Soil salinization increases the stability of fungal not bacterial communities in the Taklamakan desert

文献类型： 外文期刊

第一作者： Lin, Litao

作者： Lin, Litao;Ruan, Zhiyong;Jing, Xin;Wang, Yugang;Feng, Wenting;Wang, Yugang;Wang, Yugang

作者机构：

关键词： community stability; soil salinization; diversity; fungi; modularity; desert ecosystem

期刊名称：SOIL ECOLOGY LETTERS （ 影响因子：4.0； 五年影响因子：4.1 ）

ISSN： 2662-2289

年卷期： 2023 年 5 卷 4 期

页码：

收录情况： SCI

摘要： center dot Bacterial richness declined but fungal richness increased under salinization.. Bacteria did not become interactively compact or facilitative under salinization. center dot Fungi exhibited more compartmentalized and competitive patterns under salinization. center dot Fungal stability showed steeper increases under salinization than bacterial stability. Soil salinization is a typical environmental challenge in arid regions worldwide. Salinity stress increases plant convergent adaptations and facilitative interactions and thus destabilizes communities. Soil bacteria and fungi have smaller body mass than plants and are often efficient against soil salinization, but how the stability of bacterial and fungal communities change with a wide range of soil salinity gradient remains unclear. Here, we assessed the interactions within both bacterial and fungal communities along a soil salinity gradient in the Taklamakan desert to examine (i) whether the stability of bacterial and fungal communities decreased with soil salinity, and (ii) the stability of which community decreased more with soil salinity, bacteria or fungi. Our results showed that the species richness of soil fungi increased but that of soil bacteria decreased with increasing salinity in topsoils. Fungal communities became more stable under soil salinization, with increasing compartmentalization (i.e., modularity) and proportion of competitions (i.e., negative:positive cohesion) as salinity increased. Bacterial communities exhibited no changes in modularity with increasing salinity and smaller increases in negative:positive cohesion under soil salinization compared to fungal communities. Our results suggest that, by altering interspecific interactions, soil salinization increases the stability of fungal not bacterial communities in extreme environments.

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