Nonlinear response of methane release to increased trophic state levels coupled with microbial processes in shallow lakes

Zhou, Yanmin; Song, Kang; Han, Ruiming; Riya, Shohei; Xu, Xiaoguang; Yeerken, Senbati; Geng, Shixiong; Ma, You; Terada, Akihiko

doi:10.1016/j.envpol.2020.114919

Cited by 35 publications

(15 citation statements)

References 55 publications

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“…The extent of emissions depends on the efficiency of the methanotrophic biofilter and environmental conditions, such as mixing patterns, ebullition, and trophic state of the lakes (Kankaala et al, 2007;Bellido et al, 2009;Yang et al, 2019). Increased temperature and eutrophication are expected to surge the CH 4 production in lakes (Sepulveda-Jauregui et al, 2018;Zhou et al, 2020). However, those could also improve the efficiency of the methanotrophic biofilter (Davidson et al, 2015;Denfeld et al, 2018;de Jong et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Apart from CH 4 and O 2 , it is necessary to include other physicochemical parameters that potentially influence CH 4 oxidation. Indeed, factors such as light (Rissanen et al, 2018;Thottathil et al, 2018), phosphorus (Denfeld et al, 2018;Zhou et al, 2020), community richness (Ho et al, 2014), temperature (Yang et al, 2019), and different forms of nitrogen (Bodelier and Laanbroek, 2004) have been shown to influence CH 4 oxidation rates. However, the impact of those environmental parameters on the methanotrophic communities is still unclear and often seems contradictory (Ho et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Candidatus Methylumidiphilus Drives Peaks in Methanotrophic Relative Abundance in Stratified Lakes and Ponds Across Northern Landscapes

et al. 2021

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Boreal lakes and ponds produce two-thirds of the total natural methane emissions above the latitude of 50° North. These lake emissions are regulated by methanotrophs which can oxidize up to 99% of the methane produced in the sediments and the water column. Despite their importance, the diversity and distribution of the methanotrophs in lakes are still poorly understood. Here, we used shotgun metagenomic data to explore the diversity and distribution of methanotrophs in 40 oxygen-stratified water bodies in boreal and subarctic areas in Europe and North America. In our data, gammaproteobacterial methanotrophs (order Methylococcales) generally dominated the methanotrophic communities throughout the water columns. A recently discovered lineage of Methylococcales, Candidatus Methylumidiphilus, was present in all the studied water bodies and dominated the methanotrophic community in lakes with a high relative abundance of methanotrophs. Alphaproteobacterial methanotrophs were the second most abundant group of methanotrophs. In the top layer of the lakes, characterized by low CH4 concentration, their abundance could surpass that of the gammaproteobacterial methanotrophs. These results support the theory that the alphaproteobacterial methanotrophs have a high affinity for CH4 and can be considered stress-tolerant strategists. In contrast, the gammaproteobacterial methanotrophs are competitive strategists. In addition, relative abundances of anaerobic methanotrophs, Candidatus Methanoperedenaceae and Candidatus Methylomirabilis, were strongly correlated, suggesting possible co-metabolism. Our data also suggest that these anaerobic methanotrophs could be active even in the oxic layers. In non-metric multidimensional scaling, alpha- and gammaproteobacterial methanotrophs formed separate clusters based on their abundances in the samples, except for the gammaproteobacterial Candidatus Methylumidiphilus, which was separated from these two clusters. This may reflect similarities in the niche and environmental requirements of the different genera within alpha- and gammaproteobacterial methanotrophs. Our study confirms the importance of O2 and CH4 in shaping the methanotrophic communities and suggests that one variable cannot explain the diversity and distribution of the methanotrophs across lakes. Instead, we suggest that the diversity and distribution of freshwater methanotrophs are regulated by lake-specific factors.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Candidatus Methylumidiphilus Drives Peaks in Methanotrophic Relative Abundance in Stratified Lakes and Ponds Across Northern Landscapes

et al. 2021

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“…Based on our measurements, the TP at the lake was 0.088 mg L −1 in August and 0.239 mg L −1 in November 2021, which could have altered the CH4 emissions of the lake [3]. Many studies have found that eutrophic lakes release more CH4 emissions into the atmosphere [14,37,38]. Zhou et al [37] reported that emission values ranged from 0.1 to 351.9 mg h −2 h −1 for shallow lakes in the Yangtze River Basin and were related to more enriched waters.…”

Section: Discussionmentioning

confidence: 80%

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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“…For the quantity of sedimentary OM, although warming can stimulate carbon fixation and OM decomposition simultaneously, our data suggest that a larger amount of OM would be preserved in sediments of Tibetan lakes as water depth and transparency increase. As for the quality of sedimentary OM, autochthonous OM is more active than allochthonous OM in enhancing methane emission (Praetzel et al 2020; Zhou et al 2020). Our results show that a deeper and more transparent lake will lead to a larger loading of autochthonous carbon to the sediments, which predicts higher methane emissions from Tibetan lakes.…”

Section: Discussionmentioning

confidence: 99%

Water depth and transparency drive the quantity and quality of organic matter in sediments of Alpine Lakes on the Tibetan Plateau

Luo

Chen

et al. 2022

Limnology & Oceanography

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Identifying primary environmental drivers mediating the quantity and quality of sedimentary organic matter (OM) in climate-sensitive alpine lakes is crucial to understanding the role of alpine lakes in greenhouse gas emissions and Earth's climate system. Here, we characterized various pools of OM of 20 alpine lakes across the Tibetan Plateau, including bulk OM, water-soluble OM and alkaline-extracted OM from surface sediments, and dissolved OM (DOM) from surface water. The total organic carbon (TOC) content in sediments was low (< 3%), and δ 13 C of TOC and C : N ratios indicated limited allochthonous carbon inputs. Sedimentary water-soluble OM and alkaline-extracted OM were both dominated by low-molecular-weight, low-aromaticity compounds with low contributions of terrestrial humic substances, suggesting that sedimentary leachable OM was primarily regulated by in-lake sources and processes. Redundancy analysis showed that water depth, water transparency, and total phosphorus concentration in water column explained $ 50% variance of sedimentary bulk and leachable OM, substantiating the importance of autochthonous sources and primary productivity in regulating the quantity and quality of sedimentary OM. Compared with lake surface water DOM, water-soluble OM and alkaline-extracted OM from sediments had higher proportions of terrestrial humic-like substances, suggesting preferential preservation of allochthonous materials in sediments. Our results are the first to demonstrate a clear link between physical attributes and sedimentary OM in Tibetan lakes. The associated relations predict that the amount of total OM and autochthonous carbon preserved in sediments would increase due to the lake enlargement under the scenarios of climate warming and precipitation enhancement, which may amplify greenhouse gas emissions from Tibetan lakes.

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Nonlinear response of methane release to increased trophic state levels coupled with microbial processes in shallow lakes

Cited by 35 publications

References 55 publications

Candidatus Methylumidiphilus Drives Peaks in Methanotrophic Relative Abundance in Stratified Lakes and Ponds Across Northern Landscapes

Candidatus Methylumidiphilus Drives Peaks in Methanotrophic Relative Abundance in Stratified Lakes and Ponds Across Northern Landscapes

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

Water depth and transparency drive the quantity and quality of organic matter in sediments of Alpine Lakes on the Tibetan Plateau

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