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Water quality and habitat drive phytoplankton taxonomic and functional group patterns in the Yangtze River

Ecological Processes 2024年第1期13卷 144-158页

作者： wenqi gao Fangyuan Xiong Ying Lu Wei Xin Haihua Wang Gangpeng Feng Chiping Kong Lei Fang Xiaoping gao Yushun Chen State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences University of Chinese Academy of Sciences Jiangxi Institute for Fisheries Sciences Poyang Lake Fisheries Research Centre of Jiangxi Province East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Jiujiang Institute of Agricultural Sciences

Background Although phytoplankton are important primary producers in food webs, they are relatively less studied in large rivers compared to other types of systems. To fill this research gap, we studied phytoplankton taxonomic and functional composition and their relationships with water quality, habitat, climate, and land use across 30 river sections in the middle and lower reaches of the Yangtze River during 2017–*** Major observed phytoplankton groups were cyanobacteria, bacillariophyta, and chlorophyta. Phytoplankton total abundance, total biomass, and species richness significantly decreased in the dry season compared to the wet season, with the species and functional composition differing significantly between seasons. Phytoplankton species differences between seasons were mainly contributed by Oscillatoria sp., Pseudanabaena sp., and Melosira granulata. The dfferences in phytoplankton functional groups between seasons were mainly contributed by P（including Closterium sp., Melosira sp.）, Lo（including Merismopedia sp., Peridinium sp., Ceratium sp., and Gymnodinium sp.）, and J（including Pediastrum sp., Tetraedron sp., Crucigenia sp., Scenedesmus sp., and Coelastrum sp.）. The variance partitioning showed that water quality（NO3-N, total suspended solids, turbidity） and habitat（water flow, river bank and river channel conditions） were critical factors in shaping phytoplankton patterns, followed by climate and land *** Results indicated that there was significant seasonal variation of phytoplankton in the Yangtze River, with water quality and habitat primarily driving phytoplankton patterns. Our study contributes to the understanding of natural and anthropogenic factors that drive seasonal successional processes of phytoplankton in the Yangtze River. These findings have important implications for environmental management as well as towards the ecological restoration of large rivers.

关键词： Yangtze River Phytoplankton Functional group Water quality Physical habitat

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可降解微塑料对磺胺嘧啶的吸附行为研究

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环境科学与技术 2024年第2期47卷 17-26页

作者：贺艳王晶赵曼邢越越谯思高雯琪西安科技大学地质与环境学院陕西西安710054

微塑料作为载体可吸附水中抗生素,对其环境行为和毒性效应产生影响,但目前研究主要集中于不可降解微塑料,不同类型可降解微塑料对抗生素吸附行为的研究较少。文章选取目前广泛使用的聚乳酸(PLA)和聚己二酸对苯二甲酸丁二醇酯(PBAT)为可... 详细信息

微塑料作为载体可吸附水中抗生素,对其环境行为和毒性效应产生影响,但目前研究主要集中于不可降解微塑料,不同类型可降解微塑料对抗生素吸附行为的研究较少。文章选取目前广泛使用的聚乳酸(PLA)和聚己二酸对苯二甲酸丁二醇酯(PBAT)为可降解微塑料的代表,以磺胺嘧啶为目标抗生素,系统研究其在不同微塑料表面的吸附特性及作用机理。结果表明,PLA和PBAT对磺胺嘧啶的吸附在24 h达到平衡,其平衡吸附量分别为0.746 mg/g和0.716 mg/g,吸附动力学符合准二级动力学模型,表明吸附过程受多种因素影响,其中液膜扩散为主要限速步骤。Freundlich模型对等温吸附过程拟合效果较好,表明2种微塑料对磺胺嘧啶的吸附过程均为非均相多层吸附,且D-R模型进一步表明以物理吸附为主。不同pH值对2种微塑料吸附磺胺嘧啶的影响趋势一致,在pH 4~9范围内,吸附量均随着p H值的增大而降低。2种微塑料的分子结构、比表面积和官能团对其吸附能力及机理影响较大,PLA主要通过范德华力和氢键吸附磺胺嘧啶,而PBAT则通过范德华力、氢键和π-π相互作用与磺胺嘧啶结合。该研究结果有助于深入理解水环境中可降解微塑料与共存抗生素间的相互作用,揭示可降解微塑料作为抗生素载体的能力,为更好地评估这2种污染物的环境风险提供理论基础。

关键词：可降解微塑料磺胺嘧啶吸附机理

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Development of a phytoplankton-based index of biotic integrity for ecological health assessment in the Yangtze River

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Ecological Processes 2023年第1期12卷 573-587页

作者： wenqi gao Fangyuan Xiong Ying Lu Xiao Qu Wei Xin Yushun Chen State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072HubeiChina University of Chinese Academy of Sciences Beijing 100049China

Background The application of index of biotic integrity(IBI)to evaluate river health can be an essential method for river ecosystem ***,these types of methods were developed in small,low-order streams,and are therefore,infrequently applied to large *** that end,phytoplankton communities and environmental variables were monitored in 30 sampling segments of the middle and lower reaches of the Yangtze River,China during the wet(July-August)and dry(November-December)seasons in *** developed a phytoplankton-based index of biotic integrity(P-IBI)and used the index to assess the ecological health of the Yangtze *** among P-IBI,its component metrics,and environmental factors were analyzed across different *** Results obtained from the P-IBI indicated that the phytoplankton-based ecological health of the Yangtze River was rated as“good”during both seasons,with an overall better condition in the dry *** the wet season,there were scattered river segments with P-IBI ratings of“fair”or *** quality and land use appeared to shape the patterns of *** the wet season,P-IBI negatively correlated with total phosphorus,nitrate,total suspended solids,turbidity,conductivity,and dissolved *** the dry season,P-IBI positively correlated with total nitrogen,ammonium,and nitrite,and negatively correlated with water *** The ecological health of the Yangtze River as reflected by the P-IBI exhibited spatial and temporal variability,with the effect of water quality being greater than that of local land *** study indicated the importance of considering seasonal effects in detecting large river ecological *** findings enhanced our understanding of the ecological health and characterized potential benchmarks for management of the Yangtze *** findings also may be applicable to other large rivers elsewhere.

关键词： Large river Index of biotic integrity(IBI) Ecological health assessment Water quality Land use

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The evolution and enlightenment of water resourcesaccounting from accounts to balance sheet

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Research in Cold and Arid Regions 2016年第2期8卷 156-162页

作者： FuHui Jian XiaoYu Song LiLi Li wenqi gao Key Laboratory of Eco-hydrology and River Basin Science Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of SciencesGansu 730000China Gansu's Economic Research Institute Gansu 730000China University of Chinese Academy of Sciences Beijing 100049China Lanzhou University of Finance and Economics Gansu 730020China

The Third Plenary Session of the 18 th Central Committee of the Communist Party of China has proposed an important national strategic decision: to explore and establish the balance sheet of natural resources, to implement leaders’ of-office auditing system about natural resources assets. Water is one of the most essential nature resources of human beings; water resources accounting, as an important water resources management tool, is an essential part of compiling the natural resources balance sheet. In this paper, we provide a summary of the historic evolution of water resources accounting and analyze its application in some typical countries. Although water resources accounting and water resources balance sheet reflect different implications and focus, both require water resources accounts as the basis in system establishment.

关键词： water resources water accounts water accounting water balance sheet

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Optical Realization of Comparison of Binary Patterns

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Chinese Journal of Lasers 1995年第4期B4卷 343-346页

作者： HE Yongrong HAN Liangkai ZHOU Jin gao wenqi(Physics deparment,Nanjing University,Nanjing 210093, China) Nanjing Univ Nanjing China

ＯｐｔｉｃａｌＲｅａｌｉｚａｔｉｏｎｏｆＣｏｍｐａｒｉｓｏｎｏｆＢｉｎａｒｙＰａｔｔｅｒｎｓ￥ＨＥＹｏｎｇｒｏｎｇ；ＨＡＮＬｉａｎｇｋａｉ；ＺＨＯＵＪｉｎ；ＧＡＯＷｅｎｑｉ（Ｐｈｙｓｉｃｓｄｅｐａｒｍｅｎｔ，Ｎａｎｊ... 详细信息

ＯｐｔｉｃａｌＲｅａｌｉｚａｔｉｏｎｏｆＣｏｍｐａｒｉｓｏｎｏｆＢｉｎａｒｙＰａｔｔｅｒｎｓ￥ＨＥＹｏｎｇｒｏｎｇ；ＨＡＮＬｉａｎｇｋａｉ；ＺＨＯＵＪｉｎ；ＧＡＯＷｅｎｑｉ（Ｐｈｙｓｉｃｓｄｅｐａｒｍｅｎｔ，ＮａｎｊｉｎｇＵｎｉｖｅｒｓｉｔｙ，Ｎａｎ...

关键词： logical operation polarization optical comparison

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Numerical modeling of global seismic phases and its application in seismic phase identification

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Earthquake Science 2019年第2期32卷 72-79页

作者： Chanjun Jiang Youxue Wang Bin Xiong Qianci Ren Jinfeng Hu wenqi gao Yi Tian Xi Zhuo School of Earth Science Guilin University of TechnologyGuilin541006China Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration Guilin541006China

Earthquake data include informative seismic phases that require identification for imaging the Earth's structural *** order to identify the phases,we created a numerical method to calculate the traveltimes and raypaths by a shooting technique based upon the IASP91 Earth model,and it can calculate the traveltimes and raypaths for not only the seismic phases in the traditional traveltime tables such as IASP91,AK135,but also some phases such as pPcP,pPKIKP,and *** is not necessary for this method to mesh the Earth model,and the results from the numerical modeling and its application show that the absolute differences between the calculated and theoretical traveltimes from the ISAP91 tables are less than 0.1 ***,it is simple in manipulation and fast in computation,and can provide a reliable theoretical prediction for the identification of a seismic phase within the acquired earthquake data.

关键词： IASP91 Earth model numerical modeling shooting method,seismic phase prediction

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A review of water resources utilization and protection in Southwest China

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Research in Cold and Arid Regions 2015年第6期7卷 736-746页

作者： CuiFang Wu Steve Déry WanCai Wu XueBin Liu JinHui Xiong wenqi gao School of Agriculture & Forestry Economics and Management Lanzhou University of Finance and Economics Department of Geography Université Laval Center of Teaching Guidance Gansu Radio & TV University School of Economics Lanzhou University of Finance and Economics

Yunnan and Guizhou are two provinces in Southwest China where in recent years drought disasters have occurred due to natural and human factors. This paper reviewed literature and summarized the related achievements of water resources utilization and protection in Yunnan and Guizhou provinces. rivers, and karst ground water in the two provinces, and also This included characters and utilization of precipitation, the various explanations of drought （climate and human factors） and strategies for coping with droughts. Our concluding remarks highlight three lines of future studies： inequalities and equitable use of water distribution, better evaluation systems, and raising awareness through conservation practices.

关键词： water resources water utilization and protection drought karst water China

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基于锌空电池探究能斯特方程影响因素及固态锌空电池的应用

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大学化学 2024年第5期39卷 98-107页

作者：高文琪范晓艳王飞翔傅镯君张璟胡恩来宫培军浙江师范大学化学与材料科学学院浙江金华321019

针对无机化学中能斯特方程的教学难点,本实验引入紧跟科学前沿的锌空电池为教学模型,通过改变电极氧化型和还原型浓度来探究能斯特方程影响因素,加深学生对于电化学过程的理解。同时将柔性电子技术引入实验课堂,以安全环保的卡拉胶作为... 详细信息

针对无机化学中能斯特方程的教学难点,本实验引入紧跟科学前沿的锌空电池为教学模型,通过改变电极氧化型和还原型浓度来探究能斯特方程影响因素,加深学生对于电化学过程的理解。同时将柔性电子技术引入实验课堂,以安全环保的卡拉胶作为固态电解质,引导学生学习、搭建固态锌空电池,并对其进行电池电压与弯曲角度的性能测试。此外,培养学生创造力,自主设计搭建多形态固态锌空电池,并对用电器进行供电。本实验紧密结合基础电化学知识,密切联系科研前端技术,使学生在加深对能斯特方程理解的同时,能够认识和制作柔性电子器件,激发学生对电化学课程的学习兴趣,且教学成本低、效果好。

关键词：能斯特方程锌空电池柔性电子固态电解质

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佳多频振式杀虫灯在上海地区蔬菜上控害应用的效益

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植物保护 2006年第3期32卷 102-103页

作者：高文琦上海市蔬菜科学技术推广站上海201103

长期以来在害虫防害手段上单纯地依赖化学农药,往往得不到很好的防治效果,相反却会引起越来越多的负面效应.

关键词：佳多频振式杀虫灯上海地区效益应用蔬菜化学农药防治效果负面效应防害害虫

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考虑承包商过度自信和时间价值的激励契约研究

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管理工程学报 2023年第2期37卷 108-118页

作者：高尚高文棋周晶雷丽彩南京大学工程管理学院江苏南京210093 湘潭大学商学院湖南湘潭411105

鉴于传统委托代理模型的分析框架未能充分反映承包商在工程项目中实际活动的现实,本文引入拓展的委托代理模型,同时考虑到承包商在施工过程中会存在过度自信倾向和时间价值,分析非对称信息情形下业主和承包商的利益博弈,探究承包商过度... 详细信息

鉴于传统委托代理模型的分析框架未能充分反映承包商在工程项目中实际活动的现实,本文引入拓展的委托代理模型,同时考虑到承包商在施工过程中会存在过度自信倾向和时间价值,分析非对称信息情形下业主和承包商的利益博弈,探究承包商过度自信和时间价值对双方最优决策的影响。其中,承包商过度自信表现为低估项目风险,时间价值表征预期机会收益。本文进一步分析契约并与建立的两个基准契约模型比较,研究业主与承包商之间的最优激励契约设计问题。仿真结果表明考虑承包商过度自信和时间价值的激励契约起着降低业主期望总成本的作用,对于项目业主而言,识别承包商的类型并选择合适的风险分担系数可以有效激励承包商努力工作,实现双方利益目标一致。研究结果对业主设计最优激励契约具有一定的借鉴意义。

关键词：激励契约过度自信时间价值委托代理理论

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