Flux and influencing factors of CO2 outgassing in a karst spring-fed creek: Implications for carbonate weathering-related carbon sink assessment

Wang, Zhijun; Yin, Jian‐Jun; Pu, Junbing; Xiao, Qiong; Zhang, Tao; Li, Jianhong

doi:10.1016/j.jhydrol.2020.125710

Cited by 14 publications

(5 citation statements)

References 52 publications

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“…Karst area is a strategic zone for research related to climate change and carbon flux because the unique terrestrial cave is subject to changes in response to external environmental conditions ( 1 , 2 ). The karst cave is characterized by darkness and dampness with “buffering effects,” where microorganisms play critical roles in regulating the regional biogeochemical cycles ( 3 , 4 ).…”

Section: Introductionmentioning

confidence: 99%

Microbial Interactions Drive Distinct Taxonomic and Potential Metabolic Responses to Habitats in Karst Cave Ecosystem

Huang

Wang

et al. 2021

Microbiol Spectr

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Section: Introductionmentioning

confidence: 99%

Microbial Interactions Drive Distinct Taxonomic and Potential Metabolic Responses to Habitats in Karst Cave Ecosystem

Huang

Wang

et al. 2021

Microbiol Spectr

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“…In general, pCO 2 in groundwater is often maintained at very high levels, up to tens or even more than a hundred times the atmospheric CO 2 content, due to the influence of high soil CO 2 leaching, and thus is often in a state of supersaturation [58,59]. Therefore, when groundwater emerges from the ground as a spring and forms a river, most of the DIC escapes rapidly to the atmosphere due to the large CO 2 concentration gradient.…”

Section: Discussionmentioning

confidence: 99%

The Mechanisms Controlling the CO2 Outgassing of a Karst Spring–River–Lake Continuum: Evidence from Baotuquan Spring Drainage Area, Jinan City, Northern China

Wen

Zhang

Liu

et al. 2023

Water

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The significance of CO2 emissions at the water–air interface from inland water bodies in the global carbon cycle has been recognized and is being studied more and more. Although it is important to accurately assess CO2 emission flux in a catchment, little research has been carried out to investigate the spatio-temporal variations in CO2 emissions in view of a water continuum. Here, we systematically compared the differences and control factors of CO2 degassing across the water–air interface of a spring–river–lake continuum in the discharge area of Baotuquan Spring in July 2017, which is a typical temperate karst spring area in Jinan city, northern China, using hydrogeochemical parameters, stable carbon isotope values, and CO2 degassing flux. Affected by the pCO2 concentration gradient between the water and ambient air, the spring water showed a high CO2 degassing flux (166.19 ± 91.91 mmol/(m2 d)). After the spring outlet, the CO2 degassing flux in the spring-fed river showed a slight increase (181.05 ± 155.61 mmol/(m2 d)) due to river flow rate disturbance. The river flow rate was significantly reduced by the “blockage” of the lake, which promoted the survival and reproduction of phytoplankton and provided favorable conditions for aquatic plant photosynthesis, increasing the plankton biomass in the lake to 3383.79 × 104/L. In addition, the significant decrease in the dissolved inorganic carbon (DIC) concentration and the increase in the δ13CDIC values in the lake also indicated that the photosynthesis of the lake’s aquatic plants resulted in a significant decrease in the pCO2 concentration, thus limiting the amount of CO2 off-gassing (90.56 ± 55.03 mmol/(m2 d)).

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“…Karst areas are climate change-sensitive areas and are CO 2 sinks that cannot be ignored ( 15 , 16 ). In view of the vital regulatory role of microorganisms in regional biogeochemical cycles, the characteristics of microbial communities in karst regions have been studied ( 17 – 19 ).…”

Section: Introductionmentioning

confidence: 99%

Unique Habitat of Karst Tiankengs Changes the Taxonomy and Potential Metabolism of Soil Microbial Communities

Jiang

Zeng

2023

Microbiol Spectr

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Flux and influencing factors of CO2 outgassing in a karst spring-fed creek: Implications for carbonate weathering-related carbon sink assessment

Cited by 14 publications

References 52 publications

Microbial Interactions Drive Distinct Taxonomic and Potential Metabolic Responses to Habitats in Karst Cave Ecosystem

Microbial Interactions Drive Distinct Taxonomic and Potential Metabolic Responses to Habitats in Karst Cave Ecosystem

The Mechanisms Controlling the CO2 Outgassing of a Karst Spring–River–Lake Continuum: Evidence from Baotuquan Spring Drainage Area, Jinan City, Northern China

Unique Habitat of Karst Tiankengs Changes the Taxonomy and Potential Metabolism of Soil Microbial Communities

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