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Organic matter comp...
Organic matter composition and stability in estuarine wetlands depending on soil salinity
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- Wu, Lele (författare)
- Tianjin Univ, China
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- Song, Zhaoliang (författare)
- Tianjin Univ, China;Haihe Lab Sustainable Chem Transformat, China
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- Wu, Yuntao (författare)
- Lishui Univ, China
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- Xia, Shaopan (författare)
- Nanjing Agr Univ, China
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- Kuzyakov, Yakov (författare)
- Univ Goettingen, Germany;RUDN Univ, Russia;Univ Exeter, UK
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- Hartley, Iain P. (författare)
- Kazan Fed Univ, Russia
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- Fang, Yunying (författare)
- Griffith Univ, Australia
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- Yu, Changxun, 1983- (författare)
- Linnéuniversitetet,Institutionen för biologi och miljö (BOM)
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- Wang, Yidong (författare)
- Tianjin Normal Univ, China
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- Chen, Ji (författare)
- Chinese Acad Sci, China;Aarhus Univ, Denmark
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- Guo, Laodong (författare)
- Univ Wisconsin Milwaukee, USA
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- Li, Zimin (författare)
- Chinese Acad Sci, China
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- Zhao, Xiangwei (författare)
- Tianjin Univ, China
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- Yang, Xiaomin (författare)
- Guizhou Univ, China
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- Zhang, Zhenqing (författare)
- Tianjin Normal Univ, China
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- Liu, Shuyan (författare)
- Natl Nat Reserve Management Ctr Liujiang Basin Geo, China
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- Wang, Weiqi (författare)
- Fujian Normal Univ, China
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- Ran, Xiangbin (författare)
- Minist Nat Resources, China
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- Liu, Cong-Qiang (författare)
- Tianjin Univ, China;Haihe Lab Sustainable Chem Transformat, China
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- Wang, Hailong (författare)
- Foshan Univ, China;Guangdong Acad Sci, China
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(creator_code:org_t)
- Elsevier, 2024
- 2024
- Engelska.
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Ingår i: Science of the Total Environment. - : Elsevier. - 0048-9697 .- 1879-1026. ; 945
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Coastal wetlands are key players in mitigating global climate change by sequestering soil organic matter. Soil organic matter consists of less stable particulate organic matter (POM) and more stable mineral -associated organic matter (MAOM). The distribution and drivers of MAOM and POM in coastal wetlands have received little attention, despite the processes and mechanisms differ from that in the upland soils. We explored the distribution of POM and MAOM, their contributions to SOM, and the controlling factors along a salinity gradient in an estuarine wetland. In the estuarine wetland, POM C and N were influenced by soil depth and vegetation type, whereas MAOM C and N were influenced only by vegetation type. In the estuarine wetland, SOM was predominantly in the form of MAOM ( > 70 %) and increased with salinity (70 % -76 %), leading to long-term C sequestration. Both POM and MAOM increased with SOM, and the increase rate of POM was higher than that of MAOM. Aboveground plant biomass decreased with increasing salinity, resulted in a decrease in POM C (46 % - 81 %) and N (52 % -82 %) pools. As the mineral amount and activity, and microbial biomass decreased, the MAOM C (2.5 % -64 %) and N pool (8.6 % -59 %) decreased with salinity. When evaluating POM, the most influential factors were microbial biomass carbon (MBC) and dissolved organic carbon (DOC). Key parameters, including MBC, DOC, soil salinity, soil water content, aboveground plant biomass, mineral content and activity, and bulk density, were identified as influencing factors for both MAOM abundance. Soil water content not only directly controlled MAOM, but together with salinity also indirectly regulated POM and MAOM by controlling microbial biomass and aboveground plant biomass. Our findings have important implications for improving the accumulation and increased stability of soil organic matter in coastal wetlands, considering the global sea level rise and increased frequency of inundation.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Nyckelord
- Particulate organic matter
- Mineral-associated organic matter
- Tidal wetlands
- Sea-level rise
- Blue carbon
- Vegetation habitats
- Salinity gradient
- Miljövetenskap
- Environmental Science
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Wu, Lele
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Song, Zhaoliang
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Wu, Yuntao
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Xia, Shaopan
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Kuzyakov, Yakov
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Hartley, Iain P.
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Fang, Yunying
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Yu, Changxun, 19 ...
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Wang, Yidong
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Chen, Ji
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Guo, Laodong
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Li, Zimin
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Zhao, Xiangwei
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Yang, Xiaomin
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Zhang, Zhenqing
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Liu, Shuyan
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Wang, Weiqi
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Ran, Xiangbin
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Liu, Cong-Qiang
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Wang, Hailong
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