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| Effects of fertilizer on functional traits and gut bacterial co-occurrence network and assembly mechanism of the soil Entomobrya proxima Folsom |
| Received:September 12, 2024 |
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| KeyWord:fertilizer;Entomobrya proxima Folsom;functional trait;gut bacterial community;network co-occurrence;community assembly mechanism |
| Author Name | Affiliation | E-mail | | YANG Xinyue | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | LI Gang | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | ligang06@caas.cn | | XIU Weiming | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | xiuweiming@caas.cn |
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| Abstract: |
| In order to investigate the effects of fertilizer application on functional traits, gut bacterial co-occurrence network, and assembly mechanism in collembolan. Entomobrya proxima Folsom as an abundant soil-dwelling species in North China was selected in the study. Dietary exposure was employed to simulate scenarios of fertilizer application. Microscopic observation, qPCR, and high-throughput sequencing technology were utilized to assess changes in functional traits and gut microbiota of Entomobrya proxima under fertilizer application. By integrating multivariate statistical methods, the co-occurrence patterns and community assembly mechanism of gut bacteria were analyzed. The results showed that fertilizer application significantly influenced functional traits and gut bacterial abundance in Entomobrya proxima. The gut bacterial community could resist the stress of organic fertilizer by increasing the complexity of network, and reduce the disturbance of inorganic fertilizer to the whole network by increasing the modularity. There was a significant negative correlation between the functional traits of Entomobrya proxima and the relative abundance changes of Bdellovibrionota and Myxococcota in their gutbacterial community. Random processes played a predominant role in shaping gut bacterial community in Entomobrya proxima. The application of fertilizer resulted in a reduction of heterogeneous selection ' s role, increased the importance of drift. The niche width of the gut bacterial community associated with Entomobrya proxima was significantly affected by inorganic fertilizer. Overall, fertilizer application had adverse effects on the functional traits in Entomobrya proxima, altered gut bacterial abundance, co-occurrence network patterns and community assembly mechanism. In comparison to inorganic fertilizer, organic fertilizer exerted less impact on the Entomobrya proxima. This suggests that organic fertilizer is more conducive to agricultural sustainability and biodiversity conservation. |
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