Deciphering how endogenous mangrove litterfall influences organic matters transformation driven by microbes in sediment with exogenous microplastics inputs,Journal of Hazardous Materials

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Deciphering how endogenous mangrove litterfall influences organic matters transformation driven by microbes in sediment with exogenous microplastics inputs
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2024-09-05 , DOI: 10.1016/j.jhazmat.2024.135763
Yu Xia ₁ , Shu Wang ₁ , Xinran Zhang ₁ , Faying Fu ₁ , Hui Deng ₂ , Yuanyuan Zhao ₁ , Huamei Yu ₁ , Chengjun Ge ₂

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The effects of endogenous mangrove litterfall (MF) inputs on organic matter transformation in sediment polluted by exogenous microplastics (MPs) were investigated in this work, and their linkage with microbial characteristics was also explored. MF inputs significantly affected organic carbon transformation in MPs-polluted sediment by improving humification, enzymatic activities and carbon utilisation capacity of microbes. Such effects were mainly linked with the enrichment of microbes responsible for organic substance decomposition induced by MF inputs. Indeed, MF addition increased the relative abundance of fermentation- and cellulysis-assoicated bacteria, together with Saprotrophic fungi. Moreover, dissolved matters derived from MF played a non-neglected role in regulating organic carbon transformation in MPs-polluted sediment. Besides, MF addition decreased the complexity of bacterial community network in MPs-polluted sediment but fungal community network became complicated. And the complexity of microbial network was MF amount-dependent. Even though stochastic process was dominated in sediment with or without MF, MF inputs enhanced the relative contribution of determinism and reduced the migration of microbial communities. A strong response of sediment microbes to MF affected sedimentary organic matters transformation driven by microbes. This work uncovered linkages between organic carbon transformation and microbes in sediment with endogenous litterfall and exogenous MPs inputs in mangroves.

中文翻译：

破译内源性红树林凋落物如何影响外源性微塑料输入沉积物中微生物驱动的有机物转化

本研究研究了内源性红树林凋落物（MF）输入对外源微塑料（MPS）污染沉积物中有机质转化的影响，并探讨了它们与微生物特性的联系。MF 输入通过提高微生物的腐殖化、酶活性和碳利用能力，显著影响 MPs 污染沉积物中的有机碳转化。这种效应主要与 MF 输入诱导的负责有机物质分解的微生物的富集有关。事实上，MF 添加增加了发酵和纤维素结合细菌以及腐生真菌的相对丰度。此外，MF 衍生的溶解物质在调节 MPs 污染沉积物中的有机碳转化中发挥了不可忽视的作用。此外，MF 添加降低了 MPs 污染沉积物中细菌群落网络的复杂性，但真菌群落网络变得复杂。微生物网络的复杂性与 MF 量有关。尽管随机过程在有或没有 MF 的沉积物中占主导地位，但 MF 输入增强了确定性的相对贡献并减少了微生物群落的迁移。沉积物微生物对 MF 的强烈反应影响了微生物驱动的沉积有机物转化。这项工作揭示了有机碳转化与沉积物中微生物与红树林中内源性凋落物和外源 MPs 输入之间的联系。

更新日期：2024-09-05

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