Biogeosciences
Biogeosciences
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Articles | Volume 23, issue 18
Articles | Volume 23, issue 18
https://doi.org/10.5194/bg-23-6671-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-6671-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 18
Research article
 | 
23 Sep 2026
Research article |  | 23 Sep 2026

Profile-wide desalinization is associated with increased deep-soil microbial biomass and reduced iron-bound carbon in coastal wetland restoration

Jingwen Gao, Pengcheng Jiang, Xiaofei Ye, Xingna Lin, Xuexin Shao, Ming Wu, and Niu Li

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Short summary
Coastal wetland restoration often removes invasive plants, but its effects on deep soil carbon are uncertain. We compared plastic mulching and deep tillage for eighteen months in an invaded wetland. Mulching reduced soil salt, increased microbial biomass in deep soil, and coincided with lower carbon and iron-bound carbon through one metre of soil. These results show that restoration methods can affect hidden deep soil carbon, so monitoring should include the whole soil profile.
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