MOU Xiaojie, LIU Xingtu, SUN Zhigao, TONG Chuan, HUANG Jiafang, WAN Siang, WANG Chun, WEN Bolong. 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. doi: 10.1007/s11769-018-0956-4
Citation: MOU Xiaojie, LIU Xingtu, SUN Zhigao, TONG Chuan, HUANG Jiafang, WAN Siang, WANG Chun, WEN Bolong. 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. doi: 10.1007/s11769-018-0956-4

Effects of Anthropogenic Disturbance on Sediment Organic Carbon Mineralization Under Different Water Conditions in Coastal Wetland of a Subtropical Estuary

doi: 10.1007/s11769-018-0956-4
Funds:  Under the auspices of National Basic Research Program of China (No. 2012CB956100), National Natural Science Foundation of China (No. 41301085), the Key Foundation of Science and Technology Department of Fujian Province (No. 2016R1032-1)
More Information
  • Corresponding author: LIU Xingtu.E-mail:lxtmxh@163.com
  • Received Date: 2017-05-12
  • Rev Recd Date: 2017-08-10
  • Publish Date: 2018-06-27
  • 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 (R2 > 0.91) to the first-order kinetic model Ct=C0 (1-exp(-kt)). The kinetic parameters C0, k and C0k were significantly affected by human disturbance and water conditions. In addition, the total amount of mineralized C (in 49 d) was positively related to C0, C0k 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.
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Effects of Anthropogenic Disturbance on Sediment Organic Carbon Mineralization Under Different Water Conditions in Coastal Wetland of a Subtropical Estuary

doi: 10.1007/s11769-018-0956-4
Funds:  Under the auspices of National Basic Research Program of China (No. 2012CB956100), National Natural Science Foundation of China (No. 41301085), the Key Foundation of Science and Technology Department of Fujian Province (No. 2016R1032-1)
    Corresponding author: LIU Xingtu.E-mail:lxtmxh@163.com

Abstract: 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 (R2 > 0.91) to the first-order kinetic model Ct=C0 (1-exp(-kt)). The kinetic parameters C0, k and C0k were significantly affected by human disturbance and water conditions. In addition, the total amount of mineralized C (in 49 d) was positively related to C0, C0k 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.

MOU Xiaojie, LIU Xingtu, SUN Zhigao, TONG Chuan, HUANG Jiafang, WAN Siang, WANG Chun, WEN Bolong. 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. doi: 10.1007/s11769-018-0956-4
Citation: MOU Xiaojie, LIU Xingtu, SUN Zhigao, TONG Chuan, HUANG Jiafang, WAN Siang, WANG Chun, WEN Bolong. 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. doi: 10.1007/s11769-018-0956-4
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