TY - JOUR
T1 - Microbial necromass carbon in estuarine tidal wetlands of China
T2 - Influencing factors and environmental implication
AU - Wei, Jine
AU - Zhang, Fenfen
AU - Ma, Dongliang
AU - Zhang, Jing
AU - Zheng, Yanling
AU - Dong, Hongpo
AU - Liang, Xia
AU - Yin, Guoyu
AU - Han, Ping
AU - Liu, Min
AU - Hou, Lijun
N1 - Publisher Copyright:
© 2023
PY - 2023/6/10
Y1 - 2023/6/10
N2 - Microbial necromass is an important component of the stable soil organic carbon (SOC) pool. However, little is known about the spatial and seasonal patterns of soil microbial necromass and their influencing environmental factors in estuarine tidal wetlands. In the present study, amino sugars (ASs) as biomarkers of microbial necromass were investigated along the estuarine tidal wetlands of China. Microbial necromass carbon (C) contents were in the range of 1.2–6.7 mg g−1 (3.6 ± 2.2 mg g−1, n = 41) and 0.5–4.4 mg g−1 (2.3 ± 1.5 mg g−1, n = 41), which accounted for 17.3–66.5 % (44.8 % ± 16.8 %) and 8.9–45.0 % (31.0 % ± 13.7 %) of the SOC pool in the dry (March to April) and wet (August to September) seasons, respectively. At all sampling sites, fungal necromass C predominated over bacterial necromass C as a component of microbial necromass C. Compared to bacterial necromass C, fungal necromass C showed a stronger connection with ferrous oxides (Fe2+) and total Fe concentrations. Both fungal and bacterial necromass C contents revealed large spatial heterogeneity and declined in the estuarine tidal wetlands with the increase in latitude. Statistical analyses showed that the increases in salinity and pH in the estuarine tidal wetlands suppressed the accumulation of soil microbial necromass C.
AB - Microbial necromass is an important component of the stable soil organic carbon (SOC) pool. However, little is known about the spatial and seasonal patterns of soil microbial necromass and their influencing environmental factors in estuarine tidal wetlands. In the present study, amino sugars (ASs) as biomarkers of microbial necromass were investigated along the estuarine tidal wetlands of China. Microbial necromass carbon (C) contents were in the range of 1.2–6.7 mg g−1 (3.6 ± 2.2 mg g−1, n = 41) and 0.5–4.4 mg g−1 (2.3 ± 1.5 mg g−1, n = 41), which accounted for 17.3–66.5 % (44.8 % ± 16.8 %) and 8.9–45.0 % (31.0 % ± 13.7 %) of the SOC pool in the dry (March to April) and wet (August to September) seasons, respectively. At all sampling sites, fungal necromass C predominated over bacterial necromass C as a component of microbial necromass C. Compared to bacterial necromass C, fungal necromass C showed a stronger connection with ferrous oxides (Fe2+) and total Fe concentrations. Both fungal and bacterial necromass C contents revealed large spatial heterogeneity and declined in the estuarine tidal wetlands with the increase in latitude. Statistical analyses showed that the increases in salinity and pH in the estuarine tidal wetlands suppressed the accumulation of soil microbial necromass C.
KW - Amino sugars
KW - Bacterial necromass carbon
KW - Fungal necromass carbon
KW - Wetland soils
UR - https://www.scopus.com/pages/publications/85149970151
U2 - 10.1016/j.scitotenv.2023.162566
DO - 10.1016/j.scitotenv.2023.162566
M3 - 文章
C2 - 36889404
AN - SCOPUS:85149970151
SN - 0048-9697
VL - 876
JO - Science of the Total Environment
JF - Science of the Total Environment
M1 - 162566
ER -