Methane dynamics in a large river: a case study of the Elbe River

Matoušů, Anna; Rulı́k, Martin; Tušer, Michal; Bednařík, Adam; Šimek, Karel; Bussmann, Ingeborg

doi:10.1007/s00027-018-0609-9

Cited by 24 publications

(21 citation statements)

References 64 publications

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“…A significant negative correlation between pCH 4 with DO concentrations (r = −0.63) clearly showed the effect of population pressure and pollution on the riverine ecosystem. Our results are in good agreement with the study of Matousu et al (2019), which also showed higher pCH 4 concentrations in human-altered riverine habitats and in more stagnant river segments [44]. The correlation between DO and pCH 4 concentrations is not as pronounced on the Tamil Nadu plain due to the low variability in values and the high outliers of CH 4 concentrations at Stations 13, 22, and 23.…”

Section: Links Between Greenhouse Gases and Water Quality And Their Connection To Urbanizationsupporting

confidence: 91%

Anthropogenic Impact on Tropical Perennial River in South India: Snapshot of Carbon Dynamics and Bacterial Community Composition

Premke

Gunasekaran

Steger

et al. 2020

Water

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Riverine systems play an important role in the global carbon cycle, and they are considered hotspots for bacterial activities such as organic matter decomposition. However, our knowledge about these processes in tropical or subtropical regions is limited. The aim of this study was to investigate anthropogenically induced changes of water quality, the distribution of selected pharmaceuticals, and the effects of pollution on greenhouse gas concentrations and bacterial community composition along the 800 km long Cauvery river, the main river serving as a potable and irrigation water supply in Southern India. We found that in situ measured pCO2 and pCH4 concentrations were supersaturated relative to the atmosphere and ranged from 7.9 to 168.7 μmol L−1, and from 0.01 to 2.76 μmol L−1, respectively. Pharmaceuticals like triclosan, carbamazepine, ibuprofen, naproxen, propylparaben, and diclofenac exceeded warning limits along the Cauvery. Proteobacteria was the major phylum in all samples, ranging between 26.1% and 82.2% relative abundance, and it coincided with the accumulation of nutrients in the flowing water. Results emphasized the impact of industrialization and increased population density on changes in water quality, riverine carbon fluxes, and bacterial community structure.

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Section: Links Between Greenhouse Gases and Water Quality And Their Connection To Urbanizationsupporting

confidence: 91%

Anthropogenic Impact on Tropical Perennial River in South India: Snapshot of Carbon Dynamics and Bacterial Community Composition

Premke

Gunasekaran

Steger

et al. 2020

Water

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“…Therefore, riverine CH 4 in very wet and very dry conditions was likely to be greater than in the normal weather and thus higher CH 4 flux from the river to the atmosphere would have occurred. ally under 40% of the CH 4 pool and was usually between 0 and 20%, which may partly be due to methanotrophy in the water column (de Angelis & Scranton, 1993;Matoušů et al, 2018;Sawakuchi et al, 2016). Microbial methane oxidization can consume CH 4 and enrich 13 C in the remaining CH 4 pool, resulting in a decrease in [CH 4 ] and concurrent increase of δ 13 C-CH 4 .…”

Section: Riverine Ch 4 Magnitude Sources and Dynamicsmentioning

confidence: 99%

Carbon dioxide, methane, and dissolved carbon dynamics in an urbanized river system

Waldron

Bass

2021

Hydrological Processes

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Estimates of greenhouse gas evasion from rivers have been refined over the past decades to constrain their role in global carbon cycle processes. However, despite 55% of the human population living in urban areas, urban rivers have had limited attention. We monitored carbon dynamics in an urbanized river (River Kelvin, 331 km 2 , UK) to explore the drivers of dissolved carbon lateral and vertical export.Over a 2-year sampling period, riverine methane (CH 4 ) and carbon dioxide (CO 2 ) concentrations were consistently oversaturated with respect to atmospheric equilibria, leading to continual degassing to the atmosphere. Carbon stable isotopic compositions (δ 13 C) indicated that terrestrially derived carbon comprised most of the riverine CH 4 and dissolved CO 2 (CO 2 *) load while dissolved inorganic carbon (DIC) from groundwater was the main form of riverine DIC. The dynamics of CH 4 , CO 2 *, and DIC in the river were primarily hydrology-controlled, that is, [CH 4 ] and [CO 2 *] both increased with elevated discharge, total [DIC] decreased with elevated discharge while the proportion of biologically derived DIC increased with increasing discharge.The concentration of dissolved organic carbon (DOC) showed a weak relationship with river hydrology in summer and autumn and was likely influenced by the combined sewer overflows. Carbon emission to the atmosphere is estimated to be 3.10 ± 0.61 kg CÁm À2 Áyr À1 normalized to water surface area, with more than 99% emitted as CO 2 . Annual carbon loss to the coastal estuary is approximately 4.69 ± 0.70 Gg C yr À1 , with annual DIC export approximately double that of DOC. Per unit area, the River Kelvin was a smaller carbon source to the atmosphere than natural rivers/ streams but shows elevated fluxes of DIC and DOC under comparable conditions. This research illustrates the role urban systems may have on riverine carbon dynamics and demonstrates the potential tight link between urbanization and riverine carbon export.

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“…δ 13 C-CH4 in all water samples showed obvious temporal and spatial variations, and maximum values were found before and under the two dams. Lower In freshwaters, a large fraction of CH4 in the aquatic food network exists as a carbon source which was oxidized by bacteria, can reduce CH4 entering the water by diffusion (Jones and Grey, 2011;Taipale et al, 2011;Frossard et al, 2015;Sawakuchi et al, 2016;Matoušů et al, 2019;Thottathil et al, 2019;Saarela et al, 2020), which may change CH4 dynamics in water. Previous studies reported that the methane oxidizing bacteria (MOB) can survive at oxic-anoxic interfaces in freshwater systems, and CH4 oxidation was frequently found in environments with high CH4 and DO concentrations (Bagnoud et al, 2020;Reis et al, 2020;Bai et al, 2021 (Whiticar and Faber, 1986;Conrad, 1999;Bastviken et al, 2002;Lima, 2005).…”

Section: Spatial and Temporal Variations In Ch4 And Co2 Concentrations δ 13 C-ch4mentioning

confidence: 99%

Methane accumulation affected by particulate organic carbon in upper Yangtze deep valley dammed cascade reservoirs, China

Zhang

et al. 2021

Preprint

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Abstract. Methane (CH4) emissions from freshwaters to the atmosphere have a profound impact on global atmospheric greenhouse gas (GHG) concentrations. Anthropogenic footprints such as dam construction and reservoir operation significantly changed the fate and transport of CH4 in freshwaters. The type of particulate organic carbon (POC) in reservoirs is a critical factor controlling CH4 production and emissions. However, little is known of how reservoir operation mediates the distribution of POC and regulates CH4 accumulation in cascade hydroelectric reservoirs. Here, spatial and temporal variations in POC and CH4 were explored in the Xiluodu (XLD) and Xiangjiaba (XJB) reservoirs which are deep valley dammed cascade reservoirs located in the main channel of the upper Yangtze River. Based on the δ13C-POC and N / C mole ratios of particulate organic matter, the results of multi-endmember stable isotope mixing models by a Bayesian model show that terrestrial POC and autochthonous POC accounted for approximately 56 ± 19 % and 42 ± 19 % (SD, n = 181) of POC, respectively. CH4 concentrations and δ13C-CH4 in the cascade reservoirs were potentially influenced by CH4 oxidation. Together with other physicochemical parameters and structural equation model, these results suggested that the input of terrestrial POC was dominantly influenced by water level variations and flow regulation due to reservoir operation. The cumulative effect of POC caused by cascade reservoirs was not apparent at a bimonthly scale. Terrestrial POC was more likely to dominate CH4 accumulation in cascade reservoirs under reservoir operation.

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Methane dynamics in a large river: a case study of the Elbe River

Cited by 24 publications

References 64 publications

Anthropogenic Impact on Tropical Perennial River in South India: Snapshot of Carbon Dynamics and Bacterial Community Composition

Anthropogenic Impact on Tropical Perennial River in South India: Snapshot of Carbon Dynamics and Bacterial Community Composition

Carbon dioxide, methane, and dissolved carbon dynamics in an urbanized river system

Methane accumulation affected by particulate organic carbon in upper Yangtze deep valley dammed cascade reservoirs, China

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