Response of soil fungal-community structure and function to land conversion to agriculture in desert grassland

被引:0
作者
Kang, Peng [1 ]
Hu, Jinpeng [1 ,2 ]
Pan, Yaqing [3 ]
Qu, Xuan [1 ]
Ran, Yichao [1 ]
Yang, Chenxi [1 ]
Liu, Bingru [1 ]
机构
[1] North Minzu Univ, Sch Biol Sci & Engn, Yinchuan, Peoples R China
[2] Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou, Peoples R China
[3] Chinese Acad Sci, Northwest Inst Eco Environm & Resources, Shapotou Desert Res & Expt Stn, Lanzhou, Peoples R China
基金
中国国家自然科学基金;
关键词
desert grassland; land conversion; fungal community; network; functional groups; MICROBIAL COMMUNITIES; DIVERSITY; RECLAMATION; SCALE; SHIFT;
D O I
10.3389/fmicb.2024.1413973
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Land conversion to agriculture is an important factor affecting soil ecological processes in the desert grasslands of northern China. However, soil fungal-community structure and function in response to Land conversion remain unclear. In this study, desert grassland, artificial shrubland, and land conversion were investigated in the western part of the Mu Us Sandland (Yanchi, Ningxia; Dingbian, Shaanxi). We found that land conversion significantly increased soil total carbon, nitrogen, and phosphorus, and available phosphorous and potassium contents. In the early stage of conversion to agricultural (April), soil fungal operational taxonomic units and abundance-based coverage estimator were lower than those of dessert grasslands and shrubland plots and had significant correlations with pH, electric conductivity, and available phosphorus and potassium. The dominant phyla strongly correlated with soil physicochemical properties. Concomitantly, the relative abundance of Glomeromycota was significantly lower, and the complexity of the network in the land conversion plots was lower than that in the shrubland plots. In the late stage of land conversion (September), soil fungal operational taxonomic units and abundance-based coverage estimator were lower in the conversion plots than in the desert grassland plots, with more complex network relationships compared to the desert grassland or shrubland plots. Symbiotrophic groups, a functional group of desert grassland soil fungi, can be used as a predictor of environmental change; in addition, land conversion decreases the relative abundance of arbuscular mycorrhizal functional groups. Our study highlights the response of soil fungal communities and functions to human disturbances in desert grasslands. Considering the potential of land conversion to agriculture to influence soil secondary salinization, there is a need for continued observation of soil ecological health over the time continuum of land conversion to agriculture.
引用
收藏
页数:11
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