| 辽河口芦苇湿地净生态系统CO2交换及其环境调控 |
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| 引用本文： | 邢庆会,上官魁星,廖国祥,刘长安,雷威,张悦. 辽河口芦苇湿地净生态系统CO2交换及其环境调控[J]. 海洋环境科学, 2021, 40(2): 228-234. DOI: 10.12111/j.mes.20200079 |
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| 作者姓名： | 邢庆会 上官魁星 廖国祥 刘长安 雷威 张悦 |
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| 作者单位： | 国家海洋环境监测中心 国家环境保护海洋生态环境整治修复重点实验室，辽宁 大连 116023 |
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| 基金项目： | 国家海洋环境监测中心博士启动基金项目（2019-A-04）；国家自然科学基金项目（41806187）；福建省海洋生态保护与修复重点实验室开放基金项目（EPR2021002）；辽宁省博士科研启动基金计划项目(2020-BS-291) |
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| 摘 要： | 采用涡度相关法，对2018年下半年辽河口国家级自然保护区内滨海芦苇湿地的净生态系统CO2交换（NEE）、总初级生产力（GPP）和生态系统呼吸（Reco）进行测量分析，研究海洋保护区内典型芦苇湿地生态系统-大气CO2交换的变化规律及其环境调控。结果表明，有芦苇生长的7月－10月，各月NEE日变化曲线呈相似的“U”形，但变化幅度存在较大差异；非芦苇生长季的11月－12月，生态系统表现为微弱的净CO2释放，NEE日变化轨迹与温度波动一致。该芦苇湿地生态系统的GPP、Reco和NEE均呈现7月－10月数值较大、11月－12月数值较小的规律。7月－10月，白天CO2交换主要受芦苇光合作用的影响，各月白天NEE与光合有效辐射（PAR）之间呈直角双曲线关系，PAR可以解释白天NEE变化的45%～54%。7月－12月，夜间Reco与气温呈指数关系，气温可以解释Reco变化的62%，生态系统呼吸敏感性（Q10）为2.20。2018年下半年，辽河口国家级自然保护区内芦苇湿地生态系统累计GPP总值达到359.67 g C/m2，累计Reco达到278.29 g C/m2，总净固碳量为81.38 g C/m2。
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| 关 键 词： | 涡度相关 净生态系统CO2交换 芦苇湿地 辽河口 |
| 收稿时间： | 2020-03-29 |
Net ecosystem CO2 exchange and its environmental regulation in the Liao river estuarine reed wetland |
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| Qing-hui XING,Kui-xing SHANG-GUAN,Guo-xiang LIAO,Chang-an LIU,Wei LEI,Yue ZHANG. Net ecosystem CO2 exchange and its environmental regulation in the Liao river estuarine reed wetland[J]. Marine Environmental Science, 2021, 40(2): 228-234. DOI: 10.12111/j.mes.20200079 |
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| Authors: | Qing-hui XING Kui-xing SHANG-GUAN Guo-xiang LIAO Chang-an LIU Wei LEI Yue ZHANG |
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| Affiliation: | State Environmental Protection Key Laboratory of Marine Ecosystem Restoration, National Marine Environmental Monitoring Center, Dalian 116023, China |
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| Abstract: | The net ecosystem CO2 exchange (NEE), gross primary productivity (GPP) and ecosystem respiration (Reco) in the Liao river estuarine reed wetland of China were measured and analyzed by using eddy covariance technique from July to December of 2018. And then the variation patterns of NEE and related affecting factors were investigated. The results indicated that the diurnal variation curves of NEE in different months (from July to October) of the growing season showed a similar U shape, but the magnitudes of the diurnal variation of NEE were quite different. In November and December, the ecosystem showed weak net CO2 releases, the diurnal variation trajectories of NEE were consistent with the temperature fluctuations. The GPP, Reco and NEE values were all higher in growing season (from July to October) and lower in non-growing season (from November to December) in the reed wetland. From July to October, CO2 exchange in daytime was mainly affected by the photosynthesis of reed, and there were rectangular hyperbolic relationships between daytime NEE and photosynthetically active radiation (PAR). PAR could explain 45%～54% of the variations of the daytime NEE. From July to December, the nighttime Reco was exponentially correlated with air temperature. Air temperature could explain 62% of the variation of Reco, and the temperature sensitivity of the ecosystem respiration (Q10) was 2.20. In the second half of 2018, the Liao river estuarine reed wetland ecosystem was an obvious carbon sink (?81.38 g C/m2) with a cumulative emission of 278.29 g C/m2 and a cumulative aborption of 359.67 g C/m2. |
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