<br>先锋植物通过在废弃稀土尾矿自然演替过程中重塑地下多营养群落来增强土壤多功能性,Journal of Hazardous Materials

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先锋植物通过在废弃稀土尾矿自然演替过程中重塑地下多营养群落来增强土壤多功能性
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2024-04-26 , DOI: 10.1016/j.jhazmat.2024.134450
Wenxing Li ₁ , Erkai He ₂ , Cornelis A M Van Gestel ₃ , Willie J G M Peijnenburg ₄ , Guangquan Chen ₅ , Xiaorui Liu ₆ , Dong Zhu ₇ , Hao Qiu ₈

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金属尾矿的自发自然演替是裸露尾矿恢复的基础。在这里，选择了具有不同功能性状的先锋植物自发定殖的废弃稀土元素（REE）尾矿。研究了土壤养分循环、肥力、有机质分解以及地下生物群落及其多营养网络。与裸尾矿相比，定殖、、和的土壤多功能性分别提高了 222%、293% 和 525%。伴随着土壤细菌和原生生物群落组成的显着变化以及土壤多营养网络复杂性的增加。与裸尾矿相比，不同植物物种的根际表现出不同的微生物群落组成。一些、、和主要存在于裸尾矿中，而一些和主要出现在根际。皮尔逊相关和随机森林揭示了驱动土壤多功能的生物因素。结构方程模型进一步揭示，先驱植物主要通过减少微生物多样性和增加多营养网络复杂性来改善土壤多功能性。总体而言，这凸显了地下生物在自然演替过程中加速土壤恢复的重要性，并为退化稀土矿区的生态恢复提供了选择。

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Pioneer plants enhance soil multifunctionality by reshaping underground multitrophic community during natural succession of an abandoned rare earth mine tailing

Spontaneous natural succession in metal mine tailings is fundamental to the rehabilitation of bare tailing. Here, an abandoned rare earth element (REE) mine tailing with spontaneous colonisation by pioneer plants with different functional traits was selected. Soil nutrient cycling, fertility, organic matter decomposition as well as underground organismal communities and their multitrophic networks were investigated. Compared with the bare tailing, the colonisation with , , and increased soil multifunction by 222%, 293%, and 525%, respectively. This was accompanied by significant changes in soil bacterial and protistan community composition and increased soil multitrophic network complexity. Rhizospheres of different plant species showed distinct microbial community composition compared to that of bare tailing. Some , , and were mainly present in the bare tailing, while some and were predominantly seen in the rhizosphere. Pearson correlation and Random Forest revealed the biotic factors driving soil multifunction. Structural equation modelling further revealed that pioneer plants improved soil multifunction primarily by decreasing the microbial biodiversity and increasing the multitrophic network complexity. Overall, this highlights the importance of subterrestrial organisms in accelerating soil rehabilitation during natural succession and provides options for the ecological restoration of degraded REE mining areas.

更新日期：2024-04-26

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