南极欺骗岛海洋微生物群落分类和功能指标与火山和人为压力因素的关系

IF 5.4 Q1 ENVIRONMENTAL SCIENCES
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引用次数: 0

摘要

近年来,随着应用于极地微生物群落的 OMIC 技术的发展,南极旅游业的增长刺激了对该地区人为影响的研究。本研究旨在通过确定人为和自然/火山压力的潜在分类学、功能和抗性指标,评估人类对欺骗岛海洋原核生物和病毒群落的影响。蛋白细菌、类杆菌和放线菌是主要的门类,火山活动和人为压力造成了明显的差异。在火山活动增加的地区,极毛虫类的大量存在突出表明了它们对极端条件的适应能力。它们对汞的抗性以及应对有毒重金属的能力是管理火山汞浓度的关键因素。放线菌、蓝细菌、放线菌和协同菌显示出独特的丰度模式,对火山环境具有潜在的生态影响。功能分析显示,与金属、碳氢化合物降解和氮代谢相关的功能得到了丰富。海底火山喷口极大地促进了功能多样性的形成。与医院内感染和肠胃炎有关的特定功能的鉴定突出了人类活动对功能特征的影响。抗生素耐药性基因(ARGs)显示了受人为压力和火山活动影响的微妙模式。放线菌与 ARG 丰度的增加相关,而废水处理又增强了 ARG 的丰度。值得注意的是,尽管人为影响较小,但富马罗湾某些 ARGs 的流行率却有所上升,这表明火山活动诱发了独特的选择性压力。这些指标对不同程度压力的反应能力使它们成为评估和减轻人类活动对欺骗岛海洋水域影响的宝贵工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Marine microbial community taxonomic and functional indicators to volcanic and anthropogenic stressors in Deception Island, Antarctica
In recent years, the growth in Antarctic tourism has stimulated research on the anthropogenic impacts on the region, boosted by advances in OMIC technologies applied to polar microbial communities. This study aimed to assess the human impacts on marine prokaryotic and viral communities of Deception Island by identifying potential taxonomic, functional, and resistome indicators of both anthropogenic and natural/volcanic pressures. Proteobacteria, Bacteroidetes, and Actinobacteria were the dominant phyla, with notable variations attributed to volcanic activity and anthropogenic pressure. The abundance of Euryarchaeota in regions with increased volcanic activity underlines their adaptability to extreme conditions. Their mercury resistance coupled with their ability to cope with toxic heavy metals is a critical component in managing volcanic mercury concentrations. Actinobacteria, Cyanobacteria, Planctomycetes, and Synergistetes showed distinctive abundance patterns with potential ecological implications related to volcanic environments. Functional analyses revealed the enrichment of functions associated with metal-based, hydrocarbon degradation, and nitrogen metabolism. Submarine volcanic vents contributed significantly to the shape of functional diversity. Identification of specific functions related to nosocomial infections and gastroenteritis highlights the impact of anthropogenic activities on functional traits. Antibiotic resistance genes (ARGs) showed nuanced patterns influenced by both anthropogenic pressure and volcanic activity. Actinobacteria were correlated with increased ARG abundance, which was enhanced by wastewater disposal. Remarkably, Fumarole Bay showed an increased prevalence of certain ARGs, despite a lower anthropogenic impact, suggesting a unique selective pressure induced by volcanic activity. The responsiveness of these indicators to varying levels of pressure characterizes them as valuable tools for assessing and mitigating anthropogenic impacts on the marine waters of Deception Island.
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来源期刊
Environmental and Sustainability Indicators
Environmental and Sustainability Indicators Environmental Science-Environmental Science (miscellaneous)
CiteScore
7.80
自引率
2.30%
发文量
49
审稿时长
57 days
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