长江源查旦湿地表层土壤有机碳空间分布  

Spatial Distribution of Surface Soil Organic Carbon of Chadan Wetland in the Source Region of Yangtze River

作　　者：张双印 徐平[3] 王密[4] 赵保成 付重庆 郑航 徐坚[1] 赵登忠[6] 程学军[1] 郑学东[1] ZHANG Shuang-yin;XU Ping;WANG Mi;ZHAO Bao-cheng;FU Chong-qing;ZHENG Hang;XU Jian;ZHAO Deng-zhong;CHENG Xue-jun;ZHENG Xue-dong(Spatial Information Technology Application Department,Changjiang River Scientific Research Institute,Wuhan 430010,China;Wuhan Research Center on Intelligent River Basin Engineering Technology,Wuhan 430010,China;Field Scientific Observation Center,Changjiang River Scientific Research Institute,Wuhan 430010,China;State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China;Changjiang Survey,Planning and Design Research Co.,Ltd.,Wuhan 430010,China;International Cooperation Department,Changjiang River Scientific Research Institute,Wuhan 430010,China)

机构地区：[1]长江科学院空间信息技术应用研究所,武汉430010 [2]武汉市智慧流域工程技术研究中心,武汉430010 [3]长江科学院野外科学观测中心,武汉430010 [4]武汉大学测绘遥感信息工程国家重点实验室,武汉430079 [5]长江勘测规划设计研究有限责任公司,武汉430010 [6]长江科学院科技交流与国际合作处,武汉430010

出　　处：《长江科学院院报》2025年第3期193-201,共9页Journal of Changjiang River Scientific Research Institute

基　　金：中央级公益性科研院所基本科研业务费项目(CKSF2023296/KJ);水利部重大科技项目(SKS-2022039);国家自然科学基金重点项目(U2240224);湖南省重大水利科技项目(XSKJ2022068-12)。

摘　　要：高寒湿地是一个巨大的碳库,对于高原野生动物栖息和生态安全维护具有重要意义。当前研究主要集中在海拔4000 m以下,对于海拔>4000 m高寒湿地表层土有机碳的研究仍待加强。基于长江源海拔最高(平均海拔>4500 m)的查旦湿地20个监测点共60个样方的表层土采样化验,分析了高寒湿地表层土有机碳含量和有机碳占比的空间分布,并探究干流、南北岸支流的空间差异。结果表明查旦湿地表层土有机碳的含量在0.54%~18.47%之间,平均值为4.78%,在总碳含量中的占比高于80%,总碳、总有机碳在南北岸支流的空间相关性相反。研究加深了我们对高寒湿地表层土有机碳空间分布差异的理解,为进一步估算高海拔高寒湿地碳汇储量提供了前期探索和验证数据。Alpine wetlands serve as substantial carbon sinks and play a crucial role in providing habitats for wildlife and maintaining ecological security on the plateau.Current research predominantly focuses on areas below 4000 meters in altitude,while studies on the surface soil organic carbon(SOC)of alpine wetlands above 4000 meters require further enhancement.In this study,we analyzed the spatial distribution of surface SOC contents and their proportions in the total carbon of alpine wetlands.We utilized samples from 20 monitoring sites(with 3 replicates at each site)in the Chadan wetland,the highest-elevation wetland(average elevation over 4500 m)in the source region of the Yangtze River.Additionally,we explored the spatial differences among different tributaries.Results indicated that the surface SOC content in the Chadan wetland ranged from 0.54% to 18.47%,with an average of 4.78%.Moreover,its proportion in the total carbon exceeded 80%.The spatial correlations of total carbon and total organic carbon in tributaries on the north and south banks are opposite.This study advanced our understanding of the spatial distribution of surface SOC in alpine wetlands and provided preliminary exploration and validation data for more accurate estimations of carbon sink storage in high-altitude alpine wetlands.

关 键 词：长江源 高寒湿地 查旦湿地 总有机碳 碳赋存 

分 类 号：S812[农业科学—草业科学] K903[农业科学—畜牧学]