辽河三角洲河口芦苇沼泽湿地植被固碳潜力  

Carbon sequestration potential of a Phragmites salt marsh in the Liaohe River estuarine wetland

作　　者：陈吉龙[1,2] 何蕾[3] 温兆飞[1] 寥华军 王炳亮[2] 崔林林[2] 李国胜[2,4] CHEN Jilong HE Lei WEN Zhaofei LIAO Huajun WANG Bingliang CUI Linlin LI Guosheng(Chongqing Institute of Green and Intelligent Technology, Chongqing 400714, China Institute of Geographic Sciences and Natural Resources Research, Beijing 1013101, China Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Nanchang 330000, China Key Laboratory of Coastal Wetland Biogeoseiences, China Geologic Survey, Qingdao 266071, China)

机构地区：[1]中国科学院重庆绿色智能技术研究院,重庆400714 [2]中国科学院地理科学与资源研究所,北京100101 [3]鄱阳湖湿地与流域研究教育部重点实验室,南昌330000 [4]中国地质调查局滨海湿地生物地质重点实验室,青岛266071

出　　处：《生态学报》2017年第16期5402-5410,共9页Acta Ecologica Sinica

基　　金：国家自然科学基金(41401051;41501096);中国科学院西部之光项目;中国地质调查局地质调查项目(GZH201200503;201511057);重庆基础与前沿项目(cstc2015jcyj A00007);涪陵区科技计划项目(2016ABB1040);鄱阳湖湿地与流域研究教育部重点实验室开放基金项目(ZK2015001)

摘　　要：增加陆地生态系统碳汇是一种有效应对CO2浓度升高的措施。河口湿地是一类特殊的陆地生态系统,是生产力最高的生态系统之一。研究河口湿地的固碳潜力对准确评估河口湿地碳汇、发挥和提高湿地固碳功能具有重要意义。通过野外调查和数值模型,量化研究了辽河三角洲河口沼泽湿地的植被固碳潜力。根据区域的实际情况,将植被的固碳潜力分为湿地演替、人工灌溉苇田和气候变化的潜力。研究结果表明辽河三角洲河口沼泽湿地植被具有很高的固碳潜力,翅碱蓬(Suaeda pterantha)群落扩张每年可递增固碳潜力0.053—0.07Gg C,滩涂转变为芦苇(Phragmites australis)沼泽每年可递增固碳潜力0.07Gg C,芦苇、獐毛草甸(Aeluropus sinensis)演替为芦苇沼泽的固碳潜力为17.2 Gg C/a,通过灌溉管理措施,芦苇沼泽的固碳潜力为474.6—544.6 Gg C/a。根据未来气候变化情景和预测结果,到2030年、2050年、2100年,芦苇沼泽湿地的固碳潜力分别为576.9—655.1Gg C/a,603.3—684.1Gg C/a,680.9—769.4Gg C/a,其中由人工灌溉苇田的潜力最大。Enhancing the carbon sink of terrestrial ecosystems has been suggested as a useful measure to ameliorate the greenhouse effect. Estuarine wetlands, characterized by high net primary productivity （NPP）, have the highest carbon sequestration reported for terrestrial ecosystems. However, owing to the dynamic and complex environmental factors in estuarine wetlands, the enhancement of their carbon sink has not been well documented, and the amount of the carbon sequestration potential of estuarine wetlands remains unknown. Therefore, it is fundamental to investigate the carbon sequestration potential of estuarine wetlands to assess and enhance their carbon sink. The main objective of this study was to investigate the carbon sequestration potential of plants for Phragmites salt marshes in the Liaohe River estuarine wetland using field observations and numerical modeling. According to the practice managements and environmental characteristics in the Liaohe River estuarine wetland, the carbon sequestration potential of plants can be classified by wetland plant succession, Phragmites field irrigation, and the effect of climate change. The carbon sequestration potential of plant succession was calculated using the area expansion by tidal deposition and NPP. The ratio of tidal deposition was obtained from the LiaoNing Province Geological Monitoring Report, and the NPP was observed at field sampling sites. The carbon sequestration potential of Phragmites field irrigation was determined by the area of Phragmites fields and the maximum Phragmites NPP, which was modeled with the relationship between NPP and soil moisture, salinity, and irrigation depth. Soil moisture and salinity were measured using a WET Sensor, and irrigation depth was obtained from the Liaohe River Estuarine Wetland Management Office. The carbon sequestration potential of climate change was modeled using the Carnegie Ames Stanford Approach （CASA） model. The parameters in the CASA model were measured using a Moderate Resolution Imaging Spectroradiomete

关 键 词：固碳潜力 净初级生产力 人工灌溉 芦苇沼泽 辽河三角洲 

分 类 号：Q948.1[生物学—植物学]