Alpine wetland degradation reduces carbon sequestration in the Zoige Plateau, China

Yang, Ankun; Kang, Xiaoming; Li, Yong; Zhang, Xiaodong; Zhang, Kerou; Kang, Enze; Yan, Zhongqing; Li, Meng; Wang, Xiaodong; Niu, Yuechuan; Yan, Lijun

doi:10.3389/fevo.2022.980441

Cited by 11 publications

(5 citation statements)

References 65 publications

(51 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A study of CO 2 fluxes for the entire year of 2005 in the Haibei wetland of the Qinghai-Tibet Plateau showed that it released around 86.18 g C•m −2 •yr −1 into the atmosphere, making it a carbon source as well [18]. The interannual variations in NEE in wetland ecosystems are closely linked to climate [19][20][21], hydrology [22], and vegetation conditions [23]. These factors collectively play a significant role in shaping the carbon sink functions of specific ecosystems.…”

Section: Discussionmentioning

confidence: 99%

Carbon Dioxide Fluxes and Influencing Factors in the Momoge Salt Marsh Ecosystem, Jilin Province, China

Ma,

Zhang,

Chen

et al. 2023

Preprint

View full text Add to dashboard Cite

This study observes the characteristics and influencing factors of carbon fluxes of the Momoge salt marsh ecosystem over four years, which behaves as a CO2 sink. The daily, seasonal, and interannual variations of CO2 fluxes in the Momoge salt marshes were observed using the eddy covariance method and compared with various environmental factors. An overall daily “U” shaped distribution was observed, with uptake during the day (negative values) and release at night (positive values). Annually, the carbon fluxes in the study area roughly exhibit a “V” shape. Carbon fluxes during the non-growing season predominantly showed positive values, indicating the release of CO2 into the atmosphere. Photosynthetically active radiation was the primary influencing factor affecting hourly and daytime variations in net ecosystem exchange (NEE) during the growing season, while temperature was the main factor influencing nighttime NEE dynamics. Air temperature, soil temperature, photosynthetically active radiation, precipitation, and water level all had significant impacts on daily net CO2 exchange. At the monthly scale, larger values of soil temperature, air temperature, photosynthetically active radiation, and aboveground biomass correspond to a stronger carbon absorption capacity of the ecosystem. Overall, temperature remains the primary factor for carbon fluxes in the Momoge wetlands.

show abstract

Section: Discussionmentioning

confidence: 99%

Carbon Dioxide Fluxes and Influencing Factors in the Momoge Salt Marsh Ecosystem, Jilin Province, China

Ma,

Zhang,

Chen

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

Carbon Dioxide Fluxes and Influencing Factors in the Momoge Salt Marsh Ecosystem, Jilin Province, China

Ma,

Zhang,

Chen

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

This study observed the characteristics and influencing factors of the carbon fluxes of the Momoge salt marsh ecosystem over four years, which behaves as a CO2 sink. The daily, seasonal, and interannual variations in CO2 fluxes in the Momoge salt marshes were observed using the eddy covariance method and were compared with various environmental factors. An overall daily “U”-shaped distribution was observed, with uptake during the day (negative values) and release at night (positive values). Annually, the carbon fluxes in the study area roughly exhibited a “V” shape. The carbon fluxes during the non-growing season predominantly showed positive values, indicating the release of CO2 into the atmosphere. Photosynthetically active radiation was the primary influencing factor affecting the hourly and daytime variations in net ecosystem exchange (NEE) during the growing season, while temperature was the main factor influencing nighttime NEE dynamics. The air temperature, soil temperature, photosynthetically active radiation, precipitation, and water level all had significant impacts on the daily net CO2 exchange. At the monthly scale, larger values of soil temperature, air temperature, photosynthetically active radiation, and aboveground biomass corresponded to a stronger carbon absorption capacity of the ecosystem. Overall, temperature remains the primary factor for carbon fluxes in the Momoge wetlands.

show abstract

“…Soil pH affects the absorption of soil nutrients by plants. During the growth of plants, physiological and biological characteristics also affect soil pH [42]. The reduction in soil pH caused by planting Medicago sativa is attributed to the strong nitrogenfixing ability of Rhizobium in the alfalfa rhizosphere, which leads to the secretion of H + ions and various organic acids by nitrogen-fixing bacteria and roots, thereby lowering the soil pH [43], consequently affecting soil microorganisms and plants, and indirectly affecting ecosystem C cycling [44].…”

Section: Effects Of Environmental Factors On Carbon Fluxesmentioning

confidence: 99%

Cultivated Grassland Types Differently Affected Carbon Flux Downstream of the Yellow River

Wang,

Qu,

et al. 2024

Agronomy

View full text Add to dashboard Cite

Cultivated grasslands are an important part of grassland ecosystems and have been proven to be major carbon sinks, then playing an important role in the global carbon balance. The effect of cultivated grassland type (Medicago sativa, Triticum aestivum, Secale cereale, and Vicia villosa grasslands) on carbon flux (including net ecosystem CO2 exchange (NEE), ecosystem respiration (ER), and gross ecosystem productivity (GEP)) downstream of the Yellow River was studied via the static chamber technique and a portable photosynthetic system. Bare land was used as a control. The results showed that the four cultivated grassland types were mainly carbon sinks, and bare land was a carbon source. The cultivated grassland types significantly affected carbon flux. The average NEE and GEP of the grassland types were in the following order from high to low: Medicago sativa, Secale cereale, Triticum aestivum, and Vicia villosa grassland. Stepwise regression analysis showed that among all measured environmental factors, soil pH, soil bulk density (BD), soil organic carbon (SOC), and soil microbial carbon (MBC) were the main factors affecting CO2 flux. The combined influence of soil BD, SOC, and pH accounted for 77.6% of the variations in NEE, while soil BD, SOC, and MBC collectively explained 79.8% of changes in ER and 72.9% of the changes in GEP. This finding indicates that Medicago sativa grassland is a cultivated grassland with a high carbon sink level. The changes in carbon flux were dominated by the effects of soil physicochemical properties.

show abstract

Alpine wetland degradation reduces carbon sequestration in the Zoige Plateau, China

Cited by 11 publications

References 65 publications

Carbon Dioxide Fluxes and Influencing Factors in the Momoge Salt Marsh Ecosystem, Jilin Province, China

Carbon Dioxide Fluxes and Influencing Factors in the Momoge Salt Marsh Ecosystem, Jilin Province, China

Carbon Dioxide Fluxes and Influencing Factors in the Momoge Salt Marsh Ecosystem, Jilin Province, China

Cultivated Grassland Types Differently Affected Carbon Flux Downstream of the Yellow River

Contact Info

Product

Resources

About