Non-flooding conditions caused by water table drawdown alter microbial network complexity and decrease multifunctionality in alpine wetland soils

被引：5

作者：

Niu, Yuechuan ^{[1
,2
,4
]}

Kang, Enze ^{[2
,3
]}

Li, Yong ^{[1
,4
]}

Zhang, Xiaodong ^{[1
,4
]}

Yan, Zhongqing ^{[1
,4
]}

Li, Meng ^{[1
,4
]}

Yan, Liang ^{[1
,4
]}

Zhang, Kerou ^{[1
,4
]}

Wang, Xiaodong ^{[5
]}

Yang, Ao ^{[1
,4
]}

Yu, Xiaoshun ^{[1
,4
]}

Kang, Xiaoming ^{[1
,4
]}

Cui, Xiaoyong ^{[2
]}

机构：

[1] Chinese Acad Forestry, Wetland Res Ctr, Inst Ecol Conservat & Restorat, Beijing 100091, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China

[4] Tibetan Autonomous Prefecture Aba, Sichuan Zoige Wetland Ecosyst Res Stn, Zoige 624500, Peoples R China

[5] Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China

来源：

ENVIRONMENTAL RESEARCH | 2024年 / 254卷

基金：

中国国家自然科学基金;

关键词：

Water table drawdown; Soil multifunctionality; Microbial community; Microbial diversity; Alpine wetland; ECOSYSTEM MULTIFUNCTIONALITY; COMMUNITY STRUCTURE; CLIMATE-CHANGE; REDUNDANCY; RESISTANCE; GRADIENT; IMPACTS; DROUGHT; LEVEL;

D O I：

10.1016/j.envres.2024.119152

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Several soil functions of alpine wetland depend on microbial communities, including carbon storage and nutrient cycling, and soil microbes are highly sensitive to hydrological conditions. Wetland degradation is often accompanied by a decline in water table. With the water table drawdown, the effects of microbial network complexity on various soil functions remain insufficiently understood. In this research, we quantified soil multifunctionality of flooded and non-flooded sites in the Lalu Wetland on the Tibetan Plateau. We employed highthroughput sequencing to investigate the microbial community responses to water table depth changes, as well as the relationships between microbial network properties and soil multifunctionality. Our findings revealed a substantial reduction in soil multifunctionality at both surface and subsurface soil layers (0-20 cm and 20-40 cm) in non-flooded sites compared to flooded sites. The alpha-diversity of bacteria in the surface soil of non-flooded sites was significantly lower than that in flooded sites. Microbial network properties (including the number of nodes, number of edges, average degree, density, and modularity of co-occurrence networks) exhibited significant correlations with soil multifunctionality. This study underscores the adverse impact of non-flooded conditions resulting from water table drawdown on soil multifunctionality in alpine wetland soils, driven by alterations in microbial community structure. Additionally, we identified soil pH and moisture content as pivotal abiotic factors influencing soil multifunctionality, with microbial network complexity emerging as a valuable predictor of multifunctionality.

引用

页数：10