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IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research Pub Date : 2025-03-11 DOI:10.1016/j.marenvres.2025.107077

Wenxue Che , Hui Zhao , Ying Man , Xiao Tan

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引用次数: 0

摘要

了解海洋地理环境与微生物功能之间错综复杂的关系对于海洋保护和管理至关重要。在本研究中，我们利用 16S rRNA 高通量测序技术对北部湾近岸和离岸沉积物中的细菌组成和功能进行了全面分析。结果表明，蛋白细菌（平均相对丰度：27.07%）和脱硫细菌（平均相对丰度：12.28%）是所有站点的优势菌门，而禾本科（3.26%-8.31%）和厌氧菌科（0.61%-7.43%）可作为潜在的污染指示物种。在我们的研究区域，沉积物样本中细菌群落的 α-多样性显示出从沿海到近海区域的最初增加，随后随着距离海岸线的增加而减少。沉积物细菌群落的组成主要受总磷 (R2 = 0.183, p < 0.01) 和盐度 (R2 = 0.550, p < 0.01) 的影响。此外，KEGG通路的硫（S）循环基因随距离海岸的远近有显著变化，这意味着近岸沉积物中硫氧化占主导地位，而硫还原主要发生在离岸沉积物中，这归因于不同海洋环境中氧化还原条件的差异。这些发现不仅加深了我们对海洋地理环境与微生物功能之间错综复杂关系的理解，而且有助于阐明北部湾的生物地球化学特征。这项研究将为各种海洋区域的保护和管理提供宝贵的信息和坚实的科学依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Spatial characteristics of microbial communities and their functions in sediments of subtropical Beibu Gulf, China

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Spatial characteristics of microbial communities and their functions in sediments of subtropical Beibu Gulf, China

Understanding the intricate relationship between marine geography and microbial functions is crucial for marine conservation and management. In this study, we conducted a comprehensive analysis of bacterial composition and function in nearshore and offshore sediments of the Beibu Gulf using 16S rRNA high-throughput sequencing. The results showed that Proteobacteria (average relative abundance: 27.07 %) and Desulfobacterota (average relative abundance: 12.28 %) were the most dominant phyla across all stations, while Woeseiaceae (3.26 %–8.31 %) and Anaerolineaceae (0.61 %–7.43 %) could serve as potential indicator species for pollution. In our study area, the α-diversity of bacterial communities in sediment samples showed an initial increase from coastal to offshore regions, followed by a decrease with further distance from the coastlines. The composition of sediment bacterial communities was mainly influenced by total phosphorus (R² = 0.183, p < 0.01) and salinity (R² = 0.550, p < 0.01). Furthermore, the sulfur (S) cycling genes of KEGG pathways displayed significant variations with the distance from shore, implying that S oxidation dominated in nearshore sediments, while S reduction occurred mainly in offshore sediments, which was attributed to the differences in redox conditions across diverse marine environments. These findings will not only enhance our current understanding of the intricate relationship between marine geography and microbial functions but also contribute to elucidating the biogeochemical characteristics of the Beibu Gulf. This research will provide valuable information and a solid scientific basis for the conservation and management of various marine areas.

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来源期刊

Marine environmental research 环境科学-毒理学

CiteScore

5.90

自引率

3.00%

发文量

217

审稿时长

46 days

期刊介绍： Marine Environmental Research publishes original research papers on chemical, physical, and biological interactions in the oceans and coastal waters. The journal serves as a forum for new information on biology, chemistry, and toxicology and syntheses that advance understanding of marine environmental processes. Submission of multidisciplinary studies is encouraged. Studies that utilize experimental approaches to clarify the roles of anthropogenic and natural causes of changes in marine ecosystems are especially welcome, as are those studies that represent new developments of a theoretical or conceptual aspect of marine science. All papers published in this journal are reviewed by qualified peers prior to acceptance and publication. Examples of topics considered to be appropriate for the journal include, but are not limited to, the following: – The extent, persistence, and consequences of change and the recovery from such change in natural marine systems – The biochemical, physiological, and ecological consequences of contaminants to marine organisms and ecosystems – The biogeochemistry of naturally occurring and anthropogenic substances – Models that describe and predict the above processes – Monitoring studies, to the extent that their results provide new information on functional processes – Methodological papers describing improved quantitative techniques for the marine sciences.