Exploring bacterial functionality in mangrove sediments and its capability to overcome anthropogenic activity

MARINE POLLUTION BULLETIN

卷:141

Article

Cotta, Simone Raposo¹  Cadete, Luana Lira¹  van Elsas, Jan Dirk²  Andreote, Fernando Dini¹  Franco Dias, Armando Cavalcante¹ 

[1] Univ Sao Paulo, Dept Soil Sci, ESALQ USP, Piracicaba, Brazil

[2] Univ Groningen, Microbial Ecol Grp, Inst Evolutionary Life Sci, AG, Groningen, Netherlands

关键词: Metagenomics;    Metatranscriptomics;    Environmental microbiology;    Sulfur cycling;    Environmental pollution;    Stressors;   

DOI  :  10.1016/j.marpolbul.2019.03.001

来源: Elsevier

【 摘 要 】

Mangrove forests are highly productive yet vulnerable ecosystems that act as important carbon sinks (blue carbon). The objective of this work was to analyze the impact of anthropogenic activities on microbiome structure and functioning. The metagenomic analysis revealed that the taxonomic compositions were grossly similar across all mangrove microbiomes. Remarkably, these microbiomes, along the gradient of anthropogenic impact, showed fluctuations in the relative abundances of bacterial taxa predicted to be involved in sulfur cycling processes. Functions involved in sulfur metabolism, such as APS pathways (associated with sulfate reduction and sulfur oxidation processes) were prevalent across the microbiomes, being sox and dsrAB genes highly expressed on anthropogenically-impacted areas. Apparently, the oil-impacted microbiomes were more affected in taxonomic than in functional terms, as high functional redundancies were noted across them. The microbial gene diversity found was typical for a functional system, even following the previous disturbance.

【 授权许可】

Free