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Tytuł:
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Carcass decay deteriorates water quality and modifies the nirS denitrifying communities in different degradation stages.
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Autorzy:
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Yu Q; School of Public Health, Lanzhou University, Lanzhou 730000, China.
Zhou R; School of Public Health, Lanzhou University, Lanzhou 730000, China.
Wang Y; School of Public Health, Lanzhou University, Lanzhou 730000, China.
Su W; School of Public Health, Lanzhou University, Lanzhou 730000, China.
Yang J; School of Public Health, Lanzhou University, Lanzhou 730000, China.
Feng T; School of Public Health, Lanzhou University, Lanzhou 730000, China.
Dou Y; Hubei Aquaculture Technology Extension Center (Hubei Aquatic Breeds Introduction and Breeding Center), Wuhan 430070, China.
Li H; School of Public Health, Lanzhou University, Lanzhou 730000, China; Center for Grassland Microbiome, Lanzhou University, Lanzhou 730000, China.. Electronic address: .
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Źródło:
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The Science of the total environment [Sci Total Environ] 2021 Sep 01; Vol. 785, pp. 147185. Date of Electronic Publication: 2021 Apr 22.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: Amsterdam, Elsevier.
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MeSH Terms:
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Denitrification*
Water Quality*
Animals ; Bacteria ; Cadaver ; Nitrogen
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Contributed Indexing:
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Keywords: Aquatic environment; Cadaver degradation; Denitrification; Deterministic processes; Nitrogen contamination; nirS
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Substance Nomenclature:
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N762921K75 (Nitrogen)
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Entry Date(s):
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Date Created: 20210502 Date Completed: 20210610 Latest Revision: 20210610
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Update Code:
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20240105
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DOI:
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10.1016/j.scitotenv.2021.147185
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PMID:
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33933763
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Corpse degradation may release amounts of hazardous materials (e.g., cadaverine, putrescine and ammonia) into surrounding areas, which deteriorate environments and result in nitrogen contamination. Nitrate or nitrite can be reduced to nitrogen gas by denitrifying bacteria, thus alleviating nitrogen contamination and purifying aquatic environments. However, the reaction of nirS-encoding denitrifiers to carcass degradation is less studied. Therefore, water physiochemical analysis and high-throughput sequencing were applied to explore the successional pattern of nirS denitrifying communities in the Yellow River water and tap water during three stages of animal cadaver decay (submerged fresh, advanced floating decay as well as sunken remains) and relevant control group. Nitrate nitrogen (NO 3 -N) and ammonia nitrogen (NH 4 + -N) concentration in corpse groups were highly elevated compared with control groups. The dominant phylum for nirS denitrifying communities was Proteobacteria. Abundant denitrifying genera Paracoccus, Alicycliphilus and Diaphorobacter were detected, and these genera have been reported to participate in the degradation of organic pollutants. Particularly, nirS-type community structures were remarkably influenced by corpse decay and became similar with succession. Water total dissolved solids (TDS), salinity, conductivity (CON) and phosphate were primary impacting factors driving the community structures, but the effect of water type was almost negligible. Notably, denitrifying community assembly was dominated by deterministic processes rather than stochastic processes, and the relative importance of deterministic processes among most corpse groups was higher than that in control groups, indicating that environmental filtering regulates the denitrifying communities. Our results provide new insight into environmental purification for hazardous materials produced by corpse degradation, thereby providing valuable advice to environmental administration.
Competing Interests: Declaration of competing interest The authors declare no conflict of interest.
(Copyright © 2021 Elsevier B.V. All rights reserved.)