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 | |
刊名 | Chinese Geographical Science |
2018 | |
卷号 | 28期号:3页码:400-410 |
通讯作者 | 刘兴土 |
中文摘要 | 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. |
内容类型 | 期刊论文 |
源URL | [http://ir.iga.ac.cn/handle/131322/8792] |
专题 | 东北地理与农业生态研究所_湿地生态系统管理学科组_期刊论文 |
推荐引用方式 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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