| 植物调节湿地CO2和CH4排放对淹水增强的响应 |
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| 引用本文： | 谭凤凤,罗敏,张昌威,陈欣,黄佳芳.植物调节湿地CO2和CH4排放对淹水增强的响应[J].中国环境科学,2023,43(1):424-435. |
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| 作者姓名： | 谭凤凤 罗敏 张昌威 陈欣 黄佳芳 |
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| 作者单位： | 1. 福建师范大学地理科学学院, 湿润亚热带生态地理过程教育部重点实验室, 福建 福州 350007;2. 福州大学环境与安全工程学院, 福建 福州 350116;3. 福建闽江河口湿地生态系统国家定位观测研究站(国家林业和草原局), 福建 福州 350215 |
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| 基金项目： | 国家自然科学基金面上项目(32071598);福建省基金面上项目(2020J01503);福建省林业科技项目(2021FKJ30) |
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| 摘 要： | 在闽江河口鳝鱼滩潮汐沼泽湿地设置有植物与无植物2种中宇宙,每种中宇宙设置对照(CK)、CK-20cm、CK-40cm 3种高程处理,以此模拟研究淹水增强对有无植物2 种中宇宙的CO2和CH4排放通量的影响.结果表明,淹水增强未显著改变植物的总生物量和植物株高,但增加植物地下生物量,减少植物地上生物量.在有植物中宇宙中,土壤氧化还原电位(ORP)和溶解性有机碳(DOC)浓度随着淹水增强而增加.在无植物中宇宙中,DOC浓度也随着淹水增强而增加,但土壤ORP随淹水增强变化不显著.与CK相比,在CK-20cm和CK-40cm 2种高程处理中,有植物中宇宙中CO2排放通量分别增加43%和61%,而CH4排放通量则分别增加66%和84%.在无植物中宇宙中,CO2和CH4的排放通量随着淹水增强无显著变化.未来海平面上升50~100a内,有植被的潮汐沼泽湿地综合增温潜势会增加,土壤有机碳储量会显著下降;无植被的潮汐沼泽湿地综合增温潜势将下降,土壤有机碳储量不会显著改变.
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| 关 键 词： | 淹水增强 CO2和CH4排放通量 海平面上升 氧化还原电位 潮汐沼泽湿地 闽江河口 |
| 收稿时间： | 2022-05-16 |
Plants moderate the effects of emission fluxes of CO2 and CH4 on increased flooding in wetland soils |
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| TAN Feng-feng,LUO Min,ZHANG Chang-wei,CHEN Xin,HUANG Jia-fang.Plants moderate the effects of emission fluxes of CO2 and CH4 on increased flooding in wetland soils[J].China Environmental Science,2023,43(1):424-435. |
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| Authors: | TAN Feng-feng LUO Min ZHANG Chang-wei CHEN Xin HUANG Jia-fang |
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| Institution: | 1. School of Geographical Sciences, Fujian Normal University, Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350007;2. College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350116, China;3. Wetland Ecosystem Research Station of Minjiang Estuary, National Forestry and Grassland Administration, Fuzhou 350215, China |
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| Abstract: | Two mesocosms, with and without plants, were established in the tidal wetlands of the Minjiang Estuary, Southeast China. Each mesocosm contained three elevation treatments: control (CK), CK-20cm, and CK-40cm. The CO2 and CH4 emission fluxes under each elevation treatment in the planted and unplanted mesocosms were investigated. Overall, the results showed that increased flooding did not significantly change the total biomass or stem heights of the plants, but it increased the belowground biomass and decreased the aboveground biomass. In the planted mesocosms, the soil redox potential (ORP) and dissolved organic carbon (DOC) concentration increased with increasing flooding. In the unplanted mesocosms, the DOC concentration also increased with increasing flooding, but the soil ORP did not change. In the planted mesocosms, compared to the CK treatment, CO2 emission flux increased by 43% and 61%, respectively and CH4 emission flux increased by 66% and 84%, respectively for the CK-20cm and CK-40cm treatments. In the unplanted mesocosms, the emission fluxes of CO2 and CH4 did not significantly change with increasing flooding. Within 50 to 100 years of sea level rises in the future, the sustained-flux global warming potential of vegetated tidal wetland will increase, while the soil organic carbon storage will decrease. Conversely, in unvegetated tidal wetlands, the sustained-flux global warming potential will decrease, while the storage of soil organic carbon will not change. |
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| Keywords: | increased flooding CO2 and CH4 eflux sea level rise redox potential tidal wetland Minjiang Estuary |
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