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Research
Jing Liu
Inner Mongolia Agricultural University
Corresponding Author
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This work is licensed under a CC BY 4.0 License. Read Full License
Background
We investigated the spatio-temporal dynamics of soil carbon dioxide (CO2) and soil methane (CH4)-flux during biological soil crust (BSC) 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 CO2 and CH4-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 CO2-flux was apparent. The average CO2- 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 CH4-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 CO2-flux but could not influence CH4 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 deserts, artificial planting could promote sand fixation and BSC 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 CO2 flux and vegetation restoration, and BSC 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.
Keywords
Hobq Desert, carbon emission, soil carbon density, biological soil crusts, hydrothermal factors
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CURRENT STATUS: Under Review
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Posted 25 Feb, 2021
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Received 13 Jul, 2021
Reviewer #2 agreed
On 23 Jun, 2021
Review #1 received
Received 21 Jun, 2021
Reviewer #1 agreed
On 10 Jun, 2021
Reviews received
Received 10 Jun, 2021
Editor assigned
On 21 Feb, 2021
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Editor invited
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A new preprint design is coming!
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This preprint is under consideration at Carbon Balance and Management. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research
Jing Liu
Inner Mongolia Agricultural University
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 25 Feb, 2021
No community comments so far
Editorial decision: Major Revision
On 19 Jul, 2021
Review #2 received
Received 13 Jul, 2021
Reviewer #2 agreed
On 23 Jun, 2021
Review #1 received
Received 21 Jun, 2021
Reviewer #1 agreed
On 10 Jun, 2021
Reviews received
Received 10 Jun, 2021
Editor assigned
On 21 Feb, 2021
Reviewers invited
Invitations sent on 21 Feb, 2021
Editor invited
On 21 Feb, 2021
Submission checks complete
On 20 Feb, 2021
First submitted
On 17 Feb, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background
We investigated the spatio-temporal dynamics of soil carbon dioxide (CO2) and soil methane (CH4)-flux during biological soil crust (BSC) 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 CO2 and CH4-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 CO2-flux was apparent. The average CO2- 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 CH4-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 CO2-flux but could not influence CH4 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 deserts, artificial planting could promote sand fixation and BSC 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 CO2 flux and vegetation restoration, and BSC 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.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
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