| 鄱阳湖湿地不同环境条件土壤AM真菌群落特征及其影响因素 |
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| 引用本文： | 王金平,袁继红,任琼,周莉荫,缪泸君,万方,徐盛丁,万松贤.鄱阳湖湿地不同环境条件土壤AM真菌群落特征及其影响因素[J].水土保持学报,2023,37(5):252-258. |
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| 作者姓名： | 王金平 袁继红 任琼 周莉荫 缪泸君 万方 徐盛丁 万松贤 |
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| 作者单位： | 1. 南昌工程学院, 南昌 330099;2. 江西省林业科学院, 南昌 330032;3. 南昌市城市规划设计研究总院, 南昌 330013;4. 江西鄱阳湖南矶湿地国家级自然保护区管理局, 南昌 330038 |
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| 基金项目： | 江西省林业科学院博士后项目(2020522302)；江西省林业科学院博士启动项目(2020522301)；2021年中央财政湿地保护与恢复补助重要湿地生态状况监测评价项目(赣林函字[2022]79号)；江西省林业局林业科技创新专项([2021]06号)；江西省林业科学院基础研究与人才科研专项(2022511601) |
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| 摘 要： | 丛枝菌根(AM)真菌可以与湿地植物共生，并在湿地生态系统的修复与维护过程中具有重要作用。然而，不同环境条件下湿地土壤AM真菌群落分布特征及其影响因素仍然有待明晰。选择鄱阳湖湿地不同水位条件(高水位和低水位)2种典型植物群落(南荻和水蓼)为研究对象，运用高通量测序技术探究水位和植被类型对鄱阳湖湿地土壤AM真菌群落结构和多样性的影响，比较不同环境条件下AM真菌群落结构和多样性差异，分析其与土壤理化性质的关系。结果表明，AM真菌OTU数为21～38,水位和植被类型影响鄱阳湖湿地土壤AM真菌OTU数，高水位下AM真菌OTU数高于低水位，水蓼群落高于南荻群落。被鉴别出的菌属为Glomus、Claroideoglomus和Paraglomus,其中，Glomus是优势属，占比85%以上，其相对丰度在高水位下显著高于低水位(p<0.05),南荻群落高于水蓼群落。AM真菌多样性指数(Simpson和Shannon指数)受水位和植被类型以及二者交互影响(p<0.01),低水位下不同群落之间的AM真菌多样性指数无显著差异，而高水位下水蓼群落AM真菌多样性指数显著高于南荻群落(p<0.05...
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| 关 键 词： | 湿地 丛枝菌根真菌群落 水位 植被类型 土壤环境因子 |
| 收稿时间： | 2023/2/7 0:00:00 |
Characteristics and Influencing Factors of Soil Arbuscular Mycorrhizal Fungi Community Under Different Environmental Conditions in Poyang Lake Wetland |
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| WANG Jinping,YUAN Jihong,REN Qiong,ZHOU Liyin,MIAO Lujun,WAN Fang,XU Shengding,WAN Songxian.Characteristics and Influencing Factors of Soil Arbuscular Mycorrhizal Fungi Community Under Different Environmental Conditions in Poyang Lake Wetland[J].Journal of Soil and Water Conservation,2023,37(5):252-258. |
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| Authors: | WANG Jinping YUAN Jihong REN Qiong ZHOU Liyin MIAO Lujun WAN Fang XU Shengding WAN Songxian |
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| Affiliation: | 1. Nanchang Institute of Technology, Nanchang 330099;2. Jiangxi Academy of Forestry, Nanchang 330032;3. Nanchang Urban Planning and Design Institute, Nanchang 330013;4. Nanji Wetland National Nature Reserve Agency, Nanchang 330038 |
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| Abstract: | Arbuscular mycorrhizal (AM) fungi can coexist with wetland plants and play an important role in the restoration and maintenance of wetland ecosystem. However, the distribution and influencing factors of soil AM fungal community under different environmental conditions in wetland ecosystem still need to be clarified. Therefore, this study used high-throughput sequencing technology to explore the effects of water level and vegetation type on the community structure and diversity of soil AM fungi in Poyang Lake wetland. Two typical plant communities (Triarrhena lutarioriparia and Persicaria hydropiper) under different water levels (high and low water level) were chosen to compare the difference of the community structure and diversity of AM fungi among different environmental conditions. The relationship between AM fungal community and soil physicochemical properties was analyzed. The results showed that the OTU number of AM fungi ranged from 21 to 38. Both water level and vegetation type affected the OTU number of AM fungi in Poyang Lake wetland. The OTU number of AM fungi was higher under high water level than that under low water level, and it was higher in P. hydropiper community than that in T. lutarioriparia community. The identified genera of AM fungi were Glomus, Claroidoglomus and Paraglomus. Among them, Glomus was the dominant genus, accounting for more than 85%. And the relative abundance of Glomus was significantly higher under high water level, compared with low water level, while it was significantly higher in T. lutarioriparia community, compared with P. hydropiper community (p<0.05). The AM fungal diversity indices (Simpson and Shannon index) were affected by water level, vegetation type and their interaction (p<0.01). Under low water level, there was no significant difference in AM fungal diversity indices between different communities, but under high water level, the AM fungal diversity indices in P. hydropiper community was significantly higher than that in T. lutarioriparia community (p<0.05). Water level had a higher effect on community structure of soil AM fungi than that of vegetation type, and vegetation type significantly affected AM fungal community structure only at low water level. Correlation analysis showed that there was no significant relationship between AM fungal diversity indices (Shannon and Simpson index) and soil factors. Dominant genera Glomus and OTU number were significantly and negatively correlated with soil water content at low water level (p<0.05), while Glomus was significantly and positively correlated with soil pH at high water level (p<0.05). Hence, there was a threshold effect of soil water content on Glomus in wetland ecosystem. The results of the present study could provide scientific guidance for the restoration of degraded wetland ecosystem. |
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| Keywords: | wetland AM fungal community water level vegetation type soil environmental factor |
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