Greenhouse gas fluxes response to autumn freeze–thaw period in continuous permafrost region of Daxing’an Mountains, Northeast China

Gao, Dawen; Wang, Weijie; Gao, Weifeng; Zeng, Qingshuang; Liang, Hong

doi:10.1007/s11356-022-20371-2

Cited by 6 publications

(9 citation statements)

References 37 publications

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“…In this study, CO 2 flux increased significantly while CH 4 flux decreased significantly, and N 2 O flux did not have a distinct change after two DFTCs ( Table 1 ), indicating that DFTCs induced different effects on greenhouse gas fluxes ( Wang et al, 2013 ; Gao et al, 2022 ). Previous studies have shown that the response of greenhouse gas emissions to freeze–thaw cycles was related to their patterns ( e.g ., frequency, duration and freezing temperature) ( Wu et al, 2020 ; Liu et al, 2022 ).…”

Section: Discussionmentioning

confidence: 55%

“…Freeze-thaw cycles might lead to changes in water availability, as well as the redistribution of mineral elements and nutrients through fluctuation in Ts and repeated phase shifts of water, thus affecting soil microbial growth and metabolism (Zhang et al, 2016;Meisner et al, 2021;Liu et al, 2022). In this study, CO 2 flux increased significantly while CH 4 flux decreased significantly, and N 2 O flux did not have a distinct change after two DFTCs (Table 1), indicating that DFTCs induced different effects on greenhouse gas fluxes (Wang et al, 2013;Gao et al, 2022). Previous studies have shown that the response of greenhouse gas emissions to freeze-thaw cycles was related to their patterns (e.g., frequency, duration and freezing temperature) (Wu et al, 2020;Liu et al, 2022).…”

Section: Discussionmentioning

confidence: 61%

“…Freeze–thaw cycles could alter soil hydrothermal conditions and physicochemical properties, and thus influence soil microbial activity, community structure, and diversity ( Gao et al, 2022 ; Ji et al, 2022 ). As an engine of biogeochemical cycles ( Falkowski et al, 2008 ; Sokol et al, 2022 ), soil microorganisms play a critical role in greenhouse gas emissions, which may have potentially positive climate feedback in the permafrost regions ( Bardgett et al, 2008 ; Jansson and Hofmockel, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

“…Many studies have reported the direct and indirect effects of freeze–thaw cycles on the soil environment, including physicochemical properties, microorganisms, and greenhouse gases (GHGs) ( Wang et al, 2013 ; Ren et al, 2018 ; Schostag et al, 2019 ; Gao et al, 2022 ). Zhao et al (2000) found that soil hydrothermal transportation was more dynamic in the active layer of the alpine steppe in the permafrost regions of the central QTP during seasonal freeze–thaw cycles.…”

Section: Introductionmentioning

confidence: 99%

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Effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions

Chen

et al. 2022

Front. Microbiol.

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Understanding the impacts of diurnal freeze–thaw cycles (DFTCs) on soil microorganisms and greenhouse gas emissions is crucial for assessing soil carbon and nitrogen cycles in the alpine ecosystems. However, relevant studies in the permafrost regions in the Qinghai-Tibet Plateau (QTP) are still lacking. In this study, we used high-throughput pyrosequencing and static chamber-gas chromatogram to study the changes in topsoil bacteria and fluxes of greenhouse gases, including carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), during autumn DFTCs in the permafrost regions of the Shule River headwaters on the western part of Qilian Mountains, northeast margin of the QTP. The results showed that the bacterial communities contained a total of 35 phyla, 88 classes, 128 orders, 153 families, 176 genera, and 113 species. The dominant phyla were Proteobacteria, Acidobacteria, Actinobacteria, Chloroflexi, and Gemmatimonadetes. Two DFTCs led to a trend of increasing bacterial diversity and significant changes in the relative abundance of 17 known bacteria at the family, genus, and species levels. These were predominantly influenced by soil temperature, water content, and salinity. In addition, CO2 flux significantly increased while CH4 flux distinctly decreased, and N2O flux tended to increase after two DFTCs, with soil bacteria being the primary affecting variable. This study can provide a scientific insight into the impact of climate change on biogeochemical cycles of the QTP.

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Section: Discussionmentioning

confidence: 55%

Section: Discussionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions

Chen

et al. 2022

Front. Microbiol.

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“…The outflow of young generations towards urban areas and the declining population and average age in rural areas have changed community demographics, especially in developed countries [4][5][6]. Additionally, as consumer society progresses, the environment and community lifestyle change as a result of environmental destruction [7][8][9]. If such changes continue, population declines and environmental changes may disrupt lives in rural communities [2,10].…”

Section: Introductionmentioning

confidence: 99%

Students’ Learning on Sustainable Development Goals through Interactive Lectures and Fieldwork in Rural Communities: Grounded Theory Approach

Ohta¹,

Yata

Sano

2022

Sustainability

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Sustainable social-resource-based community management and sustainable development goals (SDGs) are crucial for community sustainability and sustainable development, respectively, and SDG education is vital to motivate people to continue SDG-appropriate activities. This study aims to evaluate the effectiveness of the SDG education of Rural Japanese University students using the grounded theory approach and investigate how their ideas about future work subsequently change. This study analyzes the learning and attitude changes in students enrolled in an elective SDG course and establishes the learning theory behind SDG education in rural universities. In this approach, student SDG education consists of three themes and eleven concepts. Through SDG education based on interactive lectures and rural fieldwork, participants reconsider community and society concepts in an SDG-minded framework. Based on this new perspective, participants begin considering community sustainability by gaining new insight from a first-person standpoint. Participants acquire SDG-minded working competencies, such as collaborative advancement, respect for inclusive societies, community revitalization from different perspectives, and mindset reconstruction. SDG educational processes were conducted in rural communities through university student SDG education, which deepened their understanding of community sustainability. Thus, SDG education should employ real practitioners to university curricula and deal with cultural and traditional diversity via effective collaboration.

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Water level of inland saline wetlands with implications for CO2 and CH4 fluxes during the autumn freeze–thaw period in Northeast China

Wang

Liang

et al. 2023

Environ Sci Pollut Res

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Greenhouse gas fluxes response to autumn freeze–thaw period in continuous permafrost region of Daxing’an Mountains, Northeast China

Cited by 6 publications

References 37 publications

Effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions

Effects of autumn diurnal freeze–thaw cycles on soil bacteria and greenhouse gases in the permafrost regions

Students’ Learning on Sustainable Development Goals through Interactive Lectures and Fieldwork in Rural Communities: Grounded Theory Approach

Water level of inland saline wetlands with implications for CO2 and CH4 fluxes during the autumn freeze–thaw period in Northeast China

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