Distribution Characteristics and Main Influencing Factors of Organic Carbon in Sediments of Spartina Alterniflora Wetlands along the Northern Jiangsu Coast, China
Author:
Zhang Aijuan1, Lv Wenlong1, Shu Qiang123, Chen Zhiling1, Du Yifan1, Ye Hui1, Xu Linlu1, Liu Shengzhi1
Affiliation:
1. School of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China 2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China 3. School of Geography, Nanjing Normal University, Nanjing 210023, China
Abstract
In this study, columnar sediment samples were collected from north to south along the northern Jiangsu coast, China, under Spartina alterniflora vegetation in four sample areas: Chuandong Port (Area-1), Tiaozini Scenic Area (Area-2), Yangkou Town (Area-3), and Meiledi Marine Park (Area-4). Organic carbon (OC), nutrient elements including total nitrogen (TN), total phosphorus (TP), and total sulfur (TS), and physicochemical properties including pH, salinity (Sal), moisture content (MC), and bulk density (BD) were measured. Pearson’s correlation analysis was performed to explore the correlation between OC content and sedimentary physicochemical indexes, and the partial least squares regression (PLSR) model was used to analyze the factors affecting changes in OC content. The results found that the OC content of columnar sediments of S. alterniflora decreased with increasing depth in all four areas. The OC content in the four sample areas was mainly affected by the TN, pH, MC, TP, and burial depth. In particular, TN, MC, TP, TS, and clay content positively affected OC, whereas burial depth, pH, silt content, BD, sand content, and Sal negatively affected OC. The results of this study provide a valuable reference for evaluating the role of coastal wetlands in the global carbon cycle.
Funder
Ecology and Environment Department of Jiangsu Province Interdisciplinary research projects of Nanjing Normal University
Reference63 articles.
1. Pörtner, H.O., Scholes, R.J., Agard, J., Archer, E., Arneth, A., Bai, X., Barnes, D., Burrows, M., Chan, L., and Cheung, W. (2021). Scientific Outcome of the IPBES-IPCC Cosponsored Workshop on Biodiversity and Climate Change (Version 5), IPBES Secretariat. 2. Current systematic carbon-cycle observations and the need for implementing a policy-relevant carbon observing system;Ciais;Biogeosciences,2014 3. Nellemann, C., Corcoran, E., Duarte, C.M., Valdes, L., Deyoung, C., Fonseca, L., and Grimsditch, G. (2009). Blue Carbon. The Role of Healthy Oceans in Binding Carbon. A Rapid Response Assessment, United Nations Environment Programme, GRID-Arendal. 4. Modeling northern peatland decomposition and peat accumulation;Frolking;Ecosystems,2001 5. Tian, P., Cao, L., Li, J., Pu, R., Liu, Y., Zhang, H., and Wang, C. (2022). Ecosystem Stability Assessment of Yancheng Coastal Wetlands, a World Natural Heritage Site. Land, 11.
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