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Effect of weir impoundments on methane dynamics in a river

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F17%3A00479598" target="_blank" >RIV/60077344:_____/17:00479598 - isvavai.cz</a>

  • Alternative codes found

    RIV/60076658:12310/17:43895535 RIV/61989592:15310/17:73579472

  • Result on the web

    <a href="http://dx.doi.org/10.1016/j.scitotenv.2017.01.163" target="_blank" >http://dx.doi.org/10.1016/j.scitotenv.2017.01.163</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.scitotenv.2017.01.163" target="_blank" >10.1016/j.scitotenv.2017.01.163</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Effect of weir impoundments on methane dynamics in a river

  • Original language description

    We measured CH4 concentration, CH4 oxidation in the water column and total CH4 emissions to the atmosphere (diffusion and ebullition) in three weir impoundments and river reaches between them, in order to understand their role in river methane (CH4) dynamics. Sediment samples were also collected to determine CH4 consumption and production potentials together with the contribution of individual methanogenic pathways. The CH4 surface water concentration increased 7.5 times in the 16 km long river stretch. Microbial CH4 oxidation in the water column reached values ranging from 51 to 403 nmol l(-1) d(-1) and substantially contributed to the CH4 removal from surface water, together with CH4 emissions. The total CH4 emissions to the atmosphere varied between 0.8 and 207.1 mmol CH4 m(-2) d(-1) with the highest values observed upstream of the weirs (mean 68.5 +/- 29.9 mmol CH4 m(-2) d(-1)). Most of the CH4 was transported through the air-water interface by ebullition upstream of the Weirs, while the ebullition accounted for 95.8 +/- 2.0% of the total CH4 emissions. Both CH4 production and oxidation potential of sediments were higher upstream of the weirs compared to downstream of the weirs. The contribution of hydrogenotrophic methanogenesis to total CH4 sediment production was 36.7-89.4% and prevailed upstream of the weirs. Our findings indicate that weirs might influence river CH4 dynamics, especially by increased CH4 production and consumption by sediments, followed by increasing CH4 emissions to the atmosphere.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10617 - Marine biology, freshwater biology, limnology

Result continuities

  • Project

    <a href="/en/project/GA13-00243S" target="_blank" >GA13-00243S: Unveiling life strategies of selected groups of planktonic Betaproteobacteria in relationship to carbon flow to higher trophic levels</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2017

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Science of the Total Environment

  • ISSN

    0048-9697

  • e-ISSN

  • Volume of the periodical

    584

  • Issue of the periodical within the volume

    April

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    11

  • Pages from-to

    164-174

  • UT code for WoS article

    000399358500018

  • EID of the result in the Scopus database

    2-s2.0-85011034428