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      Interplay of soil characteristics and arbuscular mycorrhizal fungi diversity in alpine wetland restoration and carbon stabilization

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          Abstract

          Alpine wetlands are critical ecosystems for global carbon (C) cycling and climate change mitigation. Ecological restoration projects for alpine grazing wetlands are urgently needed, especially due to their critical role as carbon (C) sinks. However, the fate of the C pool in alpine wetlands after restoration from grazing remains unclear. In this study, soil samples from both grazed and restored wetlands in Zoige (near Hongyuan County, Sichuan Province, China) were collected to analyze soil organic carbon (SOC) fractions, arbuscular mycorrhizal fungi (AMF), soil properties, and plant biomass. Moreover, the Tea Bag Index (TBI) was applied to assess the initial decomposition rate ( k) and stabilization factor ( S), providing a novel perspective on SOC dynamics. The results of this research revealed that the mineral-associated organic carbon (MAOC) was 1.40 times higher in restored sites compared to grazed sites, although no significant difference in particulate organic carbon (POC) was detected between the two site types. Furthermore, the increased MAOC after restoration exhibited a significant positive correlation with various parameters including S, C and N content, aboveground biomass, WSOC, AMF diversity, and NH 4 +. This indicates that restoration significantly increases plant primary production, litter turnover, soil characteristics, and AMF diversity, thereby enhancing the C stabilization capacity of alpine wetland soils.

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          Most cited references47

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          The impacts of climate change and human activities on biogeochemical cycles on the Qinghai-Tibetan Plateau.

          With a pace of about twice the observed rate of global warming, the temperature on the Qinghai-Tibetan Plateau (Earth's 'third pole') has increased by 0.2 °C per decade over the past 50 years, which results in significant permafrost thawing and glacier retreat. Our review suggested that warming enhanced net primary production and soil respiration, decreased methane (CH(4)) emissions from wetlands and increased CH(4) consumption of meadows, but might increase CH(4) emissions from lakes. Warming-induced permafrost thawing and glaciers melting would also result in substantial emission of old carbon dioxide (CO(2)) and CH(4). Nitrous oxide (N(2)O) emission was not stimulated by warming itself, but might be slightly enhanced by wetting. However, there are many uncertainties in such biogeochemical cycles under climate change. Human activities (e.g. grazing, land cover changes) further modified the biogeochemical cycles and amplified such uncertainties on the plateau. If the projected warming and wetting continues, the future biogeochemical cycles will be more complicated. So facing research in this field is an ongoing challenge of integrating field observations with process-based ecosystem models to predict the impacts of future climate change and human activities at various temporal and spatial scales. To reduce the uncertainties and to improve the precision of the predictions of the impacts of climate change and human activities on biogeochemical cycles, efforts should focus on conducting more field observation studies, integrating data within improved models, and developing new knowledge about coupling among carbon, nitrogen, and phosphorus biogeochemical cycles as well as about the role of microbes in these cycles. © 2013 John Wiley & Sons Ltd.
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            Tea Bag Index: a novel approach to collect uniform decomposition data across ecosystems

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              Wetlands and global climate change: the role of wetland restoration in a changing world

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                Author and article information

                Contributors
                URI : https://loop.frontiersin.org/people/2640260/overviewRole: Role: Role: Role: Role: Role: Role: Role: Role: Role:
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                URI : https://loop.frontiersin.org/people/1904951/overviewRole: Role: Role:
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                URI : https://loop.frontiersin.org/people/1240306/overviewRole: Role: Role: Role:
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                Journal
                Front Microbiol
                Front Microbiol
                Front. Microbiol.
                Frontiers in Microbiology
                Frontiers Media S.A.
                1664-302X
                10 April 2024
                2024
                : 15
                : 1376418
                Affiliations
                [1] 1Key Laboratory of Land Resources Evaluation and Monitoring in Southwest (Sichuan Normal University), Ministry of Education , Chengdu, China
                [2] 2The Faculty of Geography Resource Sciences, Sichuan Normal University , Chengdu, China
                [3] 3College of Resources, Sichuan Agricultural University , Chengdu, China
                [4] 4Sichuan Provincial Cultivated Land Quality and Fertilizer Workstation , Chengdu, China
                [5] 5Sichuan Academy of Forestry , Chengdu, China
                [6] 6State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences , Wuhan, China
                [7] 7Research Center for Carbon Sequestration and Ecological Restoration, Tianfu Yongxing Laboratory , Chengdu, China
                [8] 8Chengdu Academy of Agriculture and Forestry Sciences , Chengdu, China
                Author notes

                Edited by: Shengqiang Wang, Guangxi University, China

                Reviewed by: Linjng Ren, East China Normal University, China

                Xiaolei Sun, Helmholtz Association of German Research Centres (HZ), Germany

                Meng Zhu, Chinese Academy of Sciences (CAS), China

                *Correspondence: Lei Du, dulei_sicau@ 123456outlook.com
                Article
                10.3389/fmicb.2024.1376418
                11039953
                38659977
                a3e4d638-1210-42f4-953a-0b3fdc012e82
                Copyright © 2024 Tang, Li, Bao, Tang, Li, Ding, Luo, Zeng, Liu, Shu, Liu and Du.

                This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

                History
                : 25 January 2024
                : 29 March 2024
                Page count
                Figures: 8, Tables: 1, Equations: 3, References: 48, Pages: 11, Words: 6893
                Funding
                The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This work was supported by National Natural Science Foundation of China (No. 42307351), Start-up Funding from Sichuan Normal University (XJ20210431 and XJ20230384), Key Laboratory of Land Resources Evaluation and Monitoring in Southwest (Sichuan Normal University), Ministry of Education, International Cooperation Fund (TDSYS202313).
                Categories
                Microbiology
                Original Research
                Custom metadata
                Terrestrial Microbiology

                Microbiology & Virology
                ecological restoration,carbon stabilization,arbuscular mycorrhizal fungi,tea bag index,climate change mitigation

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