数字农科院2.0

Long-term inorganic fertilizer exposure disturbed functional traits and gut bacterial conditionally rare or abundant taxa in collembolan (Entomobrya proxima Folsom)

文献类型： 外文期刊

作者： Yang, Xinyue;Li, Gang;Xiu, Weiming

作者机构：

关键词： collembolan;functional traits;intestinal bacterial community;AT;CRAT

期刊名称： SOIL ECOLOGY LETTERS

ISSN： 2662-2289

年卷期： 2025 年 7 卷 3 期

页码：

收录情况： CSCD（2025-2026年度） ; ; 农林核心（2024版） ; ; ESCI（2025版）

摘要： The inorganic fertilizer addition with a low amount promoted the elongation of some functional traits of Entomobrya proxima.The conditionally rare or abundant taxa were more susceptible to the disturbance of inorganic fertilizer than abundant taxa in the gut of Entomobrya proxima.Multiple dominant genera in the conditionally rare or abundant taxa have the potential to indicate the changes of functional traits of Entomobrya proxima.The functional traits of soil fauna are closely related to ecosystem functions. The gut microbiota, which can reflect environmental changes, may be associated with functional traits. Therefore, in this study, collembolan (Entomobrya proxima) was used to clarify the linkage response of specific gut taxa and traits under long-term urea exposure. A small amount of urea had positive effects on functional traits of E. proxima. Chao1 and Shannon indices of gut bacteria conditionally rare or abundant taxa (CRAT) gradually decreased under low and medium fertilizer, while increased under high fertilizer. Shannon index of abundant taxa (AT) showed a similar trend to that of CRAT except that the value of Shannon index was higher at high fertilizer than that of medium treatments. The structure and community assembly of CRAT changed significantly, and with the increase of urea addition amount, the dominant mechanism of community assembly changed from a deterministic process to a stochastic process. The niche width of AT and CRAT decreased. Relative abundance of some genera in AT and CRAT was closely related to functional traits. In conclusion, CRAT was more sensitive to urea than AT, had the potential to characterize functional traits of E. proxima, which will provide a basis for predicting the changes of soil animal traits and functions under the change of agricultural fertilizer strategy in the future.

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