Alterations in soil fungal community composition and network assemblage structure by different long-term fertilization regimes are correlated to the soil ionome

文献类型： 外文期刊

第一作者： Xue, Chao

作者： Xue, Chao;Zhu, Chen;Guo, Shiwei;Ling, Ning;Shen, Qirong;Penton, C. Ryan;Chen, Huan;Duan, Yinghua;Peng, Chang

作者机构：

关键词： Chemical fertilizer;Organic amendment;Soil ionome;Soil fungal community;Co-occurrence network

期刊名称：BIOLOGY AND FERTILITY OF SOILS （ 影响因子：6.432； 五年影响因子：6.332 ）

ISSN： 0178-2762

年卷期： 2018 年 54 卷 1 期

页码：

收录情况： SCI

摘要： Agricultural soils with (M+) or without (M-) organic amendment were collected from four long-term field experiments to investigate soil fungal community composition and its relationship to the soil ionome by employing both the sequencing of fungal internal transcription spacer (ITS) fragments and inductively coupled plasma mass spectrometry (ICP-MS). Fungal community composition was primarily impacted by physical location while organic amendment triggered community shifts in the same direction in all four sites. Overall, the fungal community was strongly correlated to soil pH that, conversely, impacted soil ion availability. Fungal community dissimilarity was strongly correlated to soil ionome (ionic profile) variability. Network analysis has been conducted to explore the biotic interactions in soil ecosystem, in which species (nodes) are connected by pairwise interactions (links). The results revealed that organic amendment led to a higher number of correlated nodes to soil ions, links, modules (a group of nodes more densely connected to each other than to nodes outside the group), and positive links within and between modules. Moreover, specific fungal modules were independently correlated with soil ions, suggesting that each module represents a functional guild or collection of similar fungal ecotypes. Module size (number of nodes in a module) exhibited no apparent influence on the scale of these correlations. The increase in cooperative/synergistic interactions with organic amendment suggests that application results in a better-organized and more efficient community with enhanced potential soil fungal interactions mediated by alterations in the soil ionome. Overall, this study indicates that these less commonly measured soil ions play an important role and may be used to reveal previously undetermined drivers of the soil microbial community.

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