水文连通性对鄱阳湖碟形湖微生物群落结构的影响

折远洋; 王鹏; 丁明军; 张华; 曾欢; 聂明华; 黄高翔

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (6) : 3256-3267.

环境生态

水文连通性对鄱阳湖碟形湖微生物群落结构的影响

折远洋^1,2, 王鹏¹, 丁明军¹, 张华¹, 曾欢¹, 聂明华¹, 黄高翔¹

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Influence of hydrological connectivity on the microbial community structure in sub-lakes of Poyang Lake

SHE Yuan-yang^1,2, WANG Peng¹, DING Ming-jun¹, ZHANG Hua¹, ZENG Huan¹, NIE Ming-hua¹, HUANG Gao-xiang¹

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摘要

在鄱阳湖典型湿地10个碟形湖进行水体细菌、沉积物细菌和真菌样品采集分析,构建了碟形湖水文连通性指标体系,以期定量分析水文连通性对微生物群落结构的影响程度.结果表明:水体细菌、沉积物细菌和真菌群落α多样性枯水初、中和后期存在显著差异,其中沉积物细菌和真菌群落枯水中期更高; 随着水文连通性的升高,水体细菌α多样性呈下降趋势,沉积物细菌和真菌在中水文连通性下α多样性较高.水体细菌群落β多样性在不同时期差异更明显,沉积物细菌和真菌群落β多样性在空间上差异更明显.湖水面积比(WSP)和水深(WD)是影响水体细菌群落结构的主要水文连通性变量.湖盆高程(LE)和WD是影响沉积物细菌和真菌的主要水文连通性变量.水文连通性对水体细菌群落结构解释率(7.6%)低于对沉积物细菌和真菌群落结构解释率(分别为33.3%和29.7%).其中水文连通性与理化因子对水体细菌群落结构交互解释率为2.4%,对沉积物细菌和真菌群落结构交互解释率分别为9.7%和6.2%.沉积物细菌和真菌分别以随机性和确定性过程主导,水体细菌受确定性和随机性共同主导.中等水文连通性碟形湖水体细菌群落随机性构建过程更强;沉积物细菌和真菌群落构建随着水文连通性的增强,随机性构建过程减弱.

Abstract

This study involved the collection and analysis of bacteria and fungi samples in water and sediment from ten typical sub-lakes of Poyang Lake. A hydrological connectivity index system for sub-lakes was established to quantitatively assess the effect of hydrological connectivity on microbial community structure. The results indicate significant differences in the α-diversity of water bacteria, sediment bacteria, and fungal communities during different stages of the dry season, sediment bacteria and fungi showed higher α-diversity during the mid-dry season. The difference in β diversity of water bacterial community was more obvious in different periods, and the β diversity of sediment bacterial and fungal communities showed spatial differences. With the increase of hydrological connectivity, the similarity of sediment bacterial and fungal communities was lower. The water area ratio (WSP) and water depth (WD) were the main hydrological connectivity variables affecting the water bacterial community structure. Lake basin elevation (LE) and WD were the main hydrological connectivity variables affecting sediment bacteria and fungi community structure. Hydrological connectivity explained less variation in water bacterial community structure (7.6%) compared to sediment bacteria (33.3%) and fungal (29.7%) community structures. The co-interpretation rate of hydrological connectivity and physicochemical factors on bacterial community structure in water was only 2.4%, and the co-interpretation rates of bacterial and fungal community structure in sediments were 9.7% and 6.2%, respectively. Sediment bacterial and fungal communities were predominantly shaped by stochastic and deterministic processes, respectively, while both processes jointly influenced water bacterial communities. Under moderate hydrological connectivity, water bacterial communities showed stronger stochastic processes, whereas as connectivity increased, stochastic processes in sediment bacteria and fungi weakened.

导出引用

折远洋, 王鹏, 丁明军, 张华, 曾欢, 聂明华, 黄高翔. 水文连通性对鄱阳湖碟形湖微生物群落结构的影响[J]. 中国环境科学. 2025, 45(6): 3256-3267

SHE Yuan-yang, WANG Peng, DING Ming-jun, ZHANG Hua, ZENG Huan, NIE Ming-hua, HUANG Gao-xiang. Influence of hydrological connectivity on the microbial community structure in sub-lakes of Poyang Lake[J]. China Environmental Science. 2025, 45(6): 3256-3267

中图分类号： X172

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