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Characterization of Nutrients,Heavy Metals,Petroleum and Their Impact on Phytoplankton in laizhou bay:Implications for Environmental Management and Monitoring

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Journal of Ocean University of China 2024年第3期23卷 822-834页

作者： WANG Kai ZHAO Linlin ZHU Yugui YANG Liqiang WANG Yunfeng HONG Xuguang College of Marine Life Science Ocean University of ChinaQingdao 266003China First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China College of Fisheries Ocean University of ChinaQingdao 266003China Institute of Oceanology Chinese Academy of SciencesQingdao 266071China Southern Marine Science and Engineering Guangdong Laboratory Guangzhou 511458China

The laizhou bay(LB)represents a substantial ecological area that is vulnerable to human activities and confronts diverse environmental challenges.This study provides a comprehensive characterization of nutrients,petroleum,heavy metals,and phytoplankton community structure across seven distinct areas in LB.The results indicate relatively high concentrations of NO_(2)-N,SiO_(4)-Si,and NO_(3)-N in the Southwest laizhou bay(SWLB)and Huanghe River Estuary(HRE).In contrast,the East laizhou bay(ELB)and the North of Huanghe River Estuary(NHRE)exhibit the highest concentrations of heavy metals(As,Cr and Hg).The areas with high phytoplankton density and community diversity are mainly located in the SWLB.After adjusting for basic environmental factors,phytoplankton density and Margalef richness index D are significantly associated with nutrients(NO_(3)-N,NO_(2)-N,NH_(4)-N,SiO_(4)-Si),and heavy metal(Cr)concentrations.We highlight that,in addition to Xiaoqinghe River,nutrients brought by the Mihe River in the SWLB and heavy metal(Cr)pollution in the ELB resulting from industrial and mining activities along the coast significantly influence phytoplankton growth and community structure.Therefore,it is recommended that more monitoring and management efforts be focused on these regions in the future.

关键词： Huanghe River Estuary laizhou bay nutrients heavy metals phytoplankton biodiversity

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Simulation of transport mechanism of radium isotopes in aquifer on the southern coast of laizhou bay

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海洋学报:英文版 2023年第8期42卷 40-48页

作者： Yancheng Wang Guangquan Chen Hongjun Yu Xingyong Xu Yinqiao Zou Wenqing Zhao Weitao Han Wenzhe Lyu Zhen Cui Runtian Ding Key Laboratory of Marine Geology and Metallogeny First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory for Marine Geology Laoshan LaboratoryQingdao 266237China Fourth Institute of Oceanography Ministry of Natural ResourcesBeihai 536000China Weifang Institute of Marine Development Weifang 261041China State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200241China Qingdao Hailukong Environmental Automatic-control Engineering Co. Ltd.Qingdao 266000China

Naturally occurring radium(^(223)Ra,^(224)Ra,^(226)Ra,and^(228)Ra)isotopes have been widely applied as geochemical tracers in marine environments,especially when estimating the submarine groundwater discharge(SGD).In this sense,the influencing factors and transport mechanism of radium isotope activity in aquifers can be key information for SGD estimation.This work evaluates the adsorption/desorption behavior of^(224)Ra and^(226)Ra in the solid-liquid phase through a leaching experiment and analysis of field data.The results suggested that radium isotope activity was positively correlated with salinity and grain size,in the case of abundant sediments.Through ion analysis,we found that the ions(Na^(+),Ca^(2+),Mg^(2+),and Ba^(2+))exchanged with radium isotopes in the process of transport.A 1-D reactive transport model was established to simulate the transport process of radium isotope in aquifers.The model successfully simulated the variation of radium isotope desorption activity with salinity and was subsequently verified in the field.This study contributes to the understanding of the geochemical behavior of radium isotopes in aquifers and provides guidance for selecting a suitable groundwater endmember in SGD estimation.

关键词： radium adsorption/desorption behavior leaching experiment reactive transport model coastal aquifer laizhou bay

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Spatial variation of lipophilic marine algal toxins and its relationship with physicochemical parameters in spring in laizhou bay,China

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Journal of Oceanology and Limnology 2022年第6期40卷 2242-2255页

作者： Xiuping HE Junhui CHEN Jiuming WANG Xia SUN Ming XIN Baodong WANG Shengkang LIANG Marine Bioresource and Environment Research Center Key Laboratory of Marine Eco-Environmental Science and TechnologyFirst Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Qingdao Key Laboratory of Analytical Technology Development and Standardization of Chinese Medicines Qingdao 266590China Shandong University of Science and Technology Qingdao 266590China Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationOcean University of ChinaQingdao 266100China

Lipophilic marine algal toxins(LMATs)are produced by some toxigenic microalgae,which pose a serious threat to marine ecosystem and even human health.The occurrence and environmental control factors of LMATs in the surface seawater and phytoplankton in spring in laizhou bay in which Huanghe(Yellow)River estuary is included,in Shandong,East China were investigated.Okadaic acid(OA),pectenotoxin-2(PTX2),dinophysistoxin-1(DTX1),pectenotoxin-2 seco acid(PTX2 SA),DTX2,7-epi-PTX2 SA,PTX11,and 13-desmethyl spirolide C(SPX1)were detected from the surface seawater samples,and PTX2,7-epi-PTX2 SA,OA,DTX2,DTX1,PTX2 SA,and PTX11 were discovered in the phytoplankton samples showed a decreasing trend.The concentrations of∑LMATs in the seawater and phytoplankton ranged 2.03-74.38 ng/L on average of 13.72 ng/L and 0.98-479.27 pg/L on average of 50.20 pg/L,respectively.The joint influence of terrigenous input and internal circulation could promote the growth,toxin production,and toxin release of toxin-producing algae,leading to a higher content of LMATs in the bay nearby the Huanghe River estuary in both seawater and phytoplankton.The concentration of LMATs in spring was higher than that in summer,showing obvious seasonal variation.In addition,no significant correlation between most of the physiochemical parameters and LMAT contents in seawater was revealed by correlation analysis except for the positive correlation between DTX2 and chlorophyll a,OA and NH4-N.However,the increase of dissolved inorganic nitrogen content in seawater could enhance the production of OA,DTX1,and DTX2 in phytoplankton due probably to that the inorganic N input could benefit the growth and stimulate toxin production of toxin-producing algae.The result also proved that some PTX2 may be originated from Procentrum spp.and OA,DTXs and part of PTX2 may be originated from Dinophysis spp.

关键词： lipophilic marine algal toxin laizhou bay seawater phytoplankton environmental factor

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Palynoflora and climatic dynamics of the laizhou bay of Bohai Sea,North China Plain,since the late middle Pleistocene

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Journal of Palaeogeography 2023年第2期12卷 278-295页

作者： Wen-Xia Wang Xiu-Li Zhao Shou-Jun Li Lei Zhang Xiao-Li Wang Xiang-Yu Zhang College of Life Sciences Linyi UniversityLinyi 276000Shandong ProvinceChina College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590Shandong ProvinceChina State Key Laboratory of Palaeontology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina

The coastal plain of laizhou bay in Bohai Sea is a transitional area of land-sea interaction.Sediments in this area can bear significant information of sea-level fluctuation,climate change,as well as regional geological setting.Here,in this study,new sporopollen data from three boreholes(GK138,GK111 and GK95)in the coastal plain of laizhou bay,Bohai Sea were investigated,and the pollen spectrum since the late middle Pleistocene was established as six sporopollen assemblage zones(Ⅰ-Ⅵ),i.e.,Pinus-Quercus-Artemisia,Gramineae-Artemisia-Chenopodiaceae,Picea-Pinus-QuercusArtemisia,Picea-Pinus-Betula-Gramineae-Artemisia,Picea-Pinus-Cupressaceae-Chenopodiaceae and Pinus-Quercus-Gramineae-Artemisia-Chenopodiaceae.Combining with existing sedimentary successions and detailed radiocarbon dating results of the sediments from the three boreholes,paleovegetation and climatic evolution since the late middle Pleistocene were reconstructed.The findings revealed that climatic changes in this area since the late middle Pleistocene were characterized by alternating cold-arid and warmhumid conditions,which were well correlated with marine isotopic stages(MIS).The present study offers specific insight into the climatic dynamics in the North China Plain since the late middle Pleistocene and provides evidence of a clear link among the palynoflora in the area,the glacial-interglacial period climatedriven sea-level changes,and the marineδ^(18)O records.

关键词： laizhou bay Late middle Pleistocene Pollen spectrum Palynoflora Climatic dynamics North China Plain

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Sedimentary record of a late Holocene storm event in laizhou bay,Bohai Sea,China

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Journal of Oceanology and Limnology 2023年第3期41卷 909-920页

作者： Zhenqiao LIU Liang ZHOU Shu GAO Longjiang MAO Peng LU State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200046China Marine Geological Institute of Hainan Province Haikou 570100China School of Geography Geomaticsand PlanningJiangsu Normal UniversityXuzhou 221116China School of Marine Sciences Nanjing University of Information Sciences&TechnologyNanjing 210044China Institute of Geography Henan Academy of SciencesZhengzhou 450052China

The Bohai Sea is influenced by numerous extreme oceanic wave events in history.However,it is often difficult to determine the types of these events due to the lack of detailed historical records,causing uncertainty in the reconstruction of historical coastal disasters.We investigated an anomalous sand layer in the Xiliyu Village by the coast of laizhou bay,Shandong,from which an extreme event deposit was identified using a multi-proxy approach including grain size distribution,geochemistry,and magnetic susceptibility.This event was dated 2700–3100 a bp,and caused inundation of a large coastal area of laizhou bay.By comparing historical records with instrumental data,we believe that the event deposit was generated by a severe storm surge with wind speed of>34.9 m/s.

关键词： event layer storm surge deposit multiple proxy analysis winter storms laizhou bay

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Assessment of heavy metal pollution in laizhou bay(China)using the ecological risk index and the integrated biomarker response of the goby Acanthogobius ommaturus

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Journal of Oceanology and Limnology 2023年第4期41卷 1519-1536页

作者： Maosheng LIU Hua XU Qiang ZOU Fei FANG Shan SUN Yuting ZHAO Xin HE Yonghui BO Lei YAO Yan FANG School of Agriculture Ludong UniversityYantai 264025China Yantai Ecological Environment Monitoring Center Yantai 264010China Yantai Branch of Shandong Technology Transfer Center Chinese Academy of SciencesYantai 264003China Shandong Provincial Key Laboratory of Restoration for Marine Ecology Shandong Marine Resource and Environment Research InstituteYantai 264006China

We used the Integrated Biological Responses version 2(IBRv2)method to evaluate the biological eff ects of heavy metals in the sediments in laizhou bay,China on the benthic goby Acanthogobius ommaturus.In December 2018,gobies and sediments were collected from 15 stations.We measured the activities of defense enzymes and the contents of malondialdehyde(MDA)and metallothionein(MT)in the goby liver as well as the levels of heavy metals in the sediments and goby muscle tissue.Most of the heavy metal concentrations in sediment at each station were below the Class I criteria set by Chinese Standards for Marine Sediment Quality,and the Håkanson ecological risk index suggested low risk for the heavy metals.We found that A.ommaturus could eff ectively accumulate mercury,cadmium,arsenic,and zinc and that the contents of MT and MDA and the activities of glutathione peroxidase and glutathione reductase were suitable biomarkers of heavy metal pollution in this species.The IBRv2 method integrated these four biomarkers and discriminated stations according to heavy metal pollution.Higher IBRv2 values suggested more adverse eff ects in gobies,corroborating more serious heavy metal contamination.The stations with high IBRv2 values and high contents of heavy metals were mainly distributed in the west and northeast parts of the bay.These results show that the IBRv2 approach is a feasible strategy for assessing heavy metal pollution through biological response and biological status and that it can be implemented for environmental monitoring in laizhou bay.

关键词： integrated biomarker responses heavy metal assessment goby Acanthogobius ommaturus laizhou bay

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Impact of typhoon Lekima(2019)on material transport in laizhou bay using Lagrangian coherent structures

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Journal of Oceanology and Limnology 2022年第3期40卷 922-933页

作者： Qi LOU Zhengyan LI Yanwei ZHANG Yilei FENG Xueqing ZHANG College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Science and Numerical Modeling Ministry of Natural Resources(MNR)Qingdao 266061China

Typhoon has an impact on an estuary and coastal environment.However,the present research lacks the detailed description of material transport processes during typhoon passage,such as the transport channels and barriers in the course of material transport and material accumulation area,etc.Therefore,Lagrangian coherent structures(a method developed for describing the transport structure of fluids in recent years)was introduced to investigate and predict the floating material and debris transport process in the laizhou bay,Bohai Sea,during typhoon Lekima in 2019.Results show that the Lagrangian coherent structure could well explain the complex flow phenomena in the bay.During the typhoon,the general direction of floating material transport in the laizhou bay was anticlockwise.There was a channel for material transport in the northwest and south of the bay,and there are transportation obstacles in the northeast-southwest direction in the middle of the bay.Therefore,the typhoon might worsen the water quality.These results provide references for precise countermeasures to control the formulation of pollution in the laizhou bay.

关键词： material transport typhoon Lagrangian coherent structures laizhou bay

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Active fault survey on the Tanlu fault zone in laizhou bay

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Acta Seismologica Sinica(English Edition) 2006年第5期19卷 530-541页

作者：王志才邓起东杜宪宋晁洪太吴子泉肖兰喜孙昭民闵伟凌宏杨希海李长川 Earthquake Administration of Shandong Province Institute of Geology China Earthquake AdministrationBeijing 100029China Institute of Geology China Earthquake Administration

Shallow-depth acoustic reflection profiling survey has been conducted on the Tanlu fault zone in laizhou bay. It is found that the Tanlu fault zone is obviously active during the late Quaternary and it is still the dominating structure in this region. The Tanlu fault zone consists of two branches. The KL3 fault of the western branch is composed of several high angle normal faults which had been active during the period from the latest Pleistocene to early Holo- cene, dissected by a series of northeast or approximate east-west trending fault which leaped sediment of the late Pleistocene. The Longkou fault of the eastern branch consists of two right-laterally stepped segments. Late Quaternary offsets and growth strata developed along the Tanlu fault zone verify that the fault zone retained active in the latest Pleistocene to the early Holocene. The Anqiu-Juxian fault that passes through the middle of Shandong and corresponds to the Longkou fault is composed of a series of right-laterally stepped segments. The active faults along the eastern branch of the Tanlu fault zone from the laizhou bay to the north of Anqiu make up a dextral simple shear deformation zone which is characterized by right-lateral strike-slip movement with dip-slip component during the late Quaternary.

关键词： active fault survey Tanlu fault zone laizhou bay

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Spatial Heterogeneity of Marine Environment Changes:A Case Study in laizhou bay and Its Adjacent Waters,China

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Journal of Ocean University of China 2021年第1期20卷 111-123页

作者： WANG Youxiao YU Ge HU Guobin LIU Dahai College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Environment and Ecology Ministry of EducationQingdao 266100China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Marine Life Sciences Ocean University of ChinaQingdao 266003China First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China

Temporal and spatial heterogeneity identifications of marine environment and its changes have great significances in marine spatial planning and offshore pollution control.In this study,considering the integration of marine ecological environment and sea-land interaction,we built a spatialized evaluation model named Marine Environment Change Spatial Assessment(MECSA)to quantify the marine environment status and changes.In MECSA,we applied the geospatial model and the pressure-state-response(PSR)model for processing and integrating evaluation indicators.A case study in the laizhou bay showed that the marine environment quality was generally in a declining state from 2009 to 2015.In 2015,the Marine Environment Index(MEI)had decreased by 0.1 compared with 2009,although the two years all reached a‘Good'level.The spatial MEI layers of the two years showed a same distribution:the southwestern part was in poorer status,with a fan ring shape gradually getting better to the northeast.The Marine Organisms Response Index(MORI)contributed the most to the MEI.Therefore,future marine environmental assessment and spatial planning should focus on the identification the marine environment with its changes from the perspective of spatial heterogeneity and systemicity.Based on single indicators and comprehensive evaluation results,we can propose spatially targeted policies and recommendations scientifically.

关键词： marine environment quality spatial heterogeneity PSR laizhou bay

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Source Evolution and Its Relationship to Climate Change Since the Middle–Late Pleistocene in laizhou bay, China

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Journal of Ocean University of China 2020年第1期19卷 113-123页

作者： GONG Chuanzhang LI Guangxue LIU Yong DING Dong XU Jishang MA Yanyan QIAO Lulu and WANG Haoyin College of Marine Geosciences Ocean University of ChinaQingdao 266100China Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of EducationOcean University of ChinaQingdao 266100China

Through the geochemical analysis of two hundred-meters cores KD4 and ZK3 from laizhou bay,in this study,we determined the distribution law and controlling factors of the geochemical elements.We analyzed 24 elements with respect to their R factors and major principal components,which were combined with the source discrimination functions DFCr/Th and DFCa/Al to obtain the sediment source index and its variation with depth for this area.A comparison of the changes in climate indicators suggests a clear correlation between the source and climate changes.The results show that the Yellow River and surrounding short-term rivers are the main sediment sources in this area.The PC3 of the KD4 core and PC2 of the ZK3 core(e.g.,CaO,MnO,SiO2)exhibit significant variations and reflect the relative contributions of Yellow River sources.The deposition process can be divided into six stages:in Phase I(MIS 5c–MIS 5a),the Yellow River formed,and the composition of the Yellow River had a greater influence on the sedimentary composition of the study area.In Phase II(MIS 5a–MIS 3),the sediment sources of the Yellow River and the short-term streams in this area were wavering,with the sediments derived from short-term rivers playing a more important role.In Phase III(MIS 3),with a sharp drop in temperature,the study area was in the process of retreat,and the sediment source changed from the Yellow River to short-term rivers,after which the Yellow River source material remained the main sediment source for the region.A similar process occurred three more times in Phase IV(MIS 3–MIS 2),Phase V(MIS 2–MIS 1),and Phase VI(MIS 1).With changes in climate,especially during alternating sea-land phases,the sediment source varied in marine-terrestrial-marine phases,and the changes are observed as Yellow River source-surrounding provenance-Yellow River source.However,this process of change is not synchronized with the sea-land strata alternation.

关键词： laizhou bay source geochemistry Yellow River climate change

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