Impact of differences in soil temperature on the desert carbon sink

Yang, Fan; Huang, Jianping; He, Qing; Zheng, Xiaodong; Zhou, Chenglong; Pan, Honglin; Huo, Wen; Huo, Yongxin; Liu, Xiaoyue; Meng, Lei; Han, Dawei; Mamtimin, Ali; Yang, Xinghua

doi:10.1016/j.geoderma.2020.114636

Cited by 27 publications

(19 citation statements)

References 38 publications

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“…Although the real-time temperature in the stratosphere was below 0 • C, cyanobacterial crusts were able to absorb heat from solar radiation, thus increasing the soil temperature. Studies have shown that soil microorganisms in the Qinghai-Tibetan Plateau, Taklimakan Desert, Mu Us Desert, and Tengger Desert still have aerobic respiration activity under −10 • C~0 • C in winter [42][43][44][45]. Although the stratospheric environment was different from that on the ground, our results show that crusts microorganisms exhibited activity at a certain period of time during stratospheric exposure.…”

Section: Damage Degree and Tolerance Mechanisms Of Cyanobacterial Crustsmentioning

confidence: 51%

Responses of Cyanobacterial Crusts and Microbial Communities to Extreme Environments of the Stratosphere

Yang

2022

Microorganisms

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How microbial communities respond to extreme conditions in the stratosphere remains unclear. To test this effect, cyanobacterial crusts collected from Tengger Desert were mounted to high balloons and briefly exposed (140 min) to high UV irradiation and low temperature in the stratosphere at an altitude of 32 km. Freezing and thawing treatments were simulated in the laboratory in terms of the temperature fluctuations during flight. Microbial community composition was characterized by sequencing at the level of DNA and RNA. After exposure to the stratosphere, the RNA relative abundances of Kallotenue and Longimicrobium increased by about 2-fold, while those of several dominant cyanobacteria genera changed slightly. The RNA relative abundances of various taxa declined after freezing, but increased after thawing, whereas cyanobacteria exhibited an opposite change trend. The DNA and RNA relative abundances of Nitrososphaeraceae were increased by 1.4~2.3-fold after exposure to the stratosphere or freezing. Exposure to stratospheric environmental conditions had little impact on the total antioxidant capacity, photosynthetic pigment content, and photosynthetic rate, but significantly increased the content of exopolysaccharides by 16%. The three treatments (stratospheric exposure, freezing, and thawing) increased significantly the activities of N-acetyl-β-D-glucosidase (26~30%) and β-glucosidase (14~126%). Our results indicated cyanobacterial crust communities can tolerate exposure to the stratosphere. In the defense process, extracellular organic carbon degradation and transformation play an important role. This study makes the first attempt to explore the response of microbial communities of cyanobacterial crusts to a Mars-like stratospheric extreme environment, which provides a new perspective for studying the space biology of earth communities.

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Section: Damage Degree and Tolerance Mechanisms Of Cyanobacterial Crustsmentioning

confidence: 51%

Responses of Cyanobacterial Crusts and Microbial Communities to Extreme Environments of the Stratosphere

Yang

2022

Microorganisms

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“…The model calculates the total regional carbon stock through four carbon pools based on land use data. The carbon pool data used in this study were monitored from relevant experimental studies 6 , 59 ; the sandy areas were listed separately because the recent studies have determined that the deserts in Xinjiang have some carbon sink capacity 60 . In this study, the data most suitable for the arid zone were selected, and the carbon density with multiple reference values were averaged to obtain the carbon density table for this study (Table 2 ).…”

Section: Methodsmentioning

confidence: 99%

Carbon sinks and carbon emissions balance of land use transition in Xinjiang, China: differences and compensation

Luo

Wang

et al. 2022

Sci Rep

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With the continuous enhancement of human activities, the contradiction between regional development and ecological protection is prominent in the ecologically fragile arid areas. It is of great significance for regional sustainable development to understand the ecological supply and demand problems caused by transformation of land using and formulate ecological compensation scheme scientifically. This study takes Xinjiang in China as the research area. It explores the land use transition characteristics and the changes in carbon supply and demand of Xinjiang using methods such as GIS spatial analysis and modified comparative ecological radiation forcing. Finally, the ecological compensation scheme is studied based on the theory of ecological radiation. The research shows that (I) in the study chronology, most of the areas produced only one change in land use. Land use is gradually developing towards the direction of ecological protection. After 2000, grassland recovered well, and 14,298 km2 of other ecological land was transformed into grassland. (II) The change in the carbon sink of the Xinjiang ecosystem first decreased and then increased, and the ecological deficit area started to appear after 2010. The growth of grassland and cropland areas is essential to enhance the carbon sink capacity of arid zones. (III) The amount of ecological compensation in Xinjiang is 31.47 * 108 yuan, and the proportion of the amount received by ecological compensation areas is related to the distance between the supply and demand areas, the amount of carbon sequestration, and the area of the region. This study provides a reference for achieving the healthy development of sustainable land use ecosystems in arid zones.

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“…All three types of NKEFAs can achieve co-benefits of CS and EQ, and similar to Liu et al (2020), the soil conservation type has the greatest improvement effect. In contrast, the windbreak sand-fixation type only positively contributes to CS, probably because deserts, as an important part of terrestrial ecosystems, can sequester large amounts of carbon dioxide and play a key role as carbon sinks (Yang et al, 2020). However, the windbreak sand-fixation type is generally located in fragile ecosystems with high desertification and severe grassland degradation, with limited environmental benefits and still has a long way to go.…”

Section: Localization and Precision In The Management Of Nkefasmentioning

confidence: 99%

Co-benefits of the National Key Ecological Function Areas in China for carbon sequestration and environmental quality

Chen

Hou

et al. 2023

Front. Ecol. Evol.

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IntroductionThe National Key Ecological Functional Areas (NKEFAs) are location-oriented ecological engineering of China, which rely on the main functional area planning. The co-benefits of ecological product supply and ecological environment improvement of NKEFAs has not been fully assessed in the literature.MethodsNKEFAs is considered a quasi-natural experiment, and the time-varying difference-in-differences (DID) model is used to assess the impact of NKEFAs on carbon sequestration (CS) and environmental quality (EQ) based on the panel data of 330 cities in China from 2001 to 2019. Then, we explore whether the co-benefits of ecological product supply and eco-environment protection can be achieved.Results and discussionNKEFAs can enhance CS and EQ and thus achieve co-benefits for both. NKEFAs can achieve the co-benefits of CS and EQ through territory spatial allocation and labor force aggregation, but industrial structure upgrading only positively mediates the impact of NKEFAs on CS. The co-benefits of CS and EQ are heterogeneous across functional area types, geospatial locations, and quantiles, while only CS at windbreak-sand fixation area, northwestern region, and low quantile regions is enhanced. This study makes a theoretical and methodological contribution to the existing literature on the policy effect assessment of ecological engineering. It also provides a comprehensive framework for evaluating the ecological effects of relevant policies in other countries by integrating the co-benefits of ecological products and eco-environment, analyzing regional heterogeneity, and exploring the underlying mechanisms.

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Impact of differences in soil temperature on the desert carbon sink

Cited by 27 publications

References 38 publications

Responses of Cyanobacterial Crusts and Microbial Communities to Extreme Environments of the Stratosphere

Responses of Cyanobacterial Crusts and Microbial Communities to Extreme Environments of the Stratosphere

Carbon sinks and carbon emissions balance of land use transition in Xinjiang, China: differences and compensation

Co-benefits of the National Key Ecological Function Areas in China for carbon sequestration and environmental quality

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