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
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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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
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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