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Occurrence and possible sources of antibiotic resistance genes in seawater of the South China Sea

FRONTIERS OF enVIRONMenTAL SCIenCE & enGINEERING 2024年第9期18卷 108-0页

作者： Lu, Jian wu, Jun Zhang, Cui Wang, Jianhua He, Xia Chinese Acad Sci Yantai Inst Coastal Zone Res YIC CAS Key Lab Coastal Environm Proc & Ecol Remediat Shandong Key Lab Coastal Environm ProcYICCAS Yantai 264003 Peoples R China Harbin engn Univ Yantai Res Inst Yantai 264006 Peoples R China Guilin Univ Technol Coll Environm Sci & Engn Guilin 541006 Peoples R China

Antibiotic resistance genes (ARGs) might have great effect on ecological security and human health. Oceans are important reservoirs that receive tremendous amounts of pollutants globally. However, information on the proliferation of ARGs in seawater is still limited. This study performed field sampling to investigate the occurrence and distribution of ARGs in seawater of the South China Sea, which is the deepest and largest sea in China. The results showed that the total absolute abundances of ARGs in seawater samples ranged from 2.1 x 103 to 2.3 x 104 copies/mL, with an of 5.0 x 103 copies/mL and a range of 2.2 x 103-1.8 x 104 copies/mL for those with mobile genetic elements (MGEs). Genes resistant to multidrug, aminoglycoside, tetracycline, and fluoroquinolone antibiotics accounted for 77.3%-88.6% of total ARGs in seawater. Proteobacteria and Cyanobacteria represented 32.1%-56.2% and 30.4%-49.5% of microbial community, respectively. Prochlorococcus_MIT9313 and Clade_la were the prevalent genera in seawater of the South China Sea. Complex co-occurrence relationship existed among ARGs, MGEs, and bacteria. Anthropogenic activities had critical influence on ARGs and MGEs. Hospital wastewater, wastewater treatment plant effluent, sewage, aquaculture tailwater, and runoff were determined as the important sources of ARGs in seawater of the South China Sea based on positive matrix factorization analysis.

关键词： The South China Sea Antibiotic resistance genes Mobile genetic element Source apportionment DIVERSITY

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Effect of gastric fluid on adsorption and desorption of endocrine disrupting chemicals on microplastics

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Frontiers of environmental Science & engineering 2022年第8期16卷 193-205页

作者： Jie wu Jian Lu Jun wu CAS Key Laboratory of Coastal environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone Research(YIC)Chinese Academy of Sciences(CAS)Shandong Key Laboratory of Coastal Environmental ProcessesYICCASYantai 264003China University of Chinese Academy of Sciences Beijing 100049China Yantai Research Institute Harbin Engineering UniversityYantai 264006China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Microplastics and endocrine disrupting chemicals are emerging pollutants in the marine environment because of their potential *** effect of gastric fluid on the adsorption and desorption of 17β-estradiol(E2)and 17α-ethynylestradiol(EE2)to microplastics was *** adsorption and desorption isotherms of E2/EE2 on microplastics could be well fitted by the Freundlich model while the Gibbs free energy of these processes were negative,proving that the reaction occurred spontaneously on the heterogeneous surface of the *** ratios of EE2(55%–59%)on PVC were larger than that of E2(49%–55%)to indicate that EE2 was less stable in gastric fluid,which could be explained by the fact that the hydrophobicity of EE2 was greater than E2.E2/EE2 were more easily desorbed from PVC in the gastric fluid and the desorption amount(5.25–12.91/7.19–17.86μg/g)increased by 2.51 times in comparison with that in saline solution(2.22–7.81/2.87–10.80μg/g).The decrease of pH and the increase of ionic strength in gastric fluid could further strengthen desorption of E2/EE2 from *** promotion of gastric juice on desorption of PVC was achieved by reducing the hydrophobicity of the PVC *** desorption rate of E2/EE2 at 18°C and 38°C was respectively 44%–47%/46%–50%and 49%–55%/56%–59%,indicating that PVC loaded with E2/EE2 had a relatively greater risk of releasing pollutants in the gastric fluid of constant temperature marine organisms while higher temperatures exposed higher hazards for variable temperature *** interaction between microplastics and pollutants might be mainly hydrophobic interaction.

关键词： Microplastics Gastric fluid endocrine-disrupting chemicals Adsorption Desorption

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Removal of steroid hormones from mariculture system using seaweed Caulerpa lentillifera

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Frontiers of environmental Science & engineering 2022年第2期16卷 1-11页

作者： Jian Lu Cui Zhang Jun wu CAS Key Laboratory of Coastal environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone Research(YIC)Chinese Academy of Sciences(CAS)Shandong Key Laboratory of Coastal Environmental ProcessesYICCASYantai 264003China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Yantai Research Institute and Graduate School Harbin Engineering UniversityYantai 265501China

The removal of steroid hormones from the mariculture system using seaweeds(Caulerpa lentillifera,Ulva pertusa,Gracilaria lemaneiformis,and Codium fragile)was *** results illustrated that both 17β-estradiol(E_(2))and 17α-ethinylestradiol(EE_(2))could be removed by the seaweeds at different levels,and the Caulerpa lentillifera was the most efficient *** than 90%of E_(2) or EE_(2) at concentration of 10μg/L was removed by Caulerpa lentillifera within 12 *** including initial quick biosorption,the following slow accumulation,and biodegradation might explain the removal mechanisms of E_(2)/EE_(2) by Caulerpa lentillifera.E_(2)/EE_(2) removal was positively related to the nutrient level and the initial concentration of steroid hormone.A significant linear relationship for E_(2) and EE_(2) existed between the initial pollutant concentration and the average removal *** highest removal kinetic constant(k)value was obtained at 30℃as 0.34/h for E_(2) and at 20℃as 0.28/h for EE_(2),demonstrating the promising application potential of Caulerpa lentillifera in the water purification of the industrialized mariculture system with relatively high water *** and efficient removal of E_(2) and EE_(2) by Caulerpa lentillifera was still achieved after 3 cycles in the pilot-scale *** steroid hormones and nutrients in mariculture wastewater could also be simultaneously removed using Caulerpa *** findings demonstrated that Caulerpa lentillifera was the promising seaweed for the removal of steroid hormones in mariculture systems.

关键词： Phycoremediation Steroid hormones Seaweed Mariculture Caulerpa lentillifera

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Metagenomic analysis on resistance genes in water and microplastics from a mariculture system

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Frontiers of environmental Science & engineering 2022年第1期16卷 77-89页

作者： Jian Lu Jun wu Jianhua Wang CAS Key Laboratory of Coastal environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone Research(YIC)Chinese Academy of Sciences(CAS)Shandong Key Laboratory of Coastal Environmental ProcessesYICCASYantai 264003China Yantai Research Institute Harbin Engineering UniversityYantai 264006China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Microplastics existing widely in different matrices have been regarded as a reservoir for emerging *** systems have been observed to host microplastics and antibiotic resistance genes(ARGs).However,more information on proliferation of ARGs and metal resistance genes(MRGs)in mariculture system at the presence of microplastics is *** study used metagenomic analysis to investigate the distribution of ARGs and MRGs in water and microplastics of a typical mariculture *** 18 types including 174 subtypes of ARGs were detected with the total relative abundances of 1.22/1.25 copies per 16S rRNA copy for microplastics/*** resistance genes were the dominant ARGs with the abundance of 0.35/0.42 copies per 16S rRNA copy for microplastics/*** intI1 was dominant gene among 6 detected mobile genetic elements(MGEs)with the abundance of 75.46/68.70 copies per 16S rRNA copy for water/*** 9 types including 46 subtypes of MRGs were detected with total abundance of 5.02×10^(2)/6.39×10^(2)copies per 16S rRNA copy for water/microplastics while genes resistant to copper and iron served as the dominant ***,Bacteroidetes,and Actinobacteria accounted for 84.2%/89.5%of total microbial community in microplastics/*** with relatively high abundance were significantly positively related to major genera,MGEs,and *** in mariculture system could enrich most of MRGs and some ARGs to serve as potential reservoir for these *** findings of this study will provide important information on resistance gene pollution at presence of microplastics in the mariculture system for further proposing suitable strategy of environmental management.

关键词： Antibiotic resistance genes Metal resistance genes Metagenomic analysis Microplastics Mariculture

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海洋双壳类中镉与必需元素的相互作用

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生态毒理学报 2024年第4期19卷 206-216页

作者：张晓宇李斐吉成龙吴惠丰中国科学院烟台海岸带研究所中国科学院海岸带环境过程与生态修复重点实验室山东省海岸带环境过程重点实验室烟台264003 青岛海洋科学与技术国家实验室海洋渔业科学与食物产出过程功能实验室青岛266237 中国科学院大学北京100049

镉(cadmium,Cd)是海洋中常见的重金属污染物,因其有较高的生态风险而备受关注。海洋双壳类因其底栖和滤食的习性极易在体内富集Cd,进而引起氧化应激、信号转导异常和能量代谢紊乱等毒性效应。Cd能通过必需元素的转运载体或通道进入海洋... 详细信息

镉(cadmium,Cd)是海洋中常见的重金属污染物,因其有较高的生态风险而备受关注。海洋双壳类因其底栖和滤食的习性极易在体内富集Cd,进而引起氧化应激、信号转导异常和能量代谢紊乱等毒性效应。Cd能通过必需元素的转运载体或通道进入海洋双壳类体内。海洋双壳类具备一系列防御Cd的机制,如与含硫、氮和硒的配体结合,以减少游离Cd^(2+)浓度并降低氧化应激,从而减轻Cd毒性。而在某些关键的生物学通路中,与Cd大小和电荷相似的必需元素(如钙、铜和锌)能被Cd竞争或取代,导致必需元素稳态发生变化,进而引起机体代谢异常,产生毒性效应。此外,本文介绍了可用于海洋生态毒理学研究的新工具——离子组学,以深入探究多种元素的相互作用。本文为深入了解Cd的毒理机制和海洋生态风险提供重要参考。

关键词：镉海洋双壳类离子互作离子组学

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Fate of microplastics in a coastal wastewater treatment plant: Microfibers could partially break through the integrated membrane system

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Frontiers of environmental Science & engineering 2022年第7期16卷 185-194页

作者： Ying Cai Jun wu Jian Lu Jianhua Wang Cui Zhang CAS Key Laboratory of Coastal environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone Research(YIC)Chinese Academy of Sciences(CAS)Shandong Key Laboratory of Coastal Environmental ProcessesYICCASYantai264003China Yantai Research Institute Harbin Engineering UniversityYantai264006China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao266071China

Rare information on the fate of microplastics in the integrated membrane system (IMS) system in full-scale wastewater treatment plant was available. The fate of microplastics in IMS in a coastal reclaimed water plant was investigated. The removal rate of microplastics in the IMS system reached 93.2% after membrane bioreactor (MBR) treatment while that further increased to 98.0% after the reverse osmosis (RO) membrane process. The flux of microplastics in MBR effluent was reduced from 1.5 × 10^(13) MPs/d to 10.2 × 10^(11) MPs/d while that of the RO treatment decreased to 2.7 × 10^(11) MPs/d. Small scale fiber plastics (ent most of the microplastics from being discharged in the coastal water. These findings suggested that the IMS system was more efficient than conventional activated sludge system (CAS) for the removal of microplastics, while the discharge of small scale fiber plastics through the IMS system should also not be neglected because small scale fiber plastics (< 200 μm) could break through IMS system equipped with the RO system.

关键词： Water reclamation Integrated membrane system Microplastics Removal Coastal zone

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基于频谱分析的雷达信号分选新方法

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指挥控制与仿真 2012年第2期34卷 109-113,127页

作者：孙鹏潘谊春郁春来吴彩华空军雷达学院 95865部队

相参性是现代雷达的普遍性质,利用雷达脉冲之间的相参性,提取相参特征参数,并运用于雷达信号分选,对降低当前信号分选中存在的"漏批"率具有重要的意义。因此在基于频谱分析的相参特征模型基础上,研究了基于最小二乘模板匹配误差的相参特... 详细信息

相参性是现代雷达的普遍性质,利用雷达脉冲之间的相参性,提取相参特征参数,并运用于雷达信号分选,对降低当前信号分选中存在的"漏批"率具有重要的意义。因此在基于频谱分析的相参特征模型基础上,研究了基于最小二乘模板匹配误差的相参特征,并提出了具体应用中的改进措施。仿真结果表明,利用频谱主峰图像最小二乘模板匹配误差这一相参特征参数进行信号分选,可以有效地减少"漏批"率。

关键词：相参信号分选频谱分析最小二乘模板匹配误差

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Proteomic responses induced by metal pollutions in oysters Crassostrea sikamea

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Journal of Oceanology and Limnology 2019年第2期37卷 685-693页

作者： LU Zhen SHAN Xiujuan JI Chenglong ZHAO Jianmin wu Huifeng Key Laboratory of Coastal Zone environmental Processes Yantai Institute of Coastal Zone Research (YIC) Chinese Academy of Sciences (CAS) Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes YICCAS Yantai 264003 China Function Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and Technology Qingdao 266237 China University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Sustainable Development of Marine Fisheries Ministry of Agriculture Shandong Provincial Key Laboratory of Fishery Resources and Ecological Environment Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Qingdao 266071 China

There exist severe metal pollutions along the Jiulongjiang estuary in South China. In order to unravel the biological eff ects caused by metal pollutions, proteomic responses were investigated by two-dimensional electrophoresis-based proteomics in oysters Crassostrea sikamea from metal pollution sites, Jinshan (JS) and Baijiao (BJ), and a relatively clean site, Jiuzhen (JZ), along the Jiulongjiang estuary. Results indicated that metal pollutions mainly induced cellular injuries, oxidative and immune stresses, and disturbed ion homeostasis in oysters C . sikamea from both JS and BJ sites via diff erential pathways. Furthermore, metal pollution enhanced transcriptional initiation in oysters from JS site. In addition, the Cu and Fe pollution might be indicated by the 78 kDa glucose regulated protein and ferritin GF1 in oysters C . sikamea , respectively. The study confirms that proteomics is a promising approach to characterize the underlying mechanisms of responses to metal pollution in oysters.

关键词： metal pollution Crassostrea sikamea biological eff ect proteomics

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Adsorption and desorption of endocrine disrupting chemicals by microplastics

Adsorption and desorption of endocrine disrupting chemicals ...

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第四届全国（海洋）环境微塑料污染与管控学术研讨会

作者： Yuexia Feng Jian Lu Jun wu Jianhua Wang Cui Zhang CAS Key Laboratory of Coastal environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone Research (YIC) Chinese Academy of Sciences (CAS) Shandong Key Laboratory of Coastal environmental Processes YICCAS Yantai Research Institute Harbin Engineering University

Microplastics and endocrine disrupting chemicals are emerging pollutants in the marine environment because of their potential hazards. This study evaluated the adsorption and desorption of 17β-estradiol(E2) and 17α-ethynyl estradiol(EE2) on microplastics in *** effects of microplastic materials and particle sizes on adsorption of E2 and EE2 were ***, effects of salinity, pH, humic acid(HA) concentrations, and initial E2/EE2concentrations on adsorption were also discussed. Increase in salinity, HA concentration, and initial E2/EE2 concentration would enhance adsorption of E2/EE2 on microplastics. Adsorption capacity of E2/EE2 firstly increased to reach the highest at pH of 8.0 and then decreased when pH further increased. Pseudo-second-order kinetics better fitted adsorption data of E2 while pseudo-first-order model yielded better fitting results for EE2. Freundlich isotherm was better to fit the adsorption data of E2 while Langmuir isotherm yielded better fitting results for *** capacity of E2/EE2 on microplastics was over 40% of its adsorption capacity. In addition, the effect of gastric fluid on the adsorption and desorption of E2 and EE2 to microplastics was investigated. The adsorption and desorption isotherms of E2/EE2 on microplastics could be well fitted by the Freundlich model while the Gibbs free energy of these processes were negative, proving that the reaction occurred spontaneously on the heterogeneous surface of the microplastics. Desorption ratios of EE2(55%–59%) on PVC were larger than that of E2(49%–55%) to indicate that EE2 was less stable in gastric fluid, which could be explained by the fact that the hydrophobicity of EE2 was greater than E2. E2/EE2 were more easily desorbed from PVC in the gastric fluid and the desorption amount(5.25–12.91/7.19–17.86μg/g)increased by 2.51 times in comparison with that in saline solution(2.22–7.81/2.87–10.80μg/g).The decrease of pH and the increase of ionic strength in gastric flu

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1940s以来中国大陆岸线变化的趋势分析

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生态科学 2017年第1期36卷 80-88页

作者：毋亭侯西勇中国科学院烟台海岸带研究所烟台264003 中国科学院大学北京100049 福建农林大学资源与环境学院福州350002 福建省土壤环境健康与调控重点实验室福州350002

基于1940s—2014年六个时相的中国大陆岸线数据,利用基于剖面计算的岸线变化速率,在全国、省域与区域三个尺度定量分析中国大陆岸线变化的时空特征,结论如下:1)1940s以来,中国大陆岸线总体以扩张趋势为主;大规模扩张趋势主要发生于淤泥... 详细信息

基于1940s—2014年六个时相的中国大陆岸线数据,利用基于剖面计算的岸线变化速率,在全国、省域与区域三个尺度定量分析中国大陆岸线变化的时空特征,结论如下:1)1940s以来,中国大陆岸线总体以扩张趋势为主;大规模扩张趋势主要发生于淤泥质海岸,空间分布较为集中和连续,而后退趋势主要表现为砂砾质海岸的侵蚀后退,空间分布较为分散;2)在10省市区层面,岸线均是扩张与后退并存,但以扩张趋势为主,其中,天津、河北、上海、江苏岸线的不稳定性最高;3)在32个区域层面,除海州湾至江苏废黄河口岸段,绝大多数区域的岸线均以扩张趋势为主;黄河三角洲、莱州湾南岸、江苏废黄河口至长江三角洲岸段岸线动态度较高;4)近70年来,辽河三角洲至莱州湾南岸岸线持续向海扩张,1990年后,虽然扩张规模有所减小,强度却显著增加;长江三角洲至杭州湾岸段,岸线扩张势头强劲且1990年后更趋增强;杭州湾以南岸线,扩张强度始终较为平稳。总的来说,从位移方向的角度分析中国大陆岸线变化的时空特征,尤其是对扩张与后退热点区域的识别,将有助于海岸带区域环境与生态问题的防治、资源的优化配置以及经济社会的可持续发展。

关键词：中国大陆岸线端点速率线性回归速率加权线性回归速率岸线扩张岸线后退 1940s-2014年

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