Spatiotemporal variability and diffusive emissions of greenhouse gas in a shallow eutrophic lake in Inner Mongolia, China

Li, Guohua; Zhang, Sheng; Shi, Xun; Zhan, Liyang; Zhao, Shengnan; Sun, Biao; Liu, Yu; Tian, Zhiqiang; Li, Zhijun; Арвола, Лаури; Uusheimo, Sari; Tulonen, Tiina; Huotari, Jussi

doi:10.1016/j.ecolind.2022.109578

Cited by 8 publications

(3 citation statements)

References 53 publications

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“…On the one hand, it could intensify ecosystem respiration and lead to increased CO2 emissions by introducing more labile organics 15 . On the other hand, eutrophication can stimulate phytoplankton growth, which in turn consumes more CO2 through photosynthesis 34 . These contrasting mechanisms highlight the intricate dynamics within eutrophic systems and the potential for both increased CO2 productions and consumptions.…”

Section: Characterizing the Ghg Emission Rates From China's Lakesmentioning

confidence: 99%

Improved estimation of lake greenhouse gas emissions in China based on nutrients and potential benefits from eutrophication controls

Tong,

Wang,

Zhao

et al. 2024

Preprint

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Lakes are important natural sources of greenhouse gases (GHGs) to the atmosphere, and their nutrient status is a significant driver affecting GHGs production and emission. Nevertheless, when estimating GHGs emissions at regional or national scales, the variations in emission rates caused by differences in nutrient status are often overlooked or not adequately considered. The potential social benefits of eutrophication control in mitigating climate change damage were rarely quantified, leading to largely underestimated benefits generated from water quality improvement. In this study, we compiled a comprehensive dataset on the emission rates of three typical GHGs (i.e., CO2, CH4, and N2O) from China’s lakes (n=356), and their nutrient concentrations, lake morphologies, and climate information. The fitted models between lake GHG emission rates and their drivers were established to upscale national GHGs emissions from lakes and approximate the changes in GHGs emissions under different nitrogen and phosphorus levels. We found that the current GHGs emissions from China’s lakes were 48.44 (31.60‒73.79) Tg CO2-eq·y-1, with CO2 emissions contributing around 52%. Even with a mere 10% reduction in nitrogen concentration in lakes nationwide over 2020‒2050, the estimated decrease in the GHGs emissions over the 30-year period would be 46.9 Tg CO2-eq, avoided climate change damages values could reach $1.5‒4.9 billion (2020 $US). Lake eutrophication controls can present an excellent chance to simultaneously achieve the Sustainable Development Goals of “clean water and sanitation” and “climate action”, accelerating the global progress toward sustainability.

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Section: Characterizing the Ghg Emission Rates From China's Lakesmentioning

confidence: 99%

Improved estimation of lake greenhouse gas emissions in China based on nutrients and potential benefits from eutrophication controls

Tong,

Wang,

Zhao

et al. 2024

Preprint

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“…Located in a cold, arid region, the region has a mean annual temperature of 7.5°C and precipitation of 225 mm. The region experiences ve months of ice cover per year, with most precipitation occurring between June and September (Li et al, 2022). Wuliangsuhai Lake is a river track lake formed by the diversion of the Yellow River, which mainly covers the receding lakes of the farmland in the river-loop irrigation area, with serious eutrophication of the water body, accelerated marsh process, and serious water environmental issues.…”

Section: Study Areamentioning

confidence: 99%

Influence of environmental factors on changes in the speciation of Pb and Cr in sediments of Wuliangsuhai Lake, during the ice-covered period

Zhao,

Shi

et al. 2024

Environ Geochem Health

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Ecological pollution caused by heavy metals released by sediments is a worldwide concern. However, the effect of changes in sediment speciation on their release of heavy metals has not been adequately reported. This study analysed changes in the sediment speciation of Pb and Cr before and after a release experiment by varying the temperature, pH, and salinity of the water column. The results show that the release of Pb and Cr from sediments increases with increasing water temperature, mainly due to the conversion of the residual fraction of Pb to the Fe-Mn oxide fraction and Cr converting more residual fraction to the organic matter and sul de fraction. The release of sediment Pb and Cr decreased with increasing pH, with Pb converting more acid extractable fraction to the residual fraction and Cr converting more organic matter and sul de fraction to the residual fraction. In contrast, the release of Pb and Cr increased and then decreased with increasing salinity, with the acid extractable and residual fractions of Pb interconverting, and the organic matter and sul de fraction and the residual fraction of Cr showing higher interconversion. For Pb, the acid extractable fraction was more susceptible to conversion to the residual fraction by environmental in uences, whereas for Cr, the organic matter and sul de fraction was susceptible to conversion to the residual fraction. This study highlights the in uence of environmental factors on the sediment speciation of heavy metals, which can help reveal the transport and transformation of heavy metals in cold and arid lake sediments.

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“…As the largest freshwater lake in the Yellow River Basin and the eighth largest freshwater lake in China, its entire area is 325.31 km 2 , of which 123.11 km 2 is open water and the remaining area is inhabited by littoral Phragmites sp. [35]. It has a north-south length of 35-40 km and an east-west width of 5-10 km.…”

Section: Case Study Lakementioning

confidence: 99%

Differences of Nitrogen Transformation Pathways and Their Functional Microorganisms in Water and Sediment of a Seasonally Frozen Lake, China

Tian

Sheng

et al. 2023

Water

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Nitrogen is one of the most important elements involved in ecosystem biogeochemical cycling. However, little is known about the characteristics of nitrogen cycling during the ice-covered period in seasonally frozen lakes. In this study, shotgun metagenomic sequencing of subglacial water and sediment from Lake Ulansuhai was performed to identify and compare nitrogen metabolism pathways and microbes involved in these pathways. In total, ammonia assimilation was the most prominent nitrogen transformation pathway, and Bacteria and Proteobacteria (at the domain and phylum levels, respectively) were the most abundant portion of microorganisms involved in nitrogen metabolism. Gene sequences devoted to nitrogen fixation, nitrification, denitrification, dissimilatory nitrate reduction to ammonium, and ammonia assimilation were significantly higher in sediment than in surface and subsurface water. In addition, 15 biomarkers of nitrogen-converting microorganisms, such as Ciliophora and Synergistetes, showed significant variation between sampling levels. The findings of the present study improve our understanding of the nitrogen cycle in seasonally frozen lakes.

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Spatiotemporal variability and diffusive emissions of greenhouse gas in a shallow eutrophic lake in Inner Mongolia, China

Cited by 8 publications

References 53 publications

Improved estimation of lake greenhouse gas emissions in China based on nutrients and potential benefits from eutrophication controls

Improved estimation of lake greenhouse gas emissions in China based on nutrients and potential benefits from eutrophication controls

Influence of environmental factors on changes in the speciation of Pb and Cr in sediments of Wuliangsuhai Lake, during the ice-covered period

Differences of Nitrogen Transformation Pathways and Their Functional Microorganisms in Water and Sediment of a Seasonally Frozen Lake, China

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