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Evaluating the Impacts of Various Co...

Sharma, Manju,

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Evaluating the Impacts of Various Contaminants on Sediment Microbiomes and Methane Emission in the Kanawha River Ecosystem /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Evaluating the Impacts of Various Contaminants on Sediment Microbiomes and Methane Emission in the Kanawha River Ecosystem // Manju Sharma.
作者:	Sharma, Manju,
面頁冊數:	1 electronic resource (108 pages)
附註:	Source: Masters Abstracts International, Volume: 87-05.
Contained By:	Masters Abstracts International87-05.
標題:	Environmental science. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=32280603
ISBN:	9798297964570

Evaluating the Impacts of Various Contaminants on Sediment Microbiomes and Methane Emission in the Kanawha River Ecosystem /
Sharma, Manju,

Evaluating the Impacts of Various Contaminants on Sediment Microbiomes and Methane Emission in the Kanawha River Ecosystem /Manju Sharma. - 1 electronic resource (108 pages)

Source: Masters Abstracts International, Volume: 87-05.

Rivers act as biogeochemical reactors in the global carbon cycle, where sediments serve as hotspots of microbial activity and methane production. However, industrialization and urbanization have increasingly altered sediment chemistry and microbial processes, influencing key ecosystem functions. Understanding how contaminants interact with sediment properties to shape microbial diversity and methane generation is essential for predicting biogeochemical responses in riverine environments. This study investigates how sediment properties and contaminants exposure shape microbial diversity and methane production in the Kanawha River watershed, West Virginia. Sediments were collected from the riverbed of Kanawha River and Cabin Creek. Chemical analyses indicated that SO₄²⁻ was a site-specific chemical signature for Cabin Creek which is highly affected by coal mining. Microcosm experiments assessed methane emissions and microbial community responses to contaminants such as NaCl, crude oil, refined oil, polycyclic aromatic hydrocarbons (pyrene, acenaphthene and fluoranthene), pyrethroid and asphalt. A Biochemical Methane Potential (BMP) test using cellulose as an amendment was found to distinguish methane potential in different sediments. Contaminant amendments demonstrated that salinity and PAHs inhibited methane production, whereas cellulose and pyrethroid stimulated it, and combined treatments produced non-additive effects. Microbial diversity analyses revealed that substrate availability and contaminant toxicity drive community restructuring, with pollutant-degrading taxa and methanogens responding dynamically to environmental stressors. These findings highlight the importance of microbial diversity and type of chemical contaminants and their interactions in the decomposition of organic matter and regulating methane emissions within riverine ecosystems.

English

ISBN: 9798297964570Subjects--Topical Terms:

677245
Environmental science.
Subjects--Index Terms:

Methane emissions

Evaluating the Impacts of Various Contaminants on Sediment Microbiomes and Methane Emission in the Kanawha River Ecosystem /
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