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Composition regulates dissolved organic matter adsorption onto iron (oxy)hydroxides and its competition with phosphate: Implications for organic carbon and phosphorus immobilization in lakes

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Journal of Environmental Sciences 2024年第10期144卷 159-171页

作者： ShuaiLong Wen JingJing Liu YueHan Lu JiaRu Dai XiuLin Huang ShiLin An erik jeppesen ZhengWen Liu YingXun Du State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Molecular Eco-Geochemistry(MEG)Laboratory Department of Geological SciencesThe University of Alabama2017th AveTuscaloosaAL 35485USA School of Environmental Science and Engineering Nanjing Tech UniversityNanjing 210008China School of Environmental and Chemical Engineering Chongqing Three Gorges UniversityChongqing 404020China Department of Ecoscience Aarhus UniversitySilkeborg 8600Denmark Sino-Danish Centre for Education and Research University of Chinese Academy of SciencesBeijing 101408China Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and ImplementationMiddle East Technical UniversityAnkara 06800Turkey

Dissolved organicmatter(DOM)is a heterogeneous pool of compounds and exhibits diverse adsorption characteristics with or without phosphorous(P)*** impacts of these factors on the burial and mobilization of organic carbon and P in aquatic ecosystems remain *** this study,an algae-derived DOM(ADOM)and a commercially available humic acid(HA)with distinct compositions were assessed for their adsorption behaviors onto iron(oxy)hydroxides(FeOx),both in the absence and presence of *** contained less aromatics but more protein-like and highly unsaturated structures with oxygen compounds(HUSO)than *** adsorption capacity of FeOx was significantly greater for ADOM than for ***-like and HUSO compounds in ADOM and humic-like compounds and macromolecular aromatics in HA were preferentially adsorbed by ***,ADOM demonstrated a stronger inhibitory effect on phosphate adsorption than *** observation suggests that the substantial release of autochthonous ADOM by algae could elevate internal P loading and pose challenges for the restoration of restore eutrophic *** presence of phosphate suppressed the adsorption of protein-like compounds in ADOM onto FeOx,resulting in an increase in the relative abundance of protein-like compounds and a decrease in the relative abundance of humic-like compounds in post-adsorption *** contrast,phosphate exhibited no discernible impact on the compositional fractionation of ***,our results show the source-composition characters of DOM influence the immobilization of both DOM and P in aquatic ecosystems through adsorption *** preferential adsorption of proteinaceous compounds within ADOM and aromatics within HA highlights the potential for the attachment with FeOx to diminish the original source-specific signatures of DOM,thereby contributing to the shared DOM characteristics observed across diverse aquatic environments.

关键词： Algal dissolved organic matter Humic acid Adsorption Phosphate Fractionation FT-ICR MS

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Importance of periphytic biofilms for carbon cycling in paddy fields:A review

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Pedosphere 2024年第1期34卷 36-43页

作者： Lei ZHOU Yonghong WU Junzhuo LIU Pengfei SUN Ying XU Jan DOLFING Robert GMSPENCER erik jeppesen State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Zigui Three Gorges Reservoir Ecosystem Observation and Research Station of Ministry of Water Resources of the People's Republic of ChinaYichang 443605China College of Nanjing University of Chinese Academy of SciencesNanjing 211135China Faculty of Energy and Environment Northumbria UniversityNewcastle upon Tyne NE18QHUK Department of Earth Ocean and Atmospheric ScienceFlorida State UniversityTallahassee FL 32306USA Department of Ecoscience&Centre for Water Technology(WATEC) Aarhus UniversityAarhus DK-8000Denmark Sino-Danish Centre for Education and Research Beijing 100049China Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and Implementation(EKOSAM)Middle East Technical UniversityAnkara 06800Turkiye Institute of Marine Sciences Middle East Technical UniversityMersin 33731Turkiye

Paddy fields play an important role in global carbon(C) cycling and are an important source of methane(CH_(4)) emissions. Insights into the processes influencing the dynamics of soil organic C(SOC) in paddy fields are essential for maintaining global soil C stocks and mitigating climate change. Periphytic biofilms composed of microalgae, bacteria, and other microorganisms are ubiquitous in paddy fields, where they directly mediate the transfer of elements at the soil-water interface. However, their contributions to C turnover and exchange have been largely neglected. Periphytic biofilms affect and participate in soil C dynamics by altering both abiotic(e.g., pH and redox potential) and biotic conditions(e.g., microbial community composition and metabolism). This review summarizes the contributions of periphytic biofilms to soil C cycling processes, including carbon dioxide fixation, SOC mineralization, and CH_(4) emissions. Future research should be focused on: i) the mechanisms underlying periphytic biofilm-induced C fixation and turnover and ii) quantifying the contributions of periphytic biofilms to soil C uptake, stabilization, and sequestration in paddy fields.

关键词： carbon fixation carbon mineralization carbon sequestration methane emission microbial aggregates soil organic carbon

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Biodegradable dissolved organic carbon shapes bacterial community structures and co-occurrence patterns in large eutrophic Lake Taihu

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Journal of Environmental Sciences 2021年第9期33卷 205-217页

作者： Lei Zhou Yongqiang Zhou Xiangming Tang Yunlin Zhang erik jeppesen Taihu Laboratory for Lake Ecosystem Research State Key Laboratory of Lake Science and EnvironmentNanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Department of Bioscience Aarhus UniversitySilkeborg 8600Denmark Sino-Danish Centre for Education and Research Beijing 100049China Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and ImplementationMiddle East Technical UniversityAnkara 06800Turkey Institute of Marine Sciences Middle East Technical UniversityMersinTurkey

Interactions between dissolved organic matter(DOM)and bacteria are central in the biogeochemical cycles of aquatic ecosystems;however,the relative importance of biodegradable dissolved organic carbon(BDOC)compared with other environmental variables in structuring the bacterial communities needs further ***,we investigated bacterial communities,chromophoric DOM(CDOM)characteristics and physico-chemical parameters as well as examined BDOC via bioassay incubations in large eutrophic Lake Taihu,China,to explore the importance of BDOC for shaping bacterial community structures and co-occurrence *** found that the proportion of BDOC(%BDOC)correlated significantly and positively with the DOC concentration and the index of the contribution of recent produced autochthonous CDOM(BIX).%BDOC,further correlated positively with the relative abundance of the tryptophan-like component and negatively with CDOM aromaticity,indicating that autochthonous production of protein-like CDOM was an important source of *** richness of the bacterial communities correlated negatively with%BDOC,indicating an enhanced number of species in the refractory DOC environments.%BDOC was identified as a significant stronger factor than DOC in shaping bacterial community composition and the co-occurrence network,suggesting that substrate biodegradability is more significant than DOC quantity determining the bacterial communities in a eutrophic *** factors explained a larger proportion of the variation in the conditionally rare and abundant subcommunity than for the abundant and the rare bacterial *** findings emphasize the importance of considering bacteria with different abundance patterns and DOC biodegradability when studying the interactions between DOM and bacteria in eutrophic lakes.

关键词： Biodegradable dissolved organic carbon Bacterial community Co-occurrence networks Chromophoric dissolved organic matter Habitat niche breadth

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Response of community composition and biomass of submerged macrophytes to variation in underwater light, wind and trophic status in a large eutrophic shallow lake

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Journal of Environmental Sciences 2021年第5期33卷 298-310页

作者： Baili Dong Yongqiang Zhou erik jeppesen Kun Shi Boqiang Qin Taihu Laboratory for Lake Ecosystem Research State Key Laboratory of Lake Science and EnvironmentNanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Department of Bioscience Aarhus UniversityVejlsovej 258600 SilkeborgDenmark Sino-Danish Centre for Education and Research(SDC) University of Chinese Academy of SciencesBeijing 100049China Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and ImplementationMiddle East Technical UniversityAnkaraTurkey

Light climate is of key importance for the growth, community composition of submerged macrophytes in lakes and, they, in turn, are affected by lake depth and the degree of eutrophication. To test the relationships between submerged macrophyte presence and the ratio of Secchi disk depth(SDD) to water depth, i.e. SDD/depth, nutrients and wind, we conducted an extensive sampling campaign in a macrophyte-dominated area of the eastern region( n = 36) in 2016 in Lake Taihu, China, and combined the data gathered with results from extensive physico-chemical monitoring data from the entire lake. We confirmed that SDD/Depth is the primary factor controlling the community composition of macrophytes and showed that plant abundance increased with increasing SDD/Depth ratio( p 0.4 ensured growth of submerged macrophytes. Total phosphorus and total nitrogen also influenced the growth and community composition of macrophytes( p 0.05). The key to restore the macrophyte beds in the lake is to reduce the nutrient loading. A decrease of the water level may contribute as well in the shallow bays but will not bring plants back in the main part of the lake. As the tolerance of shade and nutrients varied among the species studied, this should be taken into account in the restoration of lakes by addition of plants.

关键词： Underwater light climate Water depth Community composition Macrophyte Eutrophication

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Metagenomic analysis to determine the characteristics of antibiotic resistance genes in typical antibiotic-contaminated sediments

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Journal of Environmental Sciences 2023年第6期128卷 12-25页

作者： Han Yang Mu Xu Liqing Wang Xianyun Wang erik jeppesen Wei Zhang Engineering Research Center of Environmental DNA and Ecological Water Health Assessment Centre for Research on Environmental Ecology and Fish Nutrient of the Ministry of AgricultureShanghai Ocean UniversityShanghai 201306China Shanghai National Engineering Research Center for Urban Water Resources Co. Ltd.Shanghai 200082China Department of Ecoscience Aarhus UniversityC.F.MФlers Allé38000 Aarhus CDenmark Sino-Danish Centre for Education and Research(SDC) University of Chinese Academy of SciencesBeijing 100190China Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and ImplementationMiddle East Technical UniversityAnkara 06800Turkey Institute of Marine Sciences Middle East Technical University33731 MersinTurkey

Comprehensive studies of the effects of various physical and chemical variables(including heavymetals),antibiotics,and microorganisms in the environment on antibiotic resistance genes are *** collected sediment samples from the Shatian Lake aquaculture area and surrounding lakes and rivers located in Shanghai,*** spatial distribution of sediment ARGs was assessed by metagenomic analysis that revealed 26 ARG types(510 subtypes),dominated by Multidrug,β-lactam,Aminoglycoside,Glycopeptides,Fluoroquinolone,and *** discriminant analysis indicated that antibiotics(SAs and MLs)in the aqueous environment and sediment along with water TN and TP were the key variables affecting the abundance distribution of total ***,the main environmental drivers and key influences differed among the different *** total ARGs,the environmental subtypes affecting their structural composition and distribution characteristics were mainly antibiotic *** analysis showed a significant correlation between ARGs and microbial communities in the sediment in the survey *** analysis revealed that most of the target ARGs were significantly and positively correlated with microorganisms,and a small number of ARGs(e.g.,rpoB,mdtC,and efpA)were highly significantly and positively correlated with microorganisms(e.g.,Knoellia,Tetrasphaera,and Gem-matirosa).Potential hosts for the major ARGs included Actinobacteria,Proteobacteria,and *** study provides new insight and a comprehensive assessment of the distribution and abundance of ARGs and the drivers of ARG occurrence and transmission.

关键词： Metagenomic analysis Antibiotic resistance genes Environmental drivers Sediments Shatian Lake

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Human impact on current environmental state in Chinese lakes

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Journal of Environmental Sciences 2023年第4期126卷 297-307页

作者： Qianhong Wang Yun Li Le Liu Suzhen Cui Xia Liu Feizhou Chen erik jeppesen State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Sino-Danish Centre for Education and Research(SDC) Beijing 100049China Department of Ecoscience Aarhus UniversitySilkeborg 8600Denmark Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and ImplementationMiddle East Technical UniversityAnkaraTurkey Institute of Marine Sciences Middle East Technical UniversityMersinTurkey

Anthropogenic and natural disturbance to inland aquatic ecosystems displays a notable spatial difference, yet data to measure these differences are scarce. This study encompasses 217 lakes distributed over five lake regions of China and elucidates the environmental factors determining the spatial variability of the water quality and trophic status. A significant correlation between human modification index in surrounding terrestrial systems(HMT)and trophic status of lake ecosystems(TSI) was found, and the regression slope in each region was similar except in the Qinghai-Tibet Plateau region. It was further noted that the pattern of environmental factor network(EF network) differed among freshwater and saline lakes. The EF network was complex for freshwater lakes in less human-influenced areas, but intensive man-made influence disrupted most relationships except for those between total nitrogen, total phosphorus, chlorophyll-a, and water turbidity. As for regions including saline lakes, correlations among water salinity and organic forms of carbon and nitrogen were apparent. Our results suggest that HMT and EF network can be useful indicators of the ecological integrity of local lake ecosystems, and integrating spatial information on a large scale provides conservation planners the option for evaluating the potential risk on inland aquatic systems.

关键词： Anthropogenic impact Trophic state Lake Spatial patterns Environmental management

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A trait-based approach to assess climate change sensitivity of freshwater invertebrates across Swedish ecoregions

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Current Zoology 2014年第2期60卷 221-232页

作者： Leonard SANDIN Astrid SCHMIDT-KLOIBER Jens-Christian SVENNING erik jeppesen Nikolai FRIBERG Department of Bioscience and Arctic Centre Aarhus University VejlsФvej 25 DK-8600 Silkeborg Denmark Department of Aquatic Sciences and Assessment Swedish University of Agricultural Sciences P.O. Box 7050 SE-750 07 UppsalaSweden Department Water Atmosphere Environment Institute of Hydrobiology and Aquatic Ecosystem Management University of NaturalResources and Life Sciences Max-Emanuel Strasse 17 1180 Vienna Austria Department of Bioscience Aarhus University Ny Munkegade 114 DK-8000 Aarhus Denmark Sino-Danish Center for Education and Research Beijing China Norwegian Institute for Water Research Gaustadall6en 21 NO-0349 Oslo Norway

Freshwater habitats and organisms are among the most threatened on Earth, and freshwater ecosystems have been subject to large biodiversity losses. We developed a Climate Change Sensitivity （CCS） indicator based on trait information for a selection of stream- and lake-dwelling Ephemeroptera, Plecoptera and Trichoptera taxa. We calculated the CCS scores based on ten species traits identified as sensitive to global climate change. We then assessed climate change sensitivity between the six main ecoregions of Sweden as well as the three Swedish regions based on lilies. This was done using biological data from 1,382 stream and lake sites where we compared large-scale （ecoregional） patterns in climate change sensitivity with potential future exposure of these ecosystems to increased temperatures using ensemble-modelled future changes in air temperature. Current （1961-1990） measured temperature and ensemble-modelled future （2100） temperature showed an increase from the northernmost towards the southern ecoregions, whereas the predicted temperature change increased from south to north. The CCS indicator scores were highest in the two northernmost boreal ecoregions where we also can expect the largest global climate change-induced increase in temperature, indicating an unfortunate congruence of exposure and sensitivity to climate change. These results are of vital importance when planning and implementing management and conservation strategies in freshwater ecosystems, e.g., to mitigate increased temperatures using riparian buffer strips. We conclude that traits information on taxa specialization, e.g., in terms of feeding specialism or taxa having a preference for high altitudes as well as sensitivity to changes in temperature are important when assessing the risk from future global climate change to freshwater ecosystems [Current Zoology 60 （2）： 221-232, 2014].

关键词： Climate change Indicators Traits Freshwater Macroinvertebrates Ecoregions

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The effect of cylindrospermopsin on the bacterioplankton community:a microcosm experiment on water from Dishui Lake,Shanghai,China

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Journal of Oceanology and Limnology 2022年第5期40卷 1829-1839页

作者： Sicheng YIN Ruohan HUANG erik jeppesen Lijing CHEN Liqing WANG Xin FANG Wei ZHANG Engineering Research Center of Environmental DNA and Ecological Water Health Assessment Shanghai Ocean UniversityShanghai 201306China Department of Ecoscience Aarhus UniversitySilkeborg 8600Denmark Sino-Danish Centre for Education and Research(SDC) University of Chinese Academy of SciencesBeijing 100049China Limnology Laboratory and EKOSAM Department of Biological SciencesMiddle East Technical UniversityAnkara 06800Turkey Institute of Marine Sciences Middle East Technical UniversityMersin 33731Turkey School of Business Macao University of Science and TechnologyTaipaMacao 999078China

Eutrophication and climate warming have intensified the global expansion of invasive cyanobacteria such as Cylindrospermopsis *** Chrysosporum ***(CYN)produced by species of the latter two genera may harm phytoplankton,zooplankton,and ***,effects of CYN on the bacterioplankton community have not been *** on high-throughput sequencing,we explored the effect of CYN on the structure and function of the bacterioplankton community by adding pure CYN to in-situ water collected from a brackish coastal shallow lake:Dishui Lake,*** found that most bacterioplankton taxa had a certain tolerance potential to CYN,but that high concentrations of CYN(40μg/L)caused a significant decrease in microbial abundance and functional *** the dominant phyla,Actinobacteria had the strongest tolerance to *** analysis indicated that CYN caused shifts in the community structure of the bacterioplankton,reducing community stability and structural *** CYN concentrations also reduced the correlation between the different bacterioplankton groups,and the abundances of some bacterial taxa associated with the denitrification function and the process of carbon transfer in the microbial food web were *** study provide s new insight into the response of the bacterioplankton communities to harmful algal toxins produced by cyanobacteria.

关键词： cylindrospermopsin bacterioplankton denitrification function carbon cycles Dishui Lake

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Importance and vulnerability of lakes and reservoirs supporting drinking water in China

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Fundamental Research 2023年第2期3卷 265-273页

作者： Yunlin Zhang Jianming Deng Boqiang Qin Guangwei Zhu Yinjun Zhang erik jeppesen Yindong Tong State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China China National Environmental Monitoring Centre 8(B)Dayangfang Beiyuan RoadChaoyang DistrictBeijing 100012China Department of Ecoscience and Arctic Research Centre Aarhus University8600SilkeborgDenmark Sino-Danish Centre for Education and Research Chinese Academy of SciencesBeijing 100101China Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and ImplementationMiddle East Technical UniversityAnkara 06800Turkey Institute of Marine Sciences Middle East Technical UniversityErdemli-Mersin 33731Turkey School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China

Drinking water is closely related to human health,disease and mortality,and contaminated drinking water causes 485,000 deaths from diarrhea each year *** has been facing increasingly severe water scarcity due to both water shortages and poor water *** safe and clean drinking water is a great challenge and top priority,especially for China with 1.4 billion *** China,more than 4000 centralized drinking water sources including rivers,lakes and reservoirs,and groundwater have been established to serve urban ***,there is little knowledge on the percentage,serving population and water quality of three centralized drinking water source *** collected nationwide centralized drinking water sources data and serving population data covering 395 prefecture-level and county-level cities and water quality data in the two most populous provinces(Guangdong and Shandong)to examine their contribution and ***,the drinking water source types can be classified into three clear regions exhibiting apparent differences in the respective contributions of rivers,lakes and reservoirs,and *** further found that overall,lakes and reservoirs account for 40.6%of the centralized drinking water sources ***(30.8%)and groundwater(28.6%)in *** and reservoirs are particularly important in the densely populated eastern region,where they are used as drinking water sources by 51.0%of the population(318 million).Moreover,the contribution to the drinking water supply from lakes and reservoirs is increasing due to their better water quality and many cross-regional water transfer *** results will be useful for the government to improve and optimize the establishment of centralized drinking water sources,which provide safe and clean drinking water in China to safeguard people's lives and health and realize sustainable development goals.

关键词： Centralized drinking water source Drinking water safety Lakes and reservoirs Population Water quality

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枝角类亚化石揭示的湖北太白湖过去百余年环境演变

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湖泊科学 2022年第4期34卷 1372-1383页

作者：林涌权董旭辉廖粤军李燕羊向东 jeppesen erik 广州大学地理科学与遥感学院广州510006 广州大学气候与环境变化研究中心广州510006 广东省韶关市田家炳中学韶关512026 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室南京210008 丹麦奥尔胡斯大学生物科学系斯尔克堡8600

近百年来长江中下游地区的浅水湖泊经历了气候变化及日益增强的人类扰动,造成了普遍的湖泊富营养化、水动力条件和水生生态系统的状态转变,水体的生态服务功能明显退化.枝角类作为一种重要的水生生物,敏感地响应于湖泊及其流域的环境变... 详细信息

近百年来长江中下游地区的浅水湖泊经历了气候变化及日益增强的人类扰动,造成了普遍的湖泊富营养化、水动力条件和水生生态系统的状态转变,水体的生态服务功能明显退化.枝角类作为一种重要的水生生物,敏感地响应于湖泊及其流域的环境变化,但目前对亚热带湖泊中的枝角类亚化石的环境指示意义,与其它古生态指标如硅藻、摇蚊等对环境变化的响应差异尚未明确.因此,本文以浅水湖泊太白湖为研究对象,结合流域历史资料和监测数据,基于沉积岩芯中枝角类群落过去百年来的期演化序列,重建了近百年来太白湖的历史环境演变过程及机制.对比硅藻及摇蚊的群落演化特征,探讨了多门类古生态指标对环境变化的响应差异.本文重点讨论了枝角类对湖泊鱼类产量指示意义及利用枝角类亚化石来重建历史环境的应用前景及不足.

关键词：太白湖枝角类环境变化古生态状态转变

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