检索结果-南通市图书馆

Lagged response of phytoplanktonic photosynthetic competence to variation of nitrogen concentration in Jiaozhou Bay,China

引用

Chinese Journal of Oceanology and Limnology 2013年第6期31卷 1295-1305页

作者：付翔李凡吕振波翟红昌韩博平 Shandong Provincial Key Laboratory of Restoration for marine ecology Shandong Marine Fisheries Research Institute Second Institute of Oceanography SOA Institute of Hydrobiology Jinan University

Fluorescence-based maximal photochemical efficiency, Fv/Fm, is widely used as an indicator to photosynthetic competence in marine systems. It has been considered a useful parameter diagnosing the nutrient stress on phytoplankton photosynthesis, but many studies argue its usefulness. In the present study, we try to find a temporal relationship between Fv/Fm and nitrogen concentration, and provide a possible explanation on the controversy. We continuously measured Fv/Fm and nitrogen concentration once every 10 days from September 2003 to March 2004 at two stations in Jiaozhou Bay, northern China. It was found that Fv/ffm did not significantly correlate to synchronous nitrogen concentration, but the variation （i.e. the change between two adjacent cruises） of nitrogen concentration of the previous cruise and the variation ofFv/Fm of the current cruise were strongly correlated. This result indicates that a time lag exists between the variation of nutrient status and the subsequent Fv/Fm response. Length of the time lag seems just matched the interval of our measurements （10 days）. In the field, direct dependence of Fv/Fm on nitrogen concentration may not be found because of the lagged response of Fv/Fm to nitrogen concentration variations or physiological acclimation. Our results provide a possible way to explain the previously reported conflicting results on the relationship between Fv/Fm and nutrient status. To give a more-accurate estimate about the length of the time lag, an investigation that includes more frequent measurements is needed.

关键词： maximal photochemical efficiency nitrogen correlation analysis time lag phytoplankton

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Molecular monitoring plankton community during jellyfish blooms in the water near the Liaoning Hongyan River Nuclear Power Plant

引用

Journal of Oceanology and Limnology 2023年第5期41卷 1781-1794页

作者： Ming YUE Tiezhu MI Ying LI Xianyu GONG Yu ZHEN Key Laboratory of marine Environment and ecology Ocean University of ChinaMinistry of EducationQingdao 266100China Laboratory for marine ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China

The Liaoning Hongyan River Nuclear Power Plant is located on the east coast of Liaodong Bay in the Bohai Sea,China,and the safety of the cooling water is often threatened by large-scale jellyfish ***,monitoring jellyfish growth,migration,and disappearance is essential to the safety of the nuclear power *** this study,high-throughput sequencing was used to analyze the community characteristics of mesoplankton in the sea area at the inlet and outlet from April to September *** the same time,the micro-individuals of jellyfish(including oosperm,planula,polyps,or ephyra of jellyfish)in the water were detected by real-time fluorescent quantitative PCR(qPCR).Both the maximum abundance of Aurelia coerulea and Nemopilema nomurai in July were detected by high-throughput sequencing and q *** three common taxa of plankton(Paracalanus,Calanoida,and Poaceae)were found in the waters near the inlet and outlet,and the beta diversity of plankton in the waters near the inlet and outlet was low in the same *** on the plankton community composition in the sea water near the inlet,it could be speculated that jellyfish outbreaks would have a significant impact on the plankton via the predation *** maximum mt-16S rDNA copy numbers of *** and *** in the samples from the waters of Liaodong Bay were detected in June 2019,and that of *** showed an increasing trend from north to south,with the jellyfish tending to move to the seawaters near the *** results indicate that the optimum monitoring period for jellyfish outbreaks in Liaodong Bay is from the end of May to the end of July.

关键词： jellyfish Aurelia coerulea Nemopilema nomurai molecular monitoring community

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Identification of dissolved and particulate carbonyl compounds produced by marine harmful algal bloom species

引用

Journal of Oceanology and Limnology 2019年第5期37卷 1566-1581页

作者： SHANG Lixia HU Zhangxi TANG Yingzhong Key Laboratory of marine ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for marine ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Carbonyl compounds, especially polyunsaturated aldehydes (PUAs), are increasingly reported as teratogenic to grazers and deleterious to phytoplankton. While PUAs have been considered to be mainly produced by diatoms after cell wounding, little is known about whether microalgae other than diatoms, particularly harmful algal bloom (HAB)-forming species, produce carbonyl compounds. In this study, we analyzed the carbonyl compounds from eight common HAB-forming species ( Akashiwo sanguinea , Karenia mikimotoi , Karlodinium venefi cum , Margalefi dinium polykrikoides , Prorocentrum donghaiense , P . minimum , Scrippsiella trochoidea , and Heterosigma akashiwo ) using gas chromatography-mass spectrometry in full scan and selected ion monitoring (SIM) modes. Our results show a ubiquitous presence of carbonyl compounds in both dissolved and particulate forms in all species we examined. In the full scan mode, 133 chromatographic peaks were detected from 51 samples altogether. Both the varieties of carbonyl compounds and their quantities were algal species dependent, although most of the carbonyl compounds could not be fully identifi ed according to the mass spectral database only due to the unavailability of enough standards for all analytes. Aided with nine standards in SIM mode, we further identifi ed and quantifi ed all nine aldehydes (2-methyl-2-pentenal, trans-2-nonenal, cis-6-nonenal, 2,6-dimethyl-5-heptenal, trans-2-hexenal, trans-2- decenal, 2,4-heptadienal, trans-trans-2,4-octadienal, and trans-trans-2,4-decadienal). Four of these nine aldehydes were detected in particulate form, which confi rmed that trans-2-nonenal could be produced by K . mikimotoi , Karl . venefi cum , P . donghaiense , P . minimum , S . trochoidea , and H . akashiwo , 2,4-heptadienal and trans-trans-2,4-decadienal by A . sanguinea , M . polykrikoides , and S . trochoidea , and trans, trans-2,4- octadienal by S . trochoidea , respectively. We proved that some dinofl agellate and raphidophyte spe

关键词： aldehyde dinofl agellate harmful algal blooms (HABs) heptadienal octadienal decadienal

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microbial Community Composition and Function in Sediments from the Pearl River Mouth Basin

引用

Journal of Ocean University of China 2020年第4期19卷 941-953页

作者： CHEN Ye MI Tiezhu LIU Yueteng LI Siqi ZHEN Yu College of marine Life Sciences Ocean University of ChinaQingdao 266003China Laboratory for marine ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266071China Key Laboratory of marine Environment and ecology Ministry of EducationQingdao 266100China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China

This study was conducted to characterize the diversity and function of microbial communities in marine sediments of the Pearl River Mouth Basin(PRMB)in the South China *** results showed that the bacterial and archaeal communities varied greatly with *** in bacterial communities and Nitrososphaeria and Woesearchaeota in archaeal communities were dominant in the shallow sediments(1-40 cm),while Chloroflexi in bacterial communities and Bathyarchaeia in archaeal communities were dominant in the deep sediments(50-200 cm).Regarding ecological functions based on the metatranscriptomic data,genes involved in various pathways of nitrogen metabolism and sulfur metabolism were observed in the tested sediment *** analysis revealed that Proteobacteria contribute the most to nearly all genes involved in nitrogen and sulfur ***,Thaumarchaeota contribute the most to certain genes involved in nitrification,denitrification and assimilatory sulfate reduction *** most abundant bacterial genus,Candidatus Scalindua,is crucial for nitrification,dissimilatory nitrate reduction,denitrification and assimilatory sulfate reduction pathways.

关键词： microbial community and function high-throughput sequencing Pearl River Mouth Basin(PRMB)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Dissolved barium as a tracer of Kuroshio incursion in the Kuroshio region east of Taiwan Island and the adjacent East China Sea

引用

Science China Earth Sciences 2017年第7期60卷 1356-1367页

作者： LIU Wei SONG JinMing YUAN HuaMao LI Ning LI XueGang DUAN LiQin Chinese Academy of Sciences Key Laboratory of marine ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China University of Chinese Academy of Sciences Beijing 100049 China Shandong Analysis and Test Center Jinan 250014 China Laboratory for marine ecology and Environmental Sciences Qingdao National Laboratory for Marine science and Technology Qingdao 266237 China

From May to June 2014, the geochemical characteristics of dissolved barium(Ba) in sea water and its influx from the Kuroshio into the East China Sea(ECS) were studied by investigation of the Kuroshio mainstream east of Taiwan Island and the adjacent ECS. This allowed for the scope and extent of the Kuroshio incursion to be quantitatively described for the first time by using Ba as a tracer. The concentration of Ba in the Kuroshio mainstream increased gradually downward from the surface in the range 4.91–19.2 μg L.1. In the surface layer of the ECS, the Ba concentration was highest in coastal water and gradually decreased seaward, while it was higher in coastal and offshore water but lowest in middle shelf for bottom layer. The influx of Ba from Kuroshio into the ECS during May to October was calculated to be 2.19×108 kg by a water exchange model, in which the subsurface layer had the largest portion. The distribution of Ba indicated that Kuroshio upwelled in the sea area northeast of Taiwan Island. The north-flowing water in the Taiwan Strait restrained the incursion of Kuroshio surface water onto the ECS shelf, while Kuroshio subsurface water gradually affected the bottom of the ECS from outside. The results of end member calculation, using Ba as a parameter, showed that the Kuroshio surface water had little impact on the ECS, while the Kuroshio subsurface water formed an intrusion current by climbing northwest along the bottom of the middle shelf from the sea area northeast of Taiwan Island into the Qiantang Estuary, of which the volume of Kuroshio water was nearly 65%. Kuroshio water was the predominant part of the water on the outer shelf bottom and its proportion in areas deeper than the 100 m isobath could reach more than 95%. In the DH9 section(north of Taiwan Island), Kuroshio subsurface water intruded westward along the bottom from the shelf edge and then rose upward(in lower proportion). Kuroshio water accounted for 95% of the ocean volume could reach as f

关键词： Dissolved barium Tracer Geochemical characteristics Kuroshio incursion The ECS shelf

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Characterization of Bacterial Communities in Aerosols over Northern Chinese Marginal Seas and the Northwestern Pacific Ocean in Autumn

引用

Journal of Ocean University of China 2023年第1期22卷 136-150页

作者： ZHANG Bo ZHEN Yu MI Tiezhu QI Jianhua YUAN Gang Key Laboratory of marine Environment and ecology Ministry of EducationOcean University of ChinaQingdao 266100China Laboratory for marine ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China

The characteristics of the bacterial community structure in aerosols of different particle sizes over northern Chinese marginal seas and the northwestern Pacific Ocean in autumn were analyzed using high-throughput sequencing and the quantitative real-time PCR method based on 16S rRNA *** with environmental factors and air mass sources,the bacterial abundance,community diversity,composition and structural characteristics in aerosols were studied,which might provide a scientific evaluation for a comprehensive understanding of the characteristics,long-distance transmission and ecological effects of aerosols from coastal waters to the distant ocean(northwestern Pacific Ocean).At the junction of the South Yellow Sea and the East China Sea,the bacterial abundance in the aerosols was substantially affected by transmission of continental air masses and was higher than those in other samples,and the bacterial abundance in coarse particle(>2.1μm)samples was significantly higher than that in fine particle(0.05).Among the environmental factors examined,a significant negative correlation was observed between bacterial community richness and temperature(P<0.05),and the bacterial community diversity was significantly positively correlated with the concentration of K^(+)(P<0.05).Canonical correspondence analysis showed that temperature,NH_(4)^(+) concentration and SO_(4)^(2−) concentration exerted significant effects on bacterial community struc

关键词： bioaerosol marine environment community structure particle size

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

The phosphorus cycle in the Sanggou Bay

引用

Acta Oceanologica Sinica 2017年第1期36卷 90-100页

作者： XU Wenqi LI Ruihuan LIU Sumei NING Zhiming JIANG Zengjie Key Laboratory of Ministry of Education for marine Chemistry Theory and Technology Ocean University of China/Qingdao Collaborative Innovation Center of Marine Science and Technology Laboratory of marine ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Department of Mariculture ecology and Carrying Capacity Laboratory Yellow Sea Fisheries Research InstituteChinese Academy of Fishery Sciences

The phosphorus cycle is studied during 2013–2014 in the Sanggou Bay（SGB）, which is a typical aquaculture area in northern China. The forms of measured phosphorus include dissolved inorganic phosphorus（DIP）, dissolved organic phosphorus（DOP）, particulate inorganic phosphorus（PIP）, and particulate organic phosphorus（POP）.DIP and PIP are the major forms of total dissolved phosphorus（TDP） and total particulate phosphorus（TPP）,representing 51%–75% and 53%–80%, respectively. The concentrations and distributions of phosphorus forms vary among seasons relative to aquaculture cycles, fluvial input, and hydrodynamic conditions. In autumn the concentration of DIP is significantly higher than in other seasons（P〈0.01）, and higher concentrations are found in the west of the bay. In winter and spring the phosphorus concentrations are higher in the east of the bay than in the west. In summer, the distributions of phosphorus forms are uniform. A preliminary phosphorus budget is developed, and shows that SGB is a net sink of phosphorus. A total of 1.80×10^7 mol/a phosphorus is transported into the bay. The Yellow Sea is the major source of net input of phosphorus（61%）, followed by submarine groundwater discharge（SGD）（27%）, river input（11%）, and atmospheric deposition（1%）. The main phosphorus sink is the harvest of seaweeds（Saccharina japonica and Gracilaria lemaneiformis）, bivalves（Chlamys farreri）,and oysters（Crassostrea gigas）, accounting for a total of 1.12×10^7 mol/a. Burial of phosphorus in sediment is another important sink, accounting for 7.00×10^6 mol/a. Biodeposition by bivalves is the major source of phosphorus in sediment, accounting for 54% of the total.

关键词： phosphorus cycle aquaculture Sanggou Bay

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Observations of turbulent mixing and vertical diff usive salt fl ux in the Changjiang Diluted Water

引用

Journal of Oceanology and Limnology 2022年第4期40卷 1349-1360页

作者： Baisu ZHU Wei YANG Chengfei JIANG Tao WANG Hao WEI School of marine Science and Technology Tianjin UniversityTianjin 300072China Key Laboratory of marine Environment and ecology Ocean University of ChinaQingdao 266100China

Based on microstructure measurements from a repeated sampling station southwest of the Jeju Island during summer,we studied the hydrography,pycnocline turbulence,and vertical salt fl ux in the Changjiang Diluted Water(CDW).The water column was well stratifi ed with the CDW occupied the surface~20 *** of the large turbulent kinetic energy dissipation rate(ε)were found in the bottom boundary ***,intermittent strong turbulence(ε>10^(-6) W/kg)occurred in the pycnocline,which may induce strong mixing events and increase the vertical diff usive salt fl ux at the base of CDW by one order of *** daily-mean vertical diff usive salt fl ux could reach 4.3(2.1,8.9)×10^(-6) m/*** moored velocity measurements and associated wavelet analysis showed the presence of velocity fl uctuations when there was strong pycnocline *** moderate resolution imaging spectroradiometer(MODIS)satellite images further suggest that the velocity fl uctuations are induced by the prevailing internal solitary waves(ISWs)which are mainly generated at the shelf break of the East China Sea or the topographic features surrounding Jeju *** calculated gradient Richardson number denote the occurrence of shear instability in the pycnocline when strong turbulence *** presented results have strong implications for the importance of ISWs in infl uencing the vertical diff usion of CDW and changes in other properties.

关键词： turbulence vertical salt flux internal solitary wave Changjiang River plume

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Application of an integrated methodology for eutrophication assessment:a case study in the Bohai Sea

引用

Chinese Journal of Oceanology and Limnology 2013年第5期31卷 1064-1078页

作者：吴在兴俞志明宋秀贤袁涌铨曹西华梁玉波 Key Laboratory of marine ecology and Environmental Science Institute of OceanologyChinese Academy of Sciences University of Chinese Academy of Sciences National marine Environmental Monitoring Center

An integrated methodology for eutrophication assessment,which integrates both water quality indicators(causative factors) and ecological response indicators(effect factors),is *** is then applied to rank the eutrophication status of the years 2007 and 2008 in the southwest Bohai *** assessment model identified that north Bohai Bay and west Laizhou Bay were the two areas with the most serious eutrophication problems in the southwest Bohai *** addition,compared to that in the west Laizhou Bay,the eutrophication conditions in the north Bohai Bay was more serious in both *** problems such as harmful algal blooms(HABs) and low dissolved oxygen(DO) events in north Bohai Bay were *** integrated method outmatched the currently used Chinese nutrient index method by definitely identifying areas with the most serious eutrophication problems,while the nutrient index method gave ambiguous results between the two *** of both causative factors and effect factors,combining concentration,spatial coverage and frequency of indicators,as well as use of multi-season monitoring datasets in the methodology result in a more accurate,representative and useful assessment.

关键词： eutrophication assessment Bohai Sea water quality ecological response

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Impact of Kuroshio on the dissolved oxygen in the East China Sea region

引用

Journal of Oceanology and Limnology 2019年第2期37卷 513-524页

作者： ZUO Jiulong SONG Jinming YUAN Huamao LI Xuegang LI Ning DUAN Liqin Key Laboratory of marine ecology and Environmental Sciences Institute of OceanologyChinese Academy of Sciences University of Chinese Academy of Sciences Laboratory for marine ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Center for Ocean Mega-Science Chinese Academy of Sciences Ocean College Hebei Agricultural University

A marine survey was conducted from 18 May to 13 June 2014 in the East China Sea (ECS) and its adjacent Kuroshio Current to examine the spatial distribution and biogeochemical characteristics of dissolved oxygen (DO) in spring. Waters were sampled at 10?25 m intervals within 100 m depth, and at 25?500 m beyond 100 m. The depth, temperature, salinity, and density (sigma- t ) were measured in situ with a conductivity-temperature-depth (CTD) sensor. DO concentrations were determined on board using traditional Winkler titration method. The results show that in the Kuroshio Current, DO content was the highest in the euphotic layer, then decreased sharply with depth to about 1 000 m, and increased with depth gradually thereafter. While in the ECS continental shelf area, DO content had high values in the coastal surface water and low values in the near-bottom water. In addition, a low-DO zone off the Changjiang (Yangtze) River estuary was found in spring 2014, and it was formed under the combined influence of many factors, including water stratification, high primary productivity in the euphotic layers, high accumulation/ sedimentation of organic matter below the euphotic layers, and mixing/transport of oceanic current waters on the shelf. Most notable among these is the Kuroshio intruded water, an oceanic current water which carried rich dissolved oxygen onto the continental shelf and alleviated the oxygen deficit phenomenon in the ECS, could impact the position, range, and intensity, thus the formation/destruction of the ECS Hypoxia Zone.

关键词： dissolved oxygen hypoxia Kuroshio intrusion East China Sea

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：