TY - JOUR
T1 - Distribution of organic carbon storage in different salt-marsh plant communities
T2 - A case study at the Yangtze Estuary
AU - Yuan, Yiquan
AU - Li, Xiuzhen
AU - Jiang, Junyan
AU - Xue, Liming
AU - Craft, Christopher B.
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/9/30
Y1 - 2020/9/30
N2 - The high carbon (C) sequestration potentials of coastal wetlands play an important role in mitigating climate change associated with the greenhouse effect. In the present study, soil samples were collected from the 0–30-cm topsoil layers and from 0 to 100-cm cores for the analysis of the spatial dynamics and vertical distribution of organic carbon (OC) and biomass in different vegetation zones in a small tidal basin in Chongming Dongtan wetland. According to the results, sediments in the region were a mixture of terrestrial and marine sources and the proportions of terrestrial components decreased with an increase in depth. In addition, soil properties were quite similar in the top-soil layer. In the study area, the OC concentration was in the 0.7–10.93 g/kg range, which was positively correlated with halophyte biomass and negatively correlated with soil salinity and particle size. Furthermore, OC content decreased with an increase in depth. The OC content in different halophyte communities was in the order of Phragmites australis community > Mixed community > sedge community, and was consistent with the gross biomass. The total C sequestered of 100-cm depth in the area was 31,177 ton, with the P. australis community, mixed community, sedge community, and water sequestering 57.7, 49.2, 25.5 t/ha, and 8 t/tidal cycle, respectively. Tidal marshes in Chongming Dongtan exhibited a high C sequestration capacity, indicating that they play a major role in the C cycle in the Yangtze Estuary.
AB - The high carbon (C) sequestration potentials of coastal wetlands play an important role in mitigating climate change associated with the greenhouse effect. In the present study, soil samples were collected from the 0–30-cm topsoil layers and from 0 to 100-cm cores for the analysis of the spatial dynamics and vertical distribution of organic carbon (OC) and biomass in different vegetation zones in a small tidal basin in Chongming Dongtan wetland. According to the results, sediments in the region were a mixture of terrestrial and marine sources and the proportions of terrestrial components decreased with an increase in depth. In addition, soil properties were quite similar in the top-soil layer. In the study area, the OC concentration was in the 0.7–10.93 g/kg range, which was positively correlated with halophyte biomass and negatively correlated with soil salinity and particle size. Furthermore, OC content decreased with an increase in depth. The OC content in different halophyte communities was in the order of Phragmites australis community > Mixed community > sedge community, and was consistent with the gross biomass. The total C sequestered of 100-cm depth in the area was 31,177 ton, with the P. australis community, mixed community, sedge community, and water sequestering 57.7, 49.2, 25.5 t/ha, and 8 t/tidal cycle, respectively. Tidal marshes in Chongming Dongtan exhibited a high C sequestration capacity, indicating that they play a major role in the C cycle in the Yangtze Estuary.
KW - Chongming Dongtan
KW - Organic carbon content
KW - Organic carbon storage
KW - Salt marsh vegetation
KW - Vegetation biomass
UR - https://www.scopus.com/pages/publications/85088640652
U2 - 10.1016/j.ecss.2020.106900
DO - 10.1016/j.ecss.2020.106900
M3 - 文章
AN - SCOPUS:85088640652
SN - 0272-7714
VL - 243
JO - Estuarine, Coastal and Shelf Science
JF - Estuarine, Coastal and Shelf Science
M1 - 106900
ER -
