Treated and untreated wastewater effluents alter river sediment bacterial communities involved in nitrogen and sulphur cycling

The Science of the Total Environment
Miren Martínez-SantosEstilita Ruiz-Romera

Abstract

Studying the dynamics of nitrogen and sulphur cycling bacteria in river surface sediments is essential to better understand their contribution to global biogeochemical cycles. Evaporitic rocks settled at the headwater of the Deba River catchment (northern Spain) lead to high values of sulphate concentration in its waters. Besides, the discharge of effluents from untreated and treated residual (urban and industrial) wastewaters increases the concentration of metals, nutrients and organic compounds in its mid- and low-water courses. The aim of this study was to assess the impact of anthropogenic contamination from untreated and treated residual and industrial wastewaters on the structure and function of bacterial communities present in surface sediments of the Deba River catchment. The application of a quantitative functional approach (qPCR) based on denitrification genes (nir: nirS+nirK; and nosZ), together with a 16S rRNA gene metabarcoding structural analysis, revealed (i) the high relevance of the sulphur cycle at headwater surface sediments (as reflected by the abundance of members of the Syntrophobacterales order, and the Sulfuricurvum and Thiobacillus genera) and (ii) the predominance of sulphide-driven autotrophic denitri...Continue Reading

Citations

May 9, 2019·Environmental Geochemistry and Health·Kien Thanh NguyenJohn L Zhou
Jul 17, 2020·Environmental Science and Pollution Research International·Jitka MaláZuzana Bílková
Dec 14, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Donglei WuAqiang Ding
Jun 20, 2020·Ecotoxicology·Marilina FernandezPaola S González
Jan 24, 2021·Water Environment Research : a Research Publication of the Water Environment Federation·Lei ZhangJing Li
Sep 16, 2019·Environmental Pollution·Luz Breton-DevalRosario Vera-Estrella
Jul 17, 2021·Journal of Environmental Management·Cristiane Arruda OliveiraMárcia Helena Rissato Zamariolli Damianovic

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