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Probabilistic ecological risk assessment of cadmium in the Bohai Sea using native saltwater species

Acta Oceanologica Sinica 2014年第12期33卷 212-221页

作者： MU Jingli WANG Juying WANG Ying CONG Yi ZHANG Zhifeng Key Laboratory for ecological Environment in Coastal Areas State Oceanic Administration National Marine environmental monitoring center

Predicted no-effect concentration （PNEC） is often used in ecological risk assessment to determine low-risk concentrations for chemicals. In the present study, the chronic data from native saltwater species were used to calculated PNEC values using four methods： log-normal distribution （ETX 2.0）, log-triangle distribution （US EPA＇s water quality criteria procedure）, burr III distribution （BurrliOZ） and traditional assessment fac-tor （AF）. The PNECs that were calculated using four methods ranged from 0.08 μg/L to 1.8 μg/L. Three of the SSD-derived PNECs range from 0.94 to 1.8 μg/L, about a factor of two apart. To demonstrate the use of SSD-based PNEC values and comprehensively estimate the regional ecological risk for cadmium in surface water of the Bohai Sea, in the Liaodong Bay, Bohai Bay, and Laizhou Bay, China, the dissolved cadmium con-centrations were measured and obtained 753 valid data covering 190 stations from July 2006 to November 2007. Based on three ecological risk assessment approaches, namely hazard quotient （HQ）, probabilistic risk quotient and joint probability curve （JPC）, the potential ecological risk of cadmium in surface water of the Liaodong Bay, Bohai Bay, and Laizahou Bay were estimated. Overall, the ecological risk of cadmium to aquatic ecosystem in the whole Bohai Sea was at acceptable ecological risk level, the order of ecological risk was Liaodong Bay〉Bohai Bay〉Laizhou Bay. However, more concerns should be paid to aquatic ecological risk in the Liaodong Bay which is the home of many steel, metallurgy and petrochemical industrial in China.

关键词： Bohai Sea cadmium PNEC SSD probabilistic ecological risk assessment

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Effects of shellfish culture on the community and mortality of zooplankton in a subtropical Bay

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Journal of Oceanology and Limnology 2023年第2期41卷 458-468页

作者： Bijian PANG Hongjun LI Mingmin LI Xin LUO Ying CHEN Tianshen LI Wenlu LAN Beibu Gulf Marine ecological Environment Field Observation and Research Station of Guangxi Marine Environmental Monitoring Center of GuangxiBeihai 536000China National Marine environmental monitoring center Dalian 116023China

Spatial and temporal distribution of abundance,community structure and succession,and mortality of zooplankton were examined in a subtropical bay—the Qinzhou Bay,Guangxi,South China,to evaluate the impact of oyster culture on *** on zooplankton abundance,phytoplankton biomass,and environmental parameters were collected in 12 routine samplings at four sites in the Qinzhou Bay in *** show that the hydrological environment in the estuary affected the temporal variation of zooplankton of the Qinzhou ***,the oyster culture affected the spatial distributions of *** abundance of zooplankton outside the oyster farm was higher than that inside,whereas the mortality outside the oyster farm,on the contrary,was lower than that *** culture in the Qinzhou Bay had built a significant impact on the abundance and community composition of zooplankton,and the food shortage caused by the ingestion of oyster might exacerbate the mortality of zooplankton in the Qinzhou *** addition,the large-scale oyster culture increased the spatial heterogeneity of the community structure of zooplankton inside and outside the oyster *** of this study provide a reference for future policy-making in aquaculture management.

关键词： zooplankton community structure mortality oyster culture Qinzhou Bay

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Terrestrial input and nutrient change reflected by sediment records of the Changjiang River Estuary in recent 80 years

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Acta Oceanologica Sinica 2015年第2期34卷 27-35页

作者： LI Junlong ZHENG Binghui HU Xupeng WANG Yiming DING Ye LIU Fang College of Water Sciences Beijing Normal University State Key Laboratory of environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences State environmental Protection Key Laboratory of Quality Control in environmental monitoring China National Environmental Monitoring Center Zhoushan Marine ecological environmental monitoring Station

A variety of environmental problems have been observed in the Changjiang River Estuary and adjacent coastal area, including eutrophication, harmful algal blooms（HABs）, and hypoxia in recent decades. Application of sedimentary biogenic element indicators on the study of paleoenvironment can reconstruct environmental evolution history of waters. Two 210Pb-dated cores were collected from the Changjiang River Estuary（S3） and adjacent coastal area（Z13）, and total organic carbon（TOC）, total nitrogen（TN）, biogenic silicon（BSi）, total phosphorus（TP） and phosphorus（P） species were analyzed. Three stages of environmental changes are deduced by the nutrient sedimentary records. First, nutrient concentration increased rapidly since the 1950 s, which attributed to agriculture development and overused chemical fertilizers. Second, nutrient concentration kept high and primary production began to promote during the 1960 s to 1980 s, while diatom abundance and proportion began to decline since the 1970 s, accompanied by reduced 23 Si O- concentration and flux from the river. Third, due to several dams and bridges constructed, river runoff and coastal hydrodynamic conditions reduced to a certain extent since the 1990 s, which aggravated the unbalance in nutrient structure. Multi-nutrient proxies in sediment can reflect the natural environm-ental changes as well as influence of human activities.

关键词： biogenic elements phosphorus species sediment cores Changjiang River Estuary

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Exploration of the formation mechanism and source attribution of ambient ozone in Chongqing with an observation-based model

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Science China Earth Sciences 2018年第1期61卷 23-32页

作者： SU Rong LU KeDing YU JiaYan TAN ZhaoFeng JIANG MeiQing LI Jing XIE ShaoDong WU YuSheng ZENG LiMin ZHAI ChongZhi ZHANG YuanHang State Key Joint Laboratory of environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing 100871 China ecological and environmental monitoring center ofChongqing Chongqing 401147 China

An intensive field campaign was conducted in Chongqing during the summer of 2015 to explore the formation mechanisms of ozone pollution. The sources of ozone, the local production rates, and the controlling factors, as well as key species of volatile organic compounds(VOCs), were quantified by integrating a local ozone budget analysis, calculations of the relative incremental reactivity, and an empirical kinetic model approach. It was found that the potential for rapid local ozone formation exists in Chongqing. During ozone pollution episodes, the ozone production rates were found to be high at the upwind station Nan Quan, the urban station Chao Zhan, and the downwind station Jin-Yun Shan. The average local ozone production rate was 30×10^(-9) V/V h^(-1) and the daily integration of the produced ozone was greater than 180×10^(-9) V/V. High ozone concentrations were associated with urban and downwind air masses. At most sites, the local ozone production was VOC-limited and the key species were aromatics and alkene, which originated mainly from vehicles and solvent usage. In addition, the air masses at the northwestern rural sites were NO_x-limited and the local ozone production rates were significantly higher during the pollution episodes due to the increased NOx concentrations. In summary, the ozone abatement strategies of Chongqing should be focused on the mitigation of VOCs. Nevertheless, a reduction in NO_x is also beneficial for reducing the regional ozone peak values in Chongqing and the surrounding areas.

关键词： Ozone Chongqing Photochemistry NO_x VOCs Sensitivity analysis Relative incremental reactivity EKMA

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Effects of climate change and land use/cover change on the volume of the qinghai Lake in China

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Journal of Arid Land 2022年第3期14卷 245-261页

作者： WANG Hongwei QI Yuan LIAN Xihong ZHANG Jinlong YANG Rui ZHANG Meiting Key Laboratory of Remote Sensing of Gansu Province Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China School of Resource and environmental Sciences Wuhan UniversityWuhan 430079China qinghai ecological and environmental monitoring center Xining 810007China

qinghai Lake is the largest saline lake in *** change in the lake volume is an indicator of the variation in water resources and their response to climate change on the qinghai-Tibetan Plateau(QTP)in *** present study quantitatively evaluated the effects of climate change and land use/cover change(LUCC)on the lake volume of the qinghai Lake in China from 1958 to 2018,which is crucial for water resources management in the qinghai Lake *** explore the effects of climate change and LUCC on the qinghai Lake volume,we analyzed the lake level observation data and multi-period land use/land cover(LULC)data by using an improved lake volume estimation method and Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)*** results showed that the lake level decreased at the rate of 0.08 m/a from 1958 to 2004 and increased at the rate of 0.16 m/a from 2004 to *** lake volume decreased by 105.40×10^(8) m^(3) from 1958 to 2004,with the rate of 2.24×10^(8) m^(3)/a,whereas it increased by 74.02×10^(8) m^(3) from 2004 to 2018,with the rate of 4.66×10^(8) m^(3)/***,the climate of the qinghai Lake Basin changed from warm-dry to *** 1958 to 2018,the increase in precipitation and the decrease in evaporation controlled the change of the lake volume,which were the main climatic factors affecting the lake volume *** 1977 to 2018,the measured water yield showed an"increase-decrease-increase"fluctuation in the qinghai Lake *** effects of climate change and LUCC on the measured water yield were obviously *** 1977 to 2018,the contribution rate of LUCC was -0.76% and that of climate change was 100.76%;the corresponding rates were 8.57% and 91.43% from 1977 to 2004,respectively,and -4.25% and 104.25% from 2004 to 2018,*** analysis of the effects and contribution rates of climate change and LUCC on the qinghai Lake volume revealed the scientific significance of climate change and LUCC,as well as

关键词： climate change land use/cover change water yield lake volume contribution rate qinghai Lake Basin qinghai-Tibetan Plateau

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Web-system for processing and visualization of meteorological data for Siberian environment research

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International Journal of Digital Earth 2009年第S1期2卷 105-119页

作者： A.Titov E.Gordov I.Okladnikov T.Shulgina Institute of monitoring of Climatic and ecological Systems SB RAS TomskRussia Siberian center for environmental Research and Training TomskRussia

At present,mainly GIS software is used for exploration and visualization of spatially distributed *** the same time an approach based on the combination of advanced web technologies along with the standard rules of information-computational system development is more suitable for performing tasks requiring more sophisticated data *** this report,functional capabilities of the information-computational system created for meteorological and climatic data processing and online visualization are *** system represents a dedicated web-interface,which allows performing of mathematical and statistical operations on the diverse observational and model data and to determine characteristics of global and regional climate *** such datasets as NCEP/NCAR Reanalysis,ECMWF ERA-40 Reanalysis,*** available for *** particular,the system allows calculating of temporal average and extremum values,time trends,*** arbitrary spatial and temporal ranges for different meteorological *** possibility of online intercomparison of meteorological characteristics calculated for different datasets is also realized in the *** final version of the system being developed is supposed to find application in meteorological and climatological investigations and should help researchers to save time during performing routine analytical tasks by simplifying handling of huge arrays of spatially distributed meteorological data.

关键词： climate change geoinformatics global environmental change visualization

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A novel method through solid phase extraction combined with gradient elution for concentration and separation of 66(ultra)trace persistent toxic pollutants in Antarctic waters

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Chinese Chemical Letters 2016年第3期27卷 405-411页

作者： Li Zhang Guang-Shui Na Chun-Xiang He Rui-Jing Li Hui Gao Lin-Ke Ge Yan-Jie Wang Yao Yao School of Chemistry and Chemical Engineering Liaoning Normal University Key Laboratory for ecological Environment in Coastal Areas (SOA) National Marine Environmental Monitoring Center

This study developed a method to perform the simultaneous concentration and selective separation of 66 （ultra） trace persistent toxic substances in Antarctic waters. The substances included 30 polychlorinated biphenyls, 17 organochlorine pesticides, 16 polycyclic aromatic hydrocarbons, 3 hexabromocyclododecanes. Solid phase extraction was performed using a C18 membrane and silica gel column. Gradient elution was conducted using organic solvents with different polarities; as a result, the efficiency of the C18 film is improved and the interferences from impurities and target compounds are eliminated. Extracts were subsequently analyzed through gas chromatography or liquid and gas chromatography coupled to tandem mass spectrometry. Method validation yielded the following values： recoveries of all target analytes in the Antarctic water ranged from 87.3% to 117.6% and reproducibility as percent relative standard deviation was lower than 5%. Quantification limits ranged from 0.004 μg L^-1 to 0.030 μg L^-1. The established method improved the recoveries and reduced the limits of detection. Results indicated the method exhibited good performance in the simultaneous concentration and selective separation of 66 （ultra） trace organic pollutants; Therefore, the proposed sample pretreatment can potentially eliminate the effects of various classes of impurities to some extent.

关键词： Polychlorinated biphenyls(PCBs) Organochlorine pesticides(OCPs) Polycyclic aromatic hydrocarbons(PAHs) Hexabromocyclododecanes(HBCDs) Solid phase extraction(SPE) Gradient elution

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Spatial-temporal heterogeneity of ecological quality changes across the qinghai-Tibet Plateau under the influence of climate factors and human activities

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Research in Cold and Arid Regions 2024年第3期16卷 129-140页

作者： ZiPing Zhang YuWei Cui WenJia Tang Sen Li qinghai Province ecological and environmental monitoring center XiningQinghai 810007China Key Laboratory of Desert and Desertification Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China University of Chinese Academy of Sciences Beijing 100049China

Over the last few decades,the ecological quality of the qinghai–Tibet Plateau(QTP)has significantly changed due to climate warming,humidification,and increasing human ***,evaluating this region's ecological quality and dominant factors is crucial for sustainable *** this study,the changes in the ecological quality on the QTP from 2000 to 2020 were evaluated based on aggregated indices and Sen–MK trend analyses,and the dominant factors affecting the ecological quality of the QTP were quantitatively analyzed using decision tree *** results revealed that(1)the ecological quality of the QTP exhibited an overall high trend in the east and a low pattern in the west;(2)the ecological quality of the QTP significantly increased from 2000 to 2020,and human activities were the dominant factors causing this change;and(3)the changes in the ecological quality and dominant factors exhibited obvious spatiotemporal *** area with an improved ecological quality occurred mainly in the northern QTP *** was governed by human activities and *** contrast,the area with a deteriorated ecological quality occurred largely in the southern QTP region and was dominated by human activities and *** 2000–2010 period was the most significant period of heterogeneity regarding of ecological quality and its driving factors.(4)The change in the ecological quality was mainly affected by the synergistic relationship between human activities and climate change in this region,which encompassed multiple dominant *** study provides important information on the spatiotemporal heterogeneity of ecological quality change and its dominant factors on the QTP and offers systematic guidance for the planning and implementation of ecological protection projects.

关键词： Remote sensing-based ecological index(RSEI) Dominant factors Synergies and trade-offs qinghai‒Tibet Plateau

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Distribution and characteristic of PAHs in snow of Fildes Peninsula

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Journal of environmental Sciences 2011年第9期23卷 1445-1451页

作者： Guangshui Na Chunyang Liu Zhen Wang Linke Ge Xindong Ma Ziwei Yao Key laboratory for ecological Environment in Coastal Areas National Marine Environmental Monitoring Center Dalian 116023 China School of Bio- Technology Dalian Polytechnic University Dalian 116034 China

Polycyclic aromatic hydrocarbons （PAHs） investigation in different matrices has been reported largely,whereas reports on snow samples were ***,as the main matrix in the polar region,has an important study *** in snow samples were analyzed to investigate the distribution and contamination status of them in the Antarctic,as well as to provide some references for global migration of *** samples collected in Fildes Peninsula were enriched and separated by solid-phase membrane disks and eluted by methylene dichloride,then quantified by gas chromatography/mass *** types of PAHs were detected except for Benzo（a）*** component analysis method was applied to characterize *** factors （Naphthalene,Fluorene and Phenanthrene） accounted for 60.57%,21.61% and 9.80%,*** results showed that the major PAHs sources maybe the atmospheric transportation,and the combustion of fuel in Fildes *** comparison of concentration and types of PAHs between accumulated snow and fresh snow showed that the main compound concentrations in accumulated snow samples were higher than those in fresh *** risk assessment indicated that the amount of PAHs in the snow samples would not lead to ecological risk.

关键词： PAHs snow Antarctic principal component analysis risk assessment

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Assessing the Connectivity of a Regional Fractured Aquifer Based on a Hydraulic Conductivity Field Reversed by Multi-Well Pumping Tests and Numerical Groundwater Flow Modeling

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Journal of Earth Science 2023年第6期34卷 1926-1939页

作者： Jingjing Lin Rui Ma Ziyong Sun Liansong Tang School of environmental Studies State Key Laboratory of Biogeology and Environmental GeologyChina University of GeosciencesWuhan 430078China Yangtze River Basin ecological Environment monitoring and Scientific Research center Yangtze River Basin Ecological Environment Supervision and Administration BureauMinistry of Ecological EnvironmentWuhan 430010China

Aquifer connectivity could greatly affect groundwater flow and further control the contaminant transport in fractured ***,assessing connectivity of fractured aquifer at regional scales is still a challenge because such connectivity is difficult to be measured *** study proposes a framework for assessing connectivity of a fractured aquifer,with Qitaihe area,Heilongjiang Province,northeastern China as an illustrating study *** 3-D finite difference numerical models were established to interpret the results of three multi-well pumping tests and inversely estimate the distribution of hydraulic conductivity(K)in the fractured aquifer.A static connectivity metric of the minimum hydraulic resistance(MHR)was calculated,based on the optimized K-field,to evaluate the hydraulic connectivity in the aquifer,and the corresponding least resistance paths(LRPs)were *** results indicate a better horizontal connectivity in the fractured aquifer in the northeastern and middle parts than in the southwestern part of the study *** identified LRP indicated that the preferential flow channels at regional scales were controlled mainly by aquifer connectivity instead of local high-K *** results of this study can provide a method for aquifer connectivity estimation at regional scales.

关键词： numerical modeling aquifer connectivity groundwater flow hydraulic conductivity minimum hydraulic resistance least resistance paths

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