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- W3135176306 abstract "Abstract Background We investigated the spatio-temporal dynamics of soil carbon dioxide (CO 2 )- and soil methane (CH 4 )-flux during biological soil crust (BSCs) deposition in a sand-binding area in the eastern Chinese Hobq Desert. The trends in soil organic carbon (C) content and density were analyzed during this process. The sampling sites comprised a mobile dune (control) and those with algal, lichen, and moss crust-fixed sands. The desert soil CO 2 - and CH 4 -flux, temperature, and water content were measured from May to October in 2017 and 2018. Simultaneously, organic C content and density were measured and analyzed by stratification. Results The spatio-temporal variation in desert soil CO 2 -flux was apparent. The average CO 2 - fluxes in the control, algal, lichen, and moss sites were 1.67, 2.61, 5.83, and 6.84 mmol m −2 h −1 , respectively, during the growing season, and the average CH 4 -fluxes in the four sites were − 1.13, − 1.67, − 3.66, and − 3.77 µmol m −2 h −1 , respectively. Soil temperature was significantly positively correlated with CO 2 -flux but could not influence CH 4 absorption, and C flux had minimal correlation with soil water content. The soil total organic C density at all sites was significantly different and decreased as follows: moss > lichen > algal > control; moreover, it decreased with soil depth at all sites. The accumulation of desert soil organic C could enhance soil C emissions. Conclusion In a semi-arid desert, artificial planting could promote sand fixation and BSCs succession; therefore, increasing the C storage capacity of desert soils and decreasing soil C emissions could alter the C cycle pattern in desert ecosystems. Soil temperature is the major factor controlling desert soil CO 2 flux and vegetation restoration, and BSCs development could alter the response patterns of C emissions to moisture conditions in desert soils. The results provide a scientific basis for studying the C cycle in desert ecosystems." @default.
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- W3135176306 date "2021-09-13" @default.
- W3135176306 modified "2023-10-17" @default.
- W3135176306 title "Changes in soil carbon sequestration and emission in different succession stages of biological soil crusts in a sand-binding area" @default.
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- W3135176306 doi "https://doi.org/10.1186/s13021-021-00190-7" @default.
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