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维普期刊数据库博看期刊

江苏徐圩港区表层沉积物重金属污染评价及来源分析

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江苏海洋大学学报（自然科学版） 2024年第2期33卷 23-30页

作者：何烽李昂程铮董志国唐玉泽李镇李加琦毛玉泽江苏香河农业开发有限公司江苏连云港222047 江苏海洋大学海洋科学与水产学院江苏连云港222005 中国水产科学研究院黄海水产研究所山东青岛266071

为科学评估江苏徐圩港区建设开发对周边生态环境的影响,2022年9月测定了徐圩港区表层沉积物10种常见重金属含量,运用单因子污染指数法、潜在生态风险指数法、地质累积指数法、相关性分析和主成分分析,对该港区进行重金属污染评价及来源... 详细信息

为科学评估江苏徐圩港区建设开发对周边生态环境的影响,2022年9月测定了徐圩港区表层沉积物10种常见重金属含量,运用单因子污染指数法、潜在生态风险指数法、地质累积指数法、相关性分析和主成分分析,对该港区进行重金属污染评价及来源分析。调查区域沉积物中所有站位重金属含量均符合第一类海洋沉积物标准,单因子污染指数法显示有个别站位属于中等污染,综合污染指数结果显示,有4个站位属于轻微污染,5个站位属于中等污染。潜在生态风险指数显示沉积物重金属潜在生态风险由高到低为Cd>As>Cu>Ni>Pb>Co>Zn>V>Cr>Mn,综合生态风险指数结果显示仅有1个站位属于严重污染。地质累积指数显示沉积物重金属污染程度由高到低为Cd>As>Zn>Cu>Ni>Mn>Co>Pb>V>Cr,总体污染情况较轻。Cr,V,Co,Pb,Ni和Cu之间具有极显著相关性,Cd与其他重金属元素均无强相关性。PC1(V,Cr,Mn,Co,Ni,Cu,Pb)主要为水产养殖、工业生产、航运交通和自然源的混合源;PC2(Cd)主要为机械制造等工业活动来源;PC3(As,Zn)主要为农业和生活污染等人为来源。Cd是徐圩港区潜在污染重金属,生态风险指数较高,因此应加强对徐圩港区相关重金属的监测,查清重金属污染的主要来源,为生态环境保护和管理提供基础资料。

关键词：表层沉积物重金属生态风险评价相关性分析主成分分析

维普期刊数据库博看期刊

Modeling the frictional torque of a dry-lubricated tapered roller bearing considering the roller skewing

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Friction 2019年第6期7卷 551-563页

作者： Chi ZHANG Le GU yuze mao Liqin WANG Research Lab of Space & Aerospace Tribology Harbin Institute of Technology

In this paper, an equation for the calculation of the frictional torque of a dry-lubricated tapered roller bearing(TRB) is provided in which the effect of the roller skewing is emphasized. Calculations were performed to investigate the effect of the roller skewing on the torque of dry-lubricated TRB for two representative preload methods, that is, axial force preload and axial displacement preload. The results show that a proper roller skewing angle under axial force preload benefits the reduction of the TRB torque. However, the roller skewing angle should not exceed a certain critical value;otherwise, it will cause a steep rise in the TRB torque. Finally, the critical value of the roller skewing angle as a function of the friction coefficient and cage pocket clearance is presented. The developed torque model provides a tool for the internal design and torque optimization of dry-lubricated TRBs.

关键词： tapered roller bearing frictional torque roller skewing dry lubrication

Effects of salinity, carbonate alkalinity, and pH on physiological indicators of nutrition transporter for potential habitat restoration of amphipod Eogammarus possjeticus

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Journal of Oceanology and Limnology 2020年第6期38卷 1925-1935页

作者： XUE Suyan mao yuze WANG Jinye FANG Jianguang ZHAO Fazhen Key Laboratory of Sustainable Development of Marine Fisheries Ministry of AgricultureShandong Provincial Key Laboratory of Fishery Resources and Eco-environmentYellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and TechnologyQingdao 266071China College of Marine Science and Engineering Qingdao Agriculture UniversityQingdao 266109China

The effects of three environmental factors,salinity,carbonate alkalinity,and pH,on the survival,feeding,and respiratory metabolism of Eogammarus possjeticus(Amphipoda:Gammaridae)were investigated *** results show that *** could tolerate a broad salinity *** 24-h lowest median lethal salinity was 2.70,and the highest was *** 24-h median lethal alkalinity and pH were 23.05 mmol/L and 9.91,respectively;both values decreased gradually with *** values of salinity,carbonate alkalinity,and pH resulted in significant differences in the cumulative mortality(P<0.05).The ingestion rate and feed absorption efficiency were significantly affected by the coupling of the three environmental factors(P<0.05).With increases in carbonate alkalinity,salinity,and pH,both ingestion rate and feed absorption efficiency exhibited a downward trend,indicating a decline in feeding ability under high salinity and more alkaline water *** coupling of salinity,carbonate alkalinity,and pH also had a significant effect on respiration and excretion(P<0.05).The oxygen consumption rate increased first and then decreased with increasing carbonate *** the same carbonate alkalinity values,the oxygen consumption rate increased with increasing *** the same carbonate alkalinity and salinity,the oxygen consumption rate initially increased and then decreased with increasing *** O:N ratio first increased and then decreased with increasing carbonate *** carbonate alkalinity was less than 6 mmol/L,the O:N ratio increased with increasing salinity and decreased with increasing *** results demonstrate that changes in salinity,carbonate alkalinity,and pH had a measurable impact on the osmotic pressure equilibrium in *** and affected the energy supply mode(*** of metabolic substrate).

关键词： Eogammarus possjeticus saline and alkaline water survival feeding respiratory metabolism

Effects of rising temperature on growth and energy budget of juvenile Eogammarus possjeticus(Amphipoda:Anisogammaridae)

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Acta Oceanologica Sinica 2021年第9期40卷 82-89页

作者： Suyan Xue yuze mao Jiaqi Li Jianguang Fang Fazhen Zhao Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China Marine Ecology and Environmental Science Laboratory Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

Growth and energy budget of marine amphipod juvenile Eogammarus possjeticus at different temperatures(20℃,24℃,26℃,28℃,30℃,32℃ and 34℃)were investigated in this *** results showed that the cumulative mortality rate increased significantly with rising temperature(p<0.01),and exceeded 50%after 24 h when temperature was above 30℃.With the temperature increasing from 20℃ to 26℃,the ingestion rate and absorption rate increased,but decreased significantly above 28℃(p<0.01),indicating a decline in feeding ability at high *** specific growth rate increased with rising temperature,but decreased significantly(p<0.01)after reaching the maximum value at 24℃.Similarly,the oxygen consumption and ammonia emission rates also showed a trend of first increase and then ***,the O:N ratio decreased first and then increased with rising temperature,indicating that the energy demand of *** juvenile transferred from metabolism of carbohydrate and lipid to *** the energy distribution of amphipods,the proportion of each energy is *** rising temperature,the ratio of the energy deposited for growth accounted for ingested gross energy showing a trend of decrease,while the energy lost to respiration,ammonia excretion,and feces accounted for ingested gross energy being showed a trend of *** seemed that rising temperature increased the metabolism and energy consumption of the amphipods and,meanwhile,decreased the energy used for growth,which may be an important reason for the slow growth and small body size of the amphipods during the summer high-temperature period.

关键词： Eogammarus possjeticus rising temperature growth respiratory metabolism energy budget

Response of phytoplankton to multispecies mariculture:a case study on the carrying capacity of shellfish in the Sanggou Bay in China

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Acta Oceanologica Sinica 2008年第1期27卷 102-112页

作者： GE Changzi FANG Jianguang SONG Xiefa mao yuze YE Naihao Department of Marine Fishery Ocean University of China Qingdao 266003 China Key Laboratory for Sustainable Utilization of Marine Fishery Resource Yellow Sea Fisheries Research Institute Qingdao266071 China

A muhispecies model for shellfish polycuhure in the Sanggou Bay in China used for large-scale long-line cultivation of the Chinese scallop Chlamysfarreri, the Pacific oyster Crassostrea gigas and the kelp Laminaria japonica is presented. The model includes key physical processes which are the transports of matter at the system boundary, and the main biological process that is the primary production and nutrients release from the bottom. By the model, the seasonal fluctuations of phytoplankton biomass and dissolved inorganic nitrogen（DIN） in 1994 are simulated. Furthermore, if the kelp culture scale is kept constant and the Chinese scallop and the Pacific oyster culture scales are adjusted, virtual shellfish farms are funded and responses of phytoplankton to the largescale shellfish culture are simulated. According to these simulated results, the room limitation, and the hypothesis that shellfish will not grow well if the phytoplankton biomass is less than 8.2 mg/m^3 , the expandable multiple of scallop culture k and that of oyster culture y are determined as k = -0.276 5y ＋4.690 5 and 0.133 3k ＋0.006 6y≤0.667 5, where, k （ or y） is equal to 1, the culture scale of scallop （ or oyster） is 8.8 x 109 individuals （or 66 ha, with a density of 59 ind./m^2 ）, and the kelp culture scale is 3 300 ha with a density of 12 ind./m^2.

关键词： multispecies model kelp Chinese scallop Pacific oyster carrying capacity

Iterative FEA Method for Load Distribution of Flexible Supporting Thin-section Ball Bearing

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Journal of Harbin Institute of Technology(New Series) 2015年第1期22卷 9-14页

作者： Ju Shu Liqin Wang yuze mao Yuting Ding School of Mechatronics Engineering Harbin Institute of Technology

To figure out the load distribution of thin-section rolling bearing supported by flexible structure with squirrel cage and the distribution's influence on bearing life,an iterative FEA method is proposed to use the result calculated from the Quasi-Dynamic model based on the rigid support hypothesis. The contact angle,contact position and stiffness of equivalent spring are modified during the iterative FEA to optimize the FEA model,and then the bearings' life can be predicted when the error is below 0.5%. It can be concluded that from the analysis results the load distribution under flexible support is more uniform than that of the rigid support,while the maximum load decreases by 11.2% and bearing life increases by 14.7%. The analysis result of different values of thickness of bearing house,rings and hollow shaft demonstrates the thicknesses of bearing house and hollow shaft have a greater influence on the load's uniformity and bearing's life than those of the rings.

关键词： flexible support with squirrel cage iterative FEA

Assessing the effects of oyster/kelp weight ratio on water column properties: an experimental IMTA study at Sanggou Bay, China

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Journal of Oceanology and Limnology 2020年第6期38卷 1914-1924页

作者： FANG Jinghui FANG Jianguang CHEN Qionglin mao yuze JIANG Zengjie DU Meirong GAO Yaping LIN Fan Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)/Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Key Laboratory of Marine Biotechnology of Zhejiang Province School of Marine SciencesNingbo UniversityNingbo 315211China

Integrated Multi-Trophic Aquaculture(IMTA)is an effective method for sustainable aquaculture as species from different trophic levels could reduce negative effects from fed species in the environment.A proper proportion of different trophic species in an IMTA system could improve the aquaculture production and environmental *** present,research on the proper proportions for farming species is *** investigated the effects of IMTA modes of oyster(Crassostrea gigas)and kelp(Saccharina japonica)in different weight ratios on water quality and carbonate system in a closed enclosure experiment for three days in the Sanggou Bay in Shandong Province,China,in December *** collocation modes in oyster:kelp weight ratio were tested showing as 24:3,24:2,24:1,16:3,16:2,16:1,8:3,8:2,and 8:*** water parameters were determined at 17:00 on Day 1(D1),and 6:00 and 17:00 on Days 2(D2)and 3(D3).As two-way ANOVA showed,all increased parameters(dissolved oxygen(DO),pH,chl a,the carbonate system and pCO2)were significantly related to oyster-kelp modes,and interaction between modes and time were also significant(P<0.05).On the 3th day,the 8:3 mode was the highest in DO,pH,chl a,CO32-(P<0.05),and dissolved inorganic carbon(DIC),HCO3-,CO2,and pCO2 were the lowest(P<0.05).According to previous references and the results of this study,the appropriate oyster:kelp proportion at the beginning of winter is from 8:2 to 8:*** results of this study may help government to optimize the aquaculture structure of Sanggou Bay.

关键词： Integrated Multi-Trophic Aquaculture(IMTA) Pacific oyster Crassostrea gigas kelp Saccharina japonica

Response of Yesso scallop Patinopecten yessoensis to acute temperature challenge: physiological and biochemical parameters

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Journal of Oceanology and Limnology 2019年第1期37卷 321-329页

作者： JIANG Weiwei DU Meirong FANG Jianguang GAO Yaping mao yuze CHEN Qionglin LIN Fan JIANG Zengjie Key Laboratory of Sustainable Development of Marine Fisheries Ministry of Agriculture Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and Technology

Water temperature is generally considered to be a major factor af fecting the physiological and biochemical activities of marine bivalves. Here, the physiological and biochemical responses of Yesso scallop, Patinopecten yessoensis, to acute water temperature changes in summer were studied. Scallops were transferred directly to a lower temperature( T dec treatment)(from 23°C to 15°C) or to a higher temperature( Ti nc treatment)(from 15°C to 23°C) for 72 h, respectively. Results showed that the oxygen consumption and ammonia-N excretion rates of P. yessoensis decreased signi?cantly in the T dec treatment but increased dramatically at 6 h in the Ti nc treatment( P <0.05). In the T dec treatment, hepatopancreas antioxidant enzyme activities, superoxide dismutase(SOD) and catalase(CAT) activities, increased substantially within 72 h( P <0.05). However, a signi?cant decrease in CAT activity was found at 12 h in the Ti nc treatment( P <0.01).A signi?cant enhancement of acid phosphatase(ACP) activity and malondialdehyde(MDA) content was detected when scallops were acutely exposed to a temperature of 15°C. The levels of Cu/Zn-SOD gene expression in their gills up-regulated signi?cantly in response to acute temperature changes( P <0.01). These data suggest that acute temperature change af fects physiological and biochemical functions, and improve our knowledge of P. yessoensis under conditions of thermal stress.

关键词： Patinopecten yessoensis acute water temperature changes physiology biochemical activities

Impact of seawater carbonate variables on post-larval bivalve calcification

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Journal of Oceanology and Limnology 2018年第2期36卷 405-413页

作者： LI Jiaqi mao yuze JIANG Zengjie ZHANG Jihong BIAN Dapeng FANG Jianguang Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Qingdao 266071 China Laboratory of Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China Function Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China National Engineering and Research Center of Marine Shellfish Weihai 264316 China

Several studies have demonstrated that shellfish calcification rate has been impacted by ocean acidification. However, the carbonate system variables responsible for regulating calcification rate are controversial. To distinguish the key variables, we manipulated a seawater carbonate system by regulating seawater pH and dissolved inorganic carbon(DIC). Calcification rates of juvenile blue mussel(M ytilus edulis) and Zhikong scallop(C hlamys farreri) were measured in different carbonate systems. Our results demonstrated that neither [HCO ˉ^+ 3 ], DIC, or p H([H ^+ ]) were determining factors for the shellfish calcification rate of blue mussel or Zhikong scallop. However, a significant correlation was detected between calcification rate and DIC/[H ^+ ] and [CO_3^(2ˉ)] in both species.

关键词： ocean acidification calcification shellfish carbonate system