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Responding of zooplankton to environmental factor changes in the Changjiang River estuarine regions in spring-summer from 2016 to 2020 认领 引用 被引量：1
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作者 Jieqing YANG Dongrong ZHANG +4 位作者 Yuange CHEN Longling OUYANG Yangyang YANG Jin ZHOU Yunrong SHI 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2024年第2期544-559,共16页
The estuarine areas are under frequent influence from freshwater intrusion and ocean currents,in which zooplankton species are diversified and variable as they are sensitive to physio-chemical variations in water.Ther... The estuarine areas are under frequent influence from freshwater intrusion and ocean currents,in which zooplankton species are diversified and variable as they are sensitive to physio-chemical variations in water.Therefore,understanding the relationships between zooplankton and environmental factors help us know the water quality.To achieve co-existence with species in similar ecological group or habit,they could inevitably alter themselves to fit the ecology and adjust the function according to the competitive exclusion in ecological theory.However,information of the co-existence of dominant species in the Changjiang(Yangtze)River estuary(CRE)and adjacent waters remains scarce.We explored the relationships between dominant zooplankton and environmental factors in the study region in spring-summer from 2016 to 2020,involving particularly the composition of dominant species,ecological groups,their relationships with environmental factors,and co-existence of important species,using the non-multidimensional scale analysis(nMDS)method and redundancy analysis.Results show that Labidocera euchaeta and Tortanus vermiculus were dominant species in the study scope.The turnover rate of dominant zooplankton was greater(>50%)in spring while the species number was higher in summer.The dominant species were estuarine,offshore,and eurytopic based on the adaptation to salinity.In spring,the ecological groups were dominated by estuarine species,while in summer by estuarine and offshore species.In addition,the nMDS showed that the dominant species in the same ecological group were more dispersed and not prominently clustered;the dominant species were staggered among different ecological groups.The temperature,salinity,pH,dissolved oxygen,and chlorophyll a were the main environmental factors on the distribution of the dominant species in spring,while in summer were dissolved oxygen,temperature,salinity,and pH.The domination of medusae of Nemopsis bachei and Pleurobrachia globosa in zooplankton community in spring,and the continuous decrease in abundance of L.euchaeta reflected the effects of local climate change.The temperature and salinity changes in different years and the subsequent response of zooplankton reflected the influence of freshwater intrusion and/or ocean currents.Zooplankton in similar ecological habits exhibited the competitive exclusion in terms of co-existence. 展开更多
关键词 Changjiang River estuary(CRE) zooplankton dominant species ecological group environmental factor co-existence
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The spatial multiscale variability of heavy metals based on factorial kriging analysis: A case study in the northeastern Beibu Gulf 认领 引用 被引量：5
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作者 ZHAO Jianru CHU Fengyou +4 位作者 JIN Xianglong WU Qingsong YANG Kehong GE Qian JIN Lu 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2015年第12期137-146,共10页
Factorial kriging analysis is applied to the research on the spatial multiscale variability of heavy metals in submarine. It is used to analyze the multiscale spatial structures of seven heavy metals, Ni, Cu, Zn, Pb, ... Factorial kriging analysis is applied to the research on the spatial multiscale variability of heavy metals in submarine. It is used to analyze the multiscale spatial structures of seven heavy metals, Ni, Cu, Zn, Pb, Cr, As and Cd in the surface sediment from the northeastern of Beibu Gulf, identify and separate spatial variations at different scales of heavy metals, and discuss the provenance of heavy metals and the influencing factors. The results show that the existence of three-scale spatial variations those consist of nugget effect, a spherical structure with range of 30 km（short-range scale） and a spherical structure with range of 140 km（long-range scale） in the linear model of coregionalization fitted. The spatial distribution features of seven heavy metals at short-range scale reflect ＂spot-like＂ or ＂stripe-like＂ local-scale spatial variations; the spatial distribution features of the seven heavy metals at long-range scale represent ＂slice-like＂ regional-scale spatial variations. At local scale, Zn, Cr, Ni,Cu, Pb and Cd are derived primarily from parent materials of Hainan Island, Leizhou Peninsula and Guangxi land, whose spatial distribution characteristics are controlled by granularity of sediments, while As is influenced dominantly by human pollution components from Hainan Island and Leizhou Peninsula. At regional scale, Zn,Cr, Ni and Cu originate primarily from parent rock materials of Leizhou Peninsula and Hainan Island, secondly from Guangxi land; As originated primarily from parent rock materials from Hainan Island, secondly from Leizhou Peninsula and Guangxi land. These metals are transported and migrated with sediments dominated by the anticlockwise circulation of Beibu Gulf year-round, deposited in ＂convergence center＂, forming the whole sedimentary pattern in direction of NWW-NNW at regional scale. The difference in distribution type between As and other metals at regional scale is mainly due to their different geochemical behavior. 展开更多
关键词 spatial multiscale variability heavy metals factorial kriging analysis sediments northeastern Beibu Gulf
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Nitrogen removal capacity and influencing factors of inland wetland under human activities:Jiashan County,China 认领 引用
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作者 Niu Li Youzheng Zhang +5 位作者 Jinlong Wu Junzhen Li Jingwen Gao Pengcheng Jiang Xiaoqi Ye Ming Wu 《River》 2024年第4期438-446,共9页
Inland wetlands play a vital role in mitigating non-point source nitrogen loads through denitrification and anammox processes.However,the impact of varying human activities within the same region on these nitrogen rem... Inland wetlands play a vital role in mitigating non-point source nitrogen loads through denitrification and anammox processes.However,the impact of varying human activities within the same region on these nitrogen removal processes of inland wetlands remains unclear.This study investigated the differences in nitrogen removal rates of wetland sediments under various human activities in Jiashan County,China.15N isotope tracing was used to determine denitrification and anammox rates.Denitrification was the primary nitrogen removal pathway,with an average contribution of 82.34%.Denitrification and anammox rates varied significantly under different human influences,with the highest rates in residential and agricultural areas.NH4+,chlorophyll a,NO3−,and pH were the main environmental factors.This study highlights the need for targeted wetland management and restoration strategies based on the type and intensity of human activities.Protecting and restoring these“natural purifiers”is crucial for improving regional water quality and maintaining the ecological functions of wetlands in rapidly urbanizing landscapes. 展开更多
关键词 anthropogenic influence nitrate reduction nitrogen elimination efficiency wetland
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Distinct root system acclimation patterns of seagrass Zostera japonica in sediments of different trophic status:a research by X-ray computed tomography 认领 引用
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作者 Xiaoyue SONG Yi ZHOU +7 位作者 Jiangning ZENG Lu SHOU Xiaomei ZHANG Shidong YUE Wei GAO Weihua FENG Zhifu WANG Ping DU 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2021年第6期2267-2280,共14页
Conspecific seagrass living in differing environments may develop different root system acclimation patterns.We applied X-ray computed tomography(CT)for imaging and quantifying roots systems of Zostera japonica collec... Conspecific seagrass living in differing environments may develop different root system acclimation patterns.We applied X-ray computed tomography(CT)for imaging and quantifying roots systems of Zostera japonica collected from typical oligotrophic and eutrophic sediments in two coastal sites of northern China,and determined sediment physicochemical properties that might influence root system morphology,density,and distribution.The trophic status of sediments had little influence on the Z.japonica root length,and diameters of root and rhizome.However,Z.japonica in oligotrophic sediment developed the root system with longer rhizome node,deeper rhizome distribution,and larger allocation to below-ground tissues in order to acquire more nutrients and relieve the N deficiency.And the lower root and rhizome densities of Z.japonica in eutrophic sediment were mainly caused by fewer shoots and shorter longevity,which was resulted from the more serious sulfide inhibition.Our results systematically revealed the effect of sediment trophic status on the phenotypic plasticity,quantity,and distribution of Z.japonica root system,and demonstrated the feasibly of X-ray CT in seagrass root system research. 展开更多
关键词 Zostera japonica root system acclimation pattern sediment trophic status X-ray computed tomography
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Evaluation of the Bioavailability of Metals in Sediment from the Southern Coastal Wetland of the Qiantang Estuary by Using Diffusive Gradients in Thin Films Technique 认领 引用
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作者 FENG Weihua WANG Zhifu +3 位作者 ZHU Wenzhuo ZHENG Fangqin ZHANG Dongrong XU Hengtao 《Journal of Ocean University of China》 SCIE CAS CSCD 2022年第2期375-387,共13页
Metal pollution has become an major issue governing the wetland ecosystem health.The southern coastal wetland of the Qiangtang Estuary are facing unusual perturbation due to rapid development along the embayment in re... Metal pollution has become an major issue governing the wetland ecosystem health.The southern coastal wetland of the Qiangtang Estuary are facing unusual perturbation due to rapid development along the embayment in recent decades.This study evaluated the bioavailability of metals(Cu,Pb,Cd,Cr and Zn)in the sediment of the southern coastal wetland of the Qiangtang Es-tuary using diffusive gradients in thin films(DGT)techniques and compared with several methods based on total metal content.The results showed that the contents of Cr,Pb,Cd and Cu in sediment,as detected using DGT,were considerably correlated with the exchangeable fraction and the content in Phragmites australis roots,while a weak correlation was observed for Zn.Therefore,DGT analysis could be used to evaluate the bioavailability and potential risk of Cr,Cd,Pb and Cu for P.australis.Quantitative indices,such as DGT concentration,bioaccumulation in P.australis,geoaccumulation index(Igeo)and potential ecological risk index(RI),revealed that Cd was a major potential ecological risk factor along the southern coast wetland of the Qiantang Estuary,especially in the upstream region,which is potentially more vulnerable to the anthropogenic pollution. 展开更多
关键词 diffusive gradients in thin films estuarine wetland metal bioavailability
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Monitoring and Evaluation of Present Situation of Environmental Quality in the Sea Area near the Aojiang Estuary in Wenzou 认领 引用 被引量：1
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作者 Ye Maosen Yang Dan +4 位作者 Zhang Rongbao Xu Hengtao Zhang Haisheng Yao Dongping Ye Xinrong 《Meteorological and Environmental Research》 2017年第3期57-61,66,共5页
Based on the monitoring results of environmental quality in the sea area near the Aojiang estuary in Wenzou during 2010-2012,the present situation of environmental quality in the sea area was analyzed and evaluated. T... Based on the monitoring results of environmental quality in the sea area near the Aojiang estuary in Wenzou during 2010-2012,the present situation of environmental quality in the sea area was analyzed and evaluated. The results show that p H,DO,CODMn,petroleum,and heavy metals( Cu,Pb,Zn,Cd,Hg,As and Cr) in the sea area near the Aojiang estuary did not exceed the second-class standard of Seawater Quality Standard( GB 3097-1997),but both inorganic nitrogen and reactive phosphate in the sea area exceeded the second-class standard seriously,and the water quality of the sea area was in an eutrophic state; domestic sewage and fertilizer loss were the main sources of nitrogen and phosphorus. The standard index of most evaluation factors of sediment quality except for Zn was smaller than 1,meeting the demands of sediment quality for environmental protection. 展开更多
关键词 Sea area near the Aojiang estuary in Wenzou Present situation of environmental quality Monitoring Evaluation Water quality Sediment quality
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Monitoring and Assessment of Current Situation of Environmental Quality in Yueqing Bay 认领 引用 被引量：1
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作者 Yang Dan Zhang Haisheng +4 位作者 Xu Hengtao Song Weihua Lin Bo Yao Dongping Ye Xinrong 《Meteorological and Environmental Research》 2017年第2期73-78,84,共6页
Based on the monitoring results of environmental quality in Yueqing Bay during 2007-2014,the current situation of environmental quality in the bay was analyzed and assessed. The results show that pH,DO,CODMn,petroleum... Based on the monitoring results of environmental quality in Yueqing Bay during 2007-2014,the current situation of environmental quality in the bay was analyzed and assessed. The results show that pH,DO,CODMn,petroleum,and heavy metals( Cu,Pb,Zn,Cd,Hg,As and Cr)in the seawater of Yueqing Bay did not exceed the second class standard of Seawater Quality Standard( GB 3097-1997),but inorganic nitrogen and reactive phosphate in the seawater of Yueqing Bay exceeded the second class standard seriously,and the water quality of the bay was in an eutrophic state; the standard index of evaluation factors of sediment quality was smaller than 1,meeting the demands of sediment quality for environmental protection. 展开更多
关键词 Yueqing Bay Current situation of environmental quality Monitoring Assessment Water quality Eutrophisation
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Detection of Persistent Organochlorine Pollutants in Eggs of Antarctic Seabirds Based on Gas Chromatography and Their Ecological Environment Significance 认领 引用 被引量：1
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作者 Ye Maosen Zhang Rongbao +4 位作者 Chen Lihong Lin Bo Zheng Fangqin Lu Bing Ye Xinrong 《Meteorological and Environmental Research》 2016年第1期48-51,54,共4页
By using internal standard method based on gas chromatography-electron capture detector （GC-ECD）, the contents of persistent or- ganochlorine pollutants polychorinated biphenyls （PCBs） and organochlorine pesticid... By using internal standard method based on gas chromatography-electron capture detector （GC-ECD）, the contents of persistent or- ganochlorine pollutants polychorinated biphenyls （PCBs） and organochlorine pesticides （OCPs） in eggs of seabirds （ Catharacta Ionnbergi, Cathar- acta maccormicki, Pygoscelis papua and Macronectes giganteus） breeding on King George Island, Antarctica were detected, and their ecological environment significance was discussed. The results showed that the recovery of various compounds ranged from 68.6% to 90.8% ; relative stand- ard deviation （RSD） was 3.6%, and the lowest detection limits of PCBs and OCPs were 0.8 - 16 and 2 - 12 pg respectively, which could meet the demands for the residue analysis of trace persistent organochlorine pollutants in the eggs of Antarctic seabirds. The contents of PCBs, DDTs, HCB and HCHs in the eggs of Antarctic seabirds were 0.5 -515.5, 2.0 -304.4,0.5 -70.5, and 0.5 -2.0 ng/g respectively. In addition, the accumula- tion of PCBs and OCPs in the skuas was enhanced gradually through the food chain. The maximums of persistent organochlorine pollutants ap- peared in the eggs of C. Ionnbergi, followed by the eggs of C. maccomicki. The detection of OCPs and PCBs in the eggs of Antarctic seabirds was not interfered by other compounds containing chlorine, showing that the extraction, purification and detection method was suitable for the analysis of OCPs and PCBs in the eggs of Antarctic seabirds and has high sensitivity and reliability. 展开更多
关键词 Gas chromatography Eggs of Antarctic penguins and skuas Persistent organochlorine pollutants China
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Monitoring and Evaluation of Environmental Quality of the Waters near the Feiyun River Estuary in Wenzou in Recent Years 认领 引用
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作者 Yao Dongping Lin Bo +2 位作者 Zhang Haifeng Zheng Fangqin Ye Xinrong 《Meteorological and Environmental Research》 2019年第4期100-105,109,共6页
Based on the monitoring results of environmental quality of the waters near the Feiyun River estuary during 2011-2016, the current situation of environmental quality of the waters was analyzed and evaluated. The resul... Based on the monitoring results of environmental quality of the waters near the Feiyun River estuary during 2011-2016, the current situation of environmental quality of the waters was analyzed and evaluated. The results showed that pH, DO, COD Mn , petroleum, and heavy metals (Cu, Pb, Zn, Cd, Hg, As and Cr) in the waters near the Feiyun River estuary did not exceed the second-class standard of Seawater Quality Standard (GB 3097-1997), while both inorganic nitrogen and reactive phosphate in the waters exceeded the second-class standard obviously. The water quality of the waters near the Feiyun River estuary was in an eutrophic state. In terms of sediment quality, the standard index of most evaluation factors except for Cu was smaller than 1, meeting the demands of sediment quality for environmental protection. 展开更多
关键词 Waters near the Feiyun River estuary Current situation of environmental quality Evaluation Features of water quality Eutrophication
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Monitoring and Evaluation of Environmental Quality of the Waters near the Oujiang River Estuary in Wenzou 认领 引用
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作者 Lin Bo Zhang Haifeng +3 位作者 Yao Dongping Qian Jian Zheng Fangqin Ye Xinrong 《Meteorological and Environmental Research》 2019年第5期74-80,共7页
Based on the monitoring results of environmental quality of the waters near the Oujiang River estuary from 2010 to 2017,the present situation of environmental quality of the waters was analyzed and evaluated.The resul... Based on the monitoring results of environmental quality of the waters near the Oujiang River estuary from 2010 to 2017,the present situation of environmental quality of the waters was analyzed and evaluated.The results showed that pH,DO,COD Mn ,petroleum,and heavy metal (Cu,Pb,Zn,Cd,Hg,As and Cr) content in the waters near the Oujiang River estuary did not exceed the second-class standard of Seawater Quality Standard (GB 3097-1997),while both inorganic nitrogen and reactive phosphate in the waters greatly exceeded the second-class standard.The water quality near the Oujiang River estuary was in an eutrophic state.In terms of sediment quality,the standard index of most evaluation factors except for Cu was smaller than 1,meeting the demands of sediment quality for environmental protection. 展开更多
关键词 Waters near the Oujiang River estuary Evaluation of environmental quality Characteristics of water quality Eutrophication
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Comparison of hydrodynamic influence between different types of bay reclamations 认领 引用 被引量：3
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作者 许雪峰 何齐齐 +2 位作者 宋丹 杨忠良 俞亮亮 《Journal of Hydrodynamics》 SCIE EI CSCD 2018年第4期694-700,共7页
Different reclamation types to be used for the tidal flat have different hydrodynamic influences on the bay. Numerical experiments based on the land reclamation（LR） and the mariculture reclamation（MR）, respectivel... Different reclamation types to be used for the tidal flat have different hydrodynamic influences on the bay. Numerical experiments based on the land reclamation（LR） and the mariculture reclamation（MR）, respectively, are conducted for the same reclamation project in the Shuangpantu, for quantitative comparisons. Results show that the MR has less influence on the hydrodynamic environment than the LR. The difference is more than 50%. 展开更多
关键词 Hydrodynamic influence land reclamation （LR） mariculture reclamation （MR） numerical modeling tidal fiat
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