@hhu.edu.cn |
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| 中文摘要 |
| 浮游细菌在河流生态系统的物质循环和能量流动方面发挥着重要作用，然而目前对于多种压力源下河流浮游细菌群落的多样性和共存网络关系知之甚少. 以鄱阳湖经典入湖河流饶河为研究区域，探究了饶河入湖段及其支流昌江和乐安河水体中营养盐、重金属和抗生素对浮游细菌多样性和共存关系的影响. 结果表明，3个河段中浮游细菌群落结构存在显著差异，乐安河浮游细菌的alpha多样性显著低于昌江和入湖段. 饶河中浮游细菌优势门为变形菌门（Proteobacteria）、拟杆菌门（Bacteroidetes）和放线菌门（Actinobacteria）. 共存网络分析表明，入湖段浮游细菌的网络复杂性和关键物种相对丰度高于昌江和乐安河，表明入湖段浮游细菌具有较强的共存关系. 方差分解分析表明，营养盐和重金属是浮游细菌群落多样性和共存关系的主要驱动因素. 研究结果有利于认识多种压力源下河流浮游细菌群落特征，可为河流生态健康状况的预测和管理提供科学依据. |
| 英文摘要 |
| Planktonic bacteria play a vital role in the material cycling and energy flow of river ecosystems. However， little is known about the diversity and co-existence network relationship of riverine planktonic bacteria under multiple stressors. This study investigated the impact of nutrients， heavy metals， and antibiotics on the planktonic bacterial diversity and co-existence relationship in Raohe River， the classic river entering Poyang Lake， as well as its two tributaries， Changjiang and Le'an Rivers. The results showed that planktonic bacterial community structure varied significantly among the three river sections， and the alpha diversity of planktonic bacteria in Le'an River was significantly lower than that in Changjiang and the lake entry segment. The dominant planktonic bacterial phyla were Proteobacteria， Bacteroidetes， and Actinobacteria in Raohe River. The co-occurrence network analysis revealed that the network complexity and relative abundance of key species of planktonic bacteria in the lake entry segment were higher than those in Changjiang and Le'an River， indicating that the co-existence relationship of planktonic bacteria were stronger in the lake entry segment. A variance partitioning analysis indicated that nutrients and heavy metals were the main driving factors for the diversity and co-existence relationship of planktonic bacteria. The research results contribute to understanding the characteristics of riverine planktonic bacteria influenced by multiple stressors and provide a scientific basis for predicting and managing the ecological health of the river. |
