大宁河消落带植物多样性和土壤碳氮磷分布特征  

Plant Diversity and Soil Carbon,Nitrogen and Phosphorus Distribution in Water Level Fluctuating Zone of Daning River

作　　者：谭慧月 李姗泽 陈晴空[1] 温洁 陈敏 贾焯越 包宇飞 王雨春[2] TAN Huiyue;LI Shanze;CHEN Qingkong;WEN Jie;CHEN Min;JIA Zhuoyue;BAO Yufei;WANG Yuchun(Chongqing Engineering Laboratory of Environmental&Hydraulic Engineering,Chongqing Jiaotong University,Chongqing 400074,P.R.China;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute ofWater Resources and Hydropower Research,Beijing 100038,P.R.China;Yangtze Eco-Environment Engineering Research Center,China Three Gorges Corporation,Wuhan 430014,P.R.China)

机构地区：[1]重庆交通大学,环境水利工程重庆市工程实验室,重庆400074 [2]中国水利水电科学研究院,流域水循环模拟与调控国家重点实验室,北京100038 [3]中国长江三峡集团有限公司,长江生态环境工程研究中心,湖北武汉430014

出　　处：《水生态学杂志》2025年第2期22-32,共11页Journal of Hydroecology

基　　金：国家重点研发计划(2023YFC3205900);中国科协第八届青托工程项目(2022QNRC001);中国长江三峡集团有限公司资助(201903144);重庆市研究生联合培养基地项目(JDLHPYJD2022005)。

摘　　要：研究周期性水位涨落对三峡库区大宁河消落带植物多样性和土壤碳(C)、氮(N)、磷(P)分布特征的影响,为三峡库区消落带生态恢复提供参考。2021年8月对大宁河消落带150~175 m及175m以上水位高程的植物和土壤进行了调查与采样,探究不同水位高程植物优势物种、多样性以及土壤有机碳(SOC)、总氮(TN)和总磷(TP)分布特征,植物生物量和多样性与水位高程、土壤养分之间的关系。结果表明(:1)不同水位高程优势物种不同,豚草(Ambrosia artemisiifolia)、狗尾草(Setaria viridis)和狗牙根(Cynodon dactylon)分别为175 m以上、175 m和150~170 m水位高程的绝对优势物种,植物多样性随水位高程的上升呈增加趋势(;2)土壤SOC和TP含量随水位高程上升呈增加趋势且均在175 m水位高程达最大值,TN含量呈先增加后减少的趋势在170 m水位高程处取得最大值,SOC、TN、TP含量均随土层深度增加而减少(;3)植物生物量与水位高程、SOC和TP含量呈负相关,与TN含量呈正相关,植物多样性指数与水位高程、SOC、TN、TP含量均呈正相关。In this study,we explored the impact of periodic water level fluctuations on plant diversity and soil carbon(C),nitrogen(N),and phosphorus(P)distribution in water level fluctuating zone of the Daning River in the Three Gorges Reservoir area,aiming to provide a reference for ecological restoration in the water level fluctuating zone of the Three Gorges Reservoir area.In August 2021,the plants and soil at the water level of 150-175 m and above 175 m in the water level fluctuating zone of the Daning River were investigated and collected,focusing on the dominant species and diversity of plants at different water levels,as well as the distribution of soil organic carbon(SOC),total nitrogen(TN)and total phosphorus(TP),and the relationship between plant biomass and diversity and water level and soil nutrients.Results show that:(1)A total of 32 plant species from 30 genera and 17 families were identified during the investigation,primarily consisting of perennial herbs and annual herbs.The dominant species varied at different water level elevations,with the absolute dominance of Ambrosia artemisifolia,Setaria viridis and Cynodon dactylon at water levels above 175 m,175 m and 150-170 m,respectively.Plant diversity increased with the increase of water level.The richness index of plant community first increased,then decreased and increased again with the rise of elevation,and the Shannon-Winner,Simpson and Pielou indices were in an overall upward trend,with all the highest indices occurring at the elevation above 175 m.(2)The content of soil SOC and TP increased with the increase of water level,and both reached the maximum value at the water level of 175 m.The content of TN increased first and then decreased,reaching the maximum value at the water level of 170 m.The content of SOC,TN and TP decreased with the increase of soil depth.(3)Plant biomass was negatively correlated with water level,SOC and TP contents,while positively correlated with TN content.The diversity indices of plant community were positively correlated with

关 键 词：植物多样性 有机碳 总磷 总氮 分布特征 大宁河 

分 类 号：X522[环境科学与工程—环境工程]