物种均匀度
中层带
微生物种群生物学
物种丰富度
半深海区
微塑料
生态学
微生物
环境科学
生态系统
蛋白质细菌
生物
生物多样性
海洋生态系统
远洋带
底栖区
细菌
遗传学
16S核糖体RNA
作者
Zhiqiang Wu,Jianxing Sun,Lei Xu,Hongbo Zhou,Haina Cheng,Chen Zhu,Yuguang Wang,Jian Yang
标识
DOI:10.1016/j.jhazmat.2023.132921
摘要
Microplastics have become one of the hot concerns of global marine pollution. In recent years, diversity and abiotic influence factors of plastisphere microbial communities were well documented, but our knowledge of their assembly mechanisms and co-occurrence patterns remains unclear, especially the effects of depth on them. Here, we collected microorganisms on microplastics to investigate how ocean depth affects on microbial diversity, community composition, assembly processes and co-occurrence patterns. Our results indicated that there were similar microbial richness and community compositions but microbial evenness and unique microbes were obviously different in different ocean layers. Our findings also demonstrated that deterministic processes played dominant roles in the assembly of the mesopelagic plastisphere microbial communities, while the bathypelagic microbial community assembly was mainly shaped by stochastic processes. In addition, the co-occurrence networks suggested that the relationships between microorganisms in the mesopelagic layer were more complex and stable than those in the bathypelagic layer. Simultaneously, we also found that Proteobacteria and Actinobacteriota were the most abundant keystones which played important roles in microbial co-occurrence networks at both layers. This study enhanced our understanding of microbial diversity, assembly mechanism, and co-occurrence pattern on plastisphere surfaces, and provided useful insights into microorganisms capable of degrading plastics and microbial remediation. Microplastic pollution significantly threatens marine ecosystems, impacting safety and biodiversity. The pervasive presence of microplastics, from surface to the ocean's depths, underscores the urgency of intervention. While studies have identified surface-attached microbes capable of plastic degradation, the effects of depth on microbial diversity and distribution patterns remain unclear. This study compares the influences of ocean depths on microbial diversity, co-occurrence patterns, and assembly processes. Our findings provide fresh insights into comprehending marine plastic pollution and its biodegradation.
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