Effect of dissolved oxygen on methane production from bottom sediment in a eutrophic stratified lake

Maruya, Yasuyuki; Nakayama, Keisuke; Sasaki, Masafumi; Komai, Katsuaki

doi:10.1016/j.jes.2022.01.025

Cited by 12 publications

(5 citation statements)

References 38 publications

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“…Although we did not find a significant linear relationship between the CH 4 emission and water depth, there was a significantly negative correlation between the CH 4 emission fluxes and DO concentrations, but the R 2 value was much lower (Figure 7). One study reported that lower DO concentrations in water overlying the sediment in the lakes led to a higher CH 4 production [47], and thus increased the release of the CH 4 in a eutrophic lake [17,48]. In our study, the average DO concentration (4.5 mg/L) in the NNs was significantly lower than that of the KKs (7.9 mg/L, Figure 3g,h).…”

Section: Discussioncontrasting

confidence: 40%

Effects of Lotus (Nelumbo nucifera Gaertn.) on the Methane Emission in Littoral Zones of a Subtropical Lake, China

Zhou,

Yuan,

et al. 2023

Applied Sciences

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Freshwater lakes represent a potential source of methane (CH4) emission into the atmosphere. However, the CH4 emission contribution to the total emission in the littoral zones of lakes, especially emergent macrophytes (e.g., lotus), is poorly known. Lotus has been cultivated in almost all provinces in China; it is not only an aquatic plant, but also a kind of vegetable. In this study, two sampling zones (lotus plant and open water) were established in the lake of the middle reaches of the Yangtze River. The CH4 emission was measured using a floating opaque chamber and gas chromatography between April and December in the years 2021 and 2022. The results indicated that the flux of CH4 emissions ranged from 0.10 to 59.75 mg m−2 h−1, with an average value of 5.61 mg m−2 h−1, in the open water, while ranging from 0.19 to 57.32 mg m−2 h−1, with an average value of 17.14 mg m−2 h−1, in the lotus plant zone. The maximal CH4 emissions occurred in July and August for the open water, which was highly related to the air and water temperature, whereas it happened in September for the lotus plant zone, possibly due to the high vegetation biomass, indirectly enhancing the high soil organic carbon content, plant-mediated CH4 emission, as well as the lower dissolved oxygen concentration, thus strengthening the production and emissions of CH4. Considering the carbon emissions (both CH4 and CO2) and plant productivity, although greater CH4 emission occurred in the lotus plant zone, it could still represent a potential carbon sink (213 g m−2 yr−1) compared to the open water.

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Section: Discussioncontrasting

confidence: 40%

Effects of Lotus (Nelumbo nucifera Gaertn.) on the Methane Emission in Littoral Zones of a Subtropical Lake, China

Zhou,

Yuan,

et al. 2023

Applied Sciences

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“…CH 4 is produced in sediment under anoxic conditions by methanogens and is released into the atmosphere through three pathways, including ebullition, diffusion and plantmediated emissions [3,44,45]. Two studies showed that lower DO concentrations in water overlaying the sediment in the lake and marsh resulted in higher CH 4 production [46,47] and greater CH 4 emissions [10,48]. In the present study, the mean DO concentration at the four sites of the lake, from highest to lowest, was as follows: OPs > TNs > ECs > ZLs (Figure 3e).…”

Section: Discussionmentioning

confidence: 99%

Invasive Water Hyacinth (Eichhornia crassipes) Increases Methane Emissions from a Subtropical Lake in the Yangtze River in China

et al. 2022

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Lakes represent an important source of atmospheric methane (CH4); however, there are few studies on which lake-dwelling invasive aquatic plants generate CH4. Therefore, in this study, CH4 emissions were measured using a floating chamber and gas chromatography in a subtropical lake in China. We considered four community zones of invasive plants (Eichhornia crassipes), emergent vegetation (Zizania latifolia), floating-plant (Trapa natans) and open-water zones. The results indicate that the flux of CH4 emissions varied between −5.38 and 102.68 mg m−2 h−1. The higher emission values were attributed to lake eutrophication. Moreover, the flux of CH4 emissions in the invasive plant zone was 140%–220% higher than that in the open-water and the floating-plant zones. However, there was no significant difference in CH4 emissions between the invasive plant and the emergent vegetation zones. This may be due to a higher production of plants, as well as the rapid reproductive rate of the invasive plants. Finally, CH4 emissions were positively associated with the air and water temperature; however, the emissions were also negatively associated with water depth. Our results suggest that invasive plants enhance freshwater CH4 emissions, thus contributing to global warming.

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“…The number of gas-lled cavities was negatively correlated with the content of dissolved oxygen (Maruya., et al, 2022). This phenomenon was more obvious at 40-60 mm.…”

Section: Bulk Densitymentioning

confidence: 99%

Experimental study on pollution release and sediment scouring of sewage sediment in a drainage pipe considering incubation time

Zhang

Zhu

et al. 2023

Environ Sci Pollut Res

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The pollution release and the anti-scourability characteristics of the pipe sewage sediments can directly determine the blockage status of pipeline and treatment burden at the terminal (sewage treatment plant). In this study, the sewer environment under different buried depths was designed to explore the impact of incubation time on the physicochemical characteristics, pollution release effect and anti-scouring ability of the silted sediment in the drainage pipe. The results show that, incubation time, sediment matrix, temperature and dissolved oxygen can affect microbial activity, but temperature has a greater in uence.These factors affect microbial activity and loosen the superstructure in the sediment. In addition, by measuring the indexes of nitrogen and phosphorus in the overlying water, it was found that the sediment incubated for a certain time can release pollutants to the overlying water, and the release amount was obviously affected by high temperature (e.g., 35 ℃). After a certain time (e.g., 30 days), bio lms appear on the sediment surface, and the anti-scourability of sediment was signi cantly improved, which was re ected in the increase of the median particle size of sediment left in the pipe.

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Effect of dissolved oxygen on methane production from bottom sediment in a eutrophic stratified lake

Cited by 12 publications

References 38 publications

Effects of Lotus (Nelumbo nucifera Gaertn.) on the Methane Emission in Littoral Zones of a Subtropical Lake, China

Effects of Lotus (Nelumbo nucifera Gaertn.) on the Methane Emission in Littoral Zones of a Subtropical Lake, China

Invasive Water Hyacinth (Eichhornia crassipes) Increases Methane Emissions from a Subtropical Lake in the Yangtze River in China

Experimental study on pollution release and sediment scouring of sewage sediment in a drainage pipe considering incubation time

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