Meta-omics analysis reveals the marine arsenic cycle driven by bacteria.

Arsenic is a toxic element widely distributed in the Earth's crust and ranked as a class I human carcinogen. Microbial metabolism makes significant contributions to arsenic detoxification, migration and transformation. Nowadays, research on arsenic is primarily in areas affected by arsenic poll...

Full description

Bibliographic Details
Published in:Journal of Hazardous Materials
Main Authors: Teng, Zhao-Jie, Li, Jian, Wang, Peng, Li, Chun-Yang, Peng, Ming, Qin, Qi-Long, Chen, Xiu-Lan, Chen, Yin, Fu, Hui-Hui, Wang, Ning, Zhang, Yu-Zhong
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier Science 2024
Subjects:
Arsenate reduction
Arsenic methylation
Biovolatilization of arsenic
Microbial metabolism
Toxic arsenide
Antarc*
Antarctic
Human health
Online Access:https://doi.org/10.1016/j.jhazmat.2024.135137
https://pubmed.ncbi.nlm.nih.gov/39024770
Description
Summary:Arsenic is a toxic element widely distributed in the Earth's crust and ranked as a class I human carcinogen. Microbial metabolism makes significant contributions to arsenic detoxification, migration and transformation. Nowadays, research on arsenic is primarily in areas affected by arsenic pollution associated with human health activities. However, the biogeochemical traits of arsenic in the global marine ecosystem remain to be explicated. In this study, we revealed that seawater environments were primarily governed by the process of arsenate reduction to arsenite, while arsenite methylation was predominant in marine sediments which may serve as significant sources of arsenic emission into the atmosphere. Significant disparities existed in the distribution patterns of the arsenic cycle between surface and deep seawaters at middle and low latitudes, whereas these situations tend to be similar in the Arctic and Antarctic oceans. Significant variations were also observed in the taxonomic diversity and core microbial community of arsenic cycling across different marine environments. Specifically, γ-proteobacteria played a pivotal role in the arsenic cycle in the whole marine environment. Temperature, dissolved oxygen and phosphate were the crucial factors that related to these differentiations in seawater environments. Overall, our study contributes to a deeper understanding of the marine arsenic cycle.

Similar Items