Plant community,geomorphology,and macrobenthos as drivers of spatial variations in soil carbon and nitrogen in a coastal shoal  

作　　者：Qing Lyu Ke Zhou Shi-Xian Liu Hai-Feng Cheng Wei Zhang Yuan Tian Ke-Hua Zhu Hua-Yu Chen Zeng-Feng Li Zeng Zhou Zhen-Ming Ge 

机构地区：[1]State Key Laboratory of Estuarine and Coastal Research,Institute of Eco-Chongming,Center for Blue Carbon Science and Technology,East China Normal University,Shanghai,China [2]Jiangsu Key Laboratory of Coastal Ocean Resources Development and Environment Security,Hohai University,Nanjing 210024,China [3]Key Laboratory of Estuarine and Coastal Project,Ministry of Transport,Shanghai Estuarine and Coastal Science Research Center,Shanghai,China [4]Shanghai Jiuduansha Wetland Nature Reserve Administrative Affair Center,Shanghai,China [5]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China [6]Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station,Ministry of Education&Shanghai Science and Technology Committee,Shanghai,China

出　　处：《Anthropocene Coasts》2024年第1期425-439,共15页人新世海岸(英文)

基　　金：funded by the National Key R&D Program of China(2023YFC3208500 and 2023YFE0113104);the National Natural Science Foundation of China(U2040204 and 42141016);the grants from Shanghai Municipal Science and Technology Commission(22dz1209600);the Jiangsu Key Laboratory of Coast Ocean Resources Development and Environmental Security,Hohai University(Grant No.JSCE202301);the Project of the Zhejiang Water Conservancy Bureau(RB2414).

摘　　要：Coastal salt marsh wetlands are crucial reservoirs of soil carbon(C)and nitrogen(N).However,the effects of plant type,geomorphology,and macrobenthos on spatial variations in soil C and N in coastal wetlands remain unclear.In this study,the spatial distribution of soil C and N components was investigated in a coastal wetland(Jiuduansha Shoal)in the Yangtze Estuary,and plant type distribution,plant biomass,soil properties,and macrobenthos species and biomass along the geomorphological gradient were measured.The results showed that the amounts and stocks of soil total C,soil organic C,soil total N,and soil microbial biomass C and N at the Spartina alterniflora(SA)and Phragmites australis(PA)sites were significantly higher than those at the bare mudflat(BM)sites.The soil and microorganism C and N variables showed a remarkable increasing trend from low-to high-elevation sites.The abundance of macrobenthos at the Scirpus mariqueter site was the highest among the plant communities and was significantly higher than that at the Zizania latifolia(ZL)and BM sites.The air-free dry weight(AFDW)of macrobenthos in the PA community was the highest among the communities.The variability in soil C and N was mainly sensitive to plant biomass,soil water content,bulk density,macrobenthos AFDW,particle size,electrical conductivity,and nutrient levels.We suggest that the synergetic effects of biotic and abiotic factors in the intertidal environment need to be fully considered in assessing and managing the C and N pools of coastal salt marshes in East China.

关 键 词：Coastal wetlands Blue carbon Spatial heterogeneity Marsh plants MACROBENTHOS 

分 类 号：Q17[生物学—水生生物学]