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Effects of Anthropogenic Disturbance on Sediment Organic Carbon Mineralization Under Different Water Conditions in Coastal Wetland of a Subtropical Estuary
X. J. Mou, X. T. Liu, Z. G. Sun, C. Tong, J. F. Huang, S. Wan, C. Wang and B. L. Wen
2018
发表期刊Chinese Geographical Science
卷号28期号:3页码:400-410
其他摘要The changes in soil organic carbon (C) mineralization as affected by anthropogenic disturbance directly determine the role of soils as C source or sink in the global C budget. The objectives of this study were to investigate the effects of anthropogenic disturbance (aquaculture pond, pollutant discharge and agricultural activity) on soil organic C mineralization under different water conditions in the Minjiang River estuary wetland, Southeast China. The results showed that the organic C mineralization in the wetland soils was significantly affected by human disturbance and water conditions (P < 0.001), and the interaction between human disturbance activities and water conditions was also significant (P < 0.01). The C mineralization rate and the cumulative mineralized carbon dioxide-carbon (CO2-C) (at the 49th day) ranked from highest to lowest as follows: Phragmites australis wetland soil > aquaculture pond sediment > soil near the discharge outlet > rice paddy soil. This indicated that human disturbance inhibited the mineralization of C in soils of the Minjiang River estuary wetland, and the inhibition increased with the intensity of human disturbance. The data for cumulative mineralized CO2-C showed a good fit (R-2 > 0.91) to the first-order kinetic model C-t = C-0 (1-exp(-kt)). The kinetic parameters C-0, k and C(0)k were significantly affected by human disturbance and water conditions. In addition, the total amount of mineralized C (in 49 d) was positively related to C-0, C(0)k and electrical conductivity of soils. These findings indicated that anthropogenic disturbance suppressed the organic C mineralization potential in subtropical coastal wetland soils, and changes of water pattern as affected by human activities in the future would have a strong influence on C cycling in the subtropical estuarine wetlands.
文献类型期刊论文
条目标识符http://ir.iga.ac.cn/handle/131322/9147
专题湿地生态系统管理学科组
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GB/T 7714
X. J. Mou, X. T. Liu, Z. G. Sun, C. Tong, J. F. Huang, S. Wan, C. Wang and B. L. Wen. Effects of Anthropogenic Disturbance on Sediment Organic Carbon Mineralization Under Different Water Conditions in Coastal Wetland of a Subtropical Estuary[J]. Chinese Geographical Science,2018,28(3):400-410.
APA X. J. Mou, X. T. Liu, Z. G. Sun, C. Tong, J. F. Huang, S. Wan, C. Wang and B. L. Wen.(2018).Effects of Anthropogenic Disturbance on Sediment Organic Carbon Mineralization Under Different Water Conditions in Coastal Wetland of a Subtropical Estuary.Chinese Geographical Science,28(3),400-410.
MLA X. J. Mou, X. T. Liu, Z. G. Sun, C. Tong, J. F. Huang, S. Wan, C. Wang and B. L. Wen."Effects of Anthropogenic Disturbance on Sediment Organic Carbon Mineralization Under Different Water Conditions in Coastal Wetland of a Subtropical Estuary".Chinese Geographical Science 28.3(2018):400-410.
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