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Dissolved organic carbon, an indicator of soil bacterial succession in restored wetland under freeze-thaw cycle.

Authors :
Li, Yingxin
Wang, Lixia
Tian, Lei
Zheng, Haifeng
Ou, Yang
Yan, Baixing
Cui, Hu
Bao, Meiwen
Zhang, Shaoqing
Guan, Fachun
Source :
Ecological Engineering. Apr2022, Vol. 177, pN.PAG-N.PAG. 1p.
Publication Year :
2022

Abstract

The moisture availability is of great significance to the physical, chemical and biological processes of soil, however, information regarding how freeze-thaw cycles (FTCs) affect the bacterial community of soil with different moisture contents is limited. In this work, we studied the relationship between FTCs and soil bacterial community under different moisture content (field capacity, FC and saturated moisture content, SMC). The results showed that FTCs decreased the richness and diversity of the soil bacterial community. Bacteria diversity were significantly decreased after the second FTC (FTC2). Thereafter, bacterial diversity with a saturated moisture content returned to the pre-freeze-thaw level, but the recovery of bacterial diversity in soil with the field capacity was lower than that of the saturated moisture content. Frequent FTCs accelerate the turnover of dissolved organic carbon DOC by affecting the carbon metabolism of microbial communities. Adjusting moisture to SMC can increase the stability of carbon. Our results provided reference to for the management of restored wetland. • Bacterial diversity and abundance decreased sharply under second freeze-thaw cycles. • Soil bacteria diversity with saturated moisture content will quickly return to the original level. • Freeze-thaw cycles accelerate the turnover of dissolved organic carbon by effecting bacterial carbon metabolism. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09258574
Volume :
177
Database :
Academic Search Index
Journal :
Ecological Engineering
Publication Type :
Academic Journal
Accession number :
155488878
Full Text :
https://doi.org/10.1016/j.ecoleng.2022.106569