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Two drifting paths of Sargassum bloom in the Yellow Sea and East China Sea during 2019-2020

Acta Oceanologica Sinica 2022年第6期41卷 78-87页

作者： Chao Yuan Jie Xiao Xuelei Zhang mingzhu fu Zongling Wang The MNR Key Laboratory of Marine Eco-Environmental Science and Technology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory of Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China National Engineering Laboratory for Integrated Aero-Space-Ground-Ocean Big Data Application Technology Xi'an 710129China

The macroalgal blooms of floating brown algae Sargassum horneri are increasing in the Yellow Sea and East China Sea during the past few years.However,the annual pattern of Sargassum bloom is not well characterized.To study the developing pattern and explore the impacts from hydro-meteorologic environment,high resolution satellite imageries were used to monitor the distribution,coverage and drifting of the pelagic Sargassum rafts in the Yellow Sea and East China Sea from September 2019 to August 2020.Sargassum blooms were detected from October 2019 to June 2020 and presented two successive drifting paths that both initiated from around 37°N.The first path spanned smaller spatial scale and shorter period,starting with a bloom of 3 km^(2) distribution area near the eastern tip of Shandong Peninsula in late October 2019 and drifted southwards,hit the Pyropia aquaculture area in early January 2020,then vanished in the northwest of East China Sea(ca.32°N)around end of January.The second path began with a large distribution area of 23000 km^(2) east of 123°E in late January 2020,firstly moved southwards in the central Yellow Sea and northern East China Sea(north of 29°N)till late April,then turned northwards with monsoon wind and vanished from late June to August.The mean sea surface temperature of 8℃ to 20℃ in the Sargassum bloom areas corresponded to in situ observed temperature range for vegetative growth and floating of S.horneri.There was no observed floating Sargassum blooms during July through September in the Yellow Sea and East China Sea.The results indicate that floating S.horneri is unable to complete life cycle in the Yellow Sea and East China Sea,and provide insights to the future management of Sargassum blooms.further studies are needed to validate the pattern and source of annual Sargassum bloom in the Yellow Sea and East China Sea.

关键词： Sargassum horneri macroalgal bloom high resolution remote sensing wind directions sea surface temperature Yellow Sea and East China Sea

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Population differentiation in the dominant species(Ulva prolifera)of green tide in coastal waters of China

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Acta Oceanologica Sinica 2022年第11期41卷 108-114页

作者： Hongbin Han Yan Li Xiaojun Ma Wei Song Zongling Wang mingzhu fu Xuelei Zhang Key Laboratory of Marine Eco-Environmental Science and Technology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory of Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

Since 2015,green tides with Ulva prolifera as the dominant species in the Qinhuangdao coastal waters have continued to occur.In this study,the relationship between green tides in Qinhuangdao and the Yellow Sea(setting sites in Rudong and Qingdao)was evaluated by genetic analyses of U.prolifera.Single nucleotide polymorphism(SNP)markers were used to analyze genetic diversity and genetic relationships among groups.Genetic differentiation was lower among floating U.prolifera populations in Rudong and Qingdao than in Qinhuangdao.The floating U.prolifera population had higher genetic diversity and polymorphism levels in Qingdao and Rudong than in Qinhuangdao.Physiological experiments showed that the growth rate and net buoyancy of floating U.prolifera were highest in Qinhuangdao and Qingdao,respectively,under the same environmental conditions(temperature and light).Overall,these findings showed that U.prolifera populations in the Qinhuangdao and Yellow Sea green tides(Rudong and Qingdao)differ significantly at the molecular and physiological levels.Therefore,the Qinhuangdao green tide is not correlated with the Yellow Sea green tide and has a different origin and development mode.This study provides insight into the mechanism underlying green tide blooms in coastal waters of China.

关键词： Ulva prolifera green tide dominant species population differentiation Qinhuangdao

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The distribution of phytoplankton size and major influencing factors in the surface waters near the northern end of the Antarctic Peninsula

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Acta Oceanologica Sinica 2021年第6期40卷 92-99页

作者： Lu Liu mingzhu fu Kaiming Sun Qinzeng Xu Zongjun Xu Xuelei Zhang Zongling Wang College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Eco-environmental Science and Technology of Ministry of Natural Resources First Institute of OceanographyQingdao 266061China Pilot National Laboratory for Marine Science and Technology(Qingdao) Qingdao 266237China

The waters near the Antarctic Peninsula have always been a study hot spot because of their variable and unique oceanographic conditions.To determine the distribution and possible influencing factors on phytoplankton size and abundance near the Antarctic Peninsula,a large-scale survey was conducted during the austral summer of2018.Samples were collected in 27 stations located in the Drake Passage(DP),South Shetland Islands(SSI),and South Orkney Islands(SOI).Phytoplankton communities were described using chlorophyll a(Chl a),flow cytometry and light microscopy to cover a size range from pico-to microphytoplankton.Nanophytoplankton,especially small nanophytoplankton(2-6μm)with abundance ranging from 0.66×10^(3) cells/mL to 8.46×10^(3) cells/mL,was predominant throughout the study area.Among different regions,there was an obvious size shift.The proportion of picophytoplankton near the Elephant Island(EI)and DP was higher than other regions,and larger cells were found mainly in east of SOI.The distribution of phytoplankton abundance detected by flow cytometry was not completely consistent with Chl a concentrations due to the contribution of larger cells to Chl a.Possible influencing factors on the phytoplankton size distribution were discussed.The properties of water masses such as temperature and salinity can influence the phytoplankton size distribution.Correlation analysis revealed that only picophytoplankton is significantly correlated with salinity.Light and Fe availability might affect phytoplankton abundance and size distribution especially near the waters of SSI and EI in this study.It was also speculated that the abundance of cryptophytes is possibly related to ice melting.

关键词： Antarctic Peninsula phytoplankton size flow cytometry Chl a microscopy

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Spatiotemporal variability of physical-biogeochemical processes and intrinsic correlations in the semi-enclosed South Yellow Sea

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Acta Oceanologica Sinica 2020年第10期39卷 11-26页

作者： Qinsheng Wei Baodong Wang mingzhu fu Junchuan Sun Qingzhen Yao Ming Xin Zhigang Yu First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Frontiers Science Center for Deep Ocean Multispheres and Earth System Ministry of EducationOcean University of ChinaQingdao 266100China Laboratory for Regional Oceanography and Numerical Modeling Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

Investigating the spatiotemporal variability of biogeochemical processes and ecological responses under multiple physical controls in shelf seas is of great importance for obtaining an in-depth understanding of marine ecosystem.Based on a compiled data set of historical observations and remote sensing data,the spatiotemporal variability and heterogeneity of physical-biogeochemical processes in the semi-enclosed South Yellow Sea(SYS)are investigated,and the intrinsic connectivity among different subregions and the associated mechanisms are examined.The results show that the seasonal alternation between southward transport in cold seasons and upwelling-induced vertical delivery in warm seasons is the primary physical control of the biogeochemical processes and primary production off Shidao and in the area adjacent to the Haizhou Bay.The northeastward expansion of coastal waters in the Subei Shoal constitutes an important physical driver for the offshore transport of Ulva prolifera in summer.Stratification significantly affects the biogeochemical processes in the Yellow Sea Cold Water Mass(YSCWM)-dominated area during warm seasons,and nutrients can accumulate in bottom waters from spring to autumn,making the Yellow Sea Cold Water Mass(YSCWM)be an important nutrient pool.Upwelling around the YSCWM boundary in the stratified season leads to consistency among the high chlorophyll a(Chl a)area,high primary productivity region and low-temperature upwelling zone.During cold seasons,the interactions of the southward cold waters in the western nearshore area and the northward warm waters in the central region lead to an“S”-shaped front in the SYS.In summer,upwelling can extract nutrients from the YSCWM;thus,the biogeochemical-ecological processes inside the cold-water mass and in the frontal zone are well connected via upwelling,and three typical physical-biogeochemical coupling regions are generated,namely,the Shidao coast,the area beyond the Haizhou Bay and the area off the Subei Shoal.This work refines and integrates stu

关键词： physical-biogeochemical process upwelling front Yellow Sea Cold Water Mass South Yellow Sea

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基于自适应虚拟电阻的低压微电网有功均分下垂控制策略

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电机与控制学报 2024年第5期28卷 142-153页

作者：范必双付思维王文李启凯刘铮唐明珠长沙理工大学电气与信息工程学院湖南长沙410114 长沙理工大学电网防灾减灾全国重点实验室湖南长沙410114

由于低压微电网中各分布式电源的线路阻抗不匹配,传统的下垂控制策略难以按照下垂系数合理分配有功功率。为此,提出一种无需通信的自适应虚拟电阻下垂控制方法。通过将微电网中每个分布式发电机(DG)单元输出的有功功率和电压传送给自适... 详细信息

由于低压微电网中各分布式电源的线路阻抗不匹配,传统的下垂控制策略难以按照下垂系数合理分配有功功率。为此,提出一种无需通信的自适应虚拟电阻下垂控制方法。通过将微电网中每个分布式发电机(DG)单元输出的有功功率和电压传送给自适应虚拟电阻控制器中,在保证电压和频率稳定控制的前提下实现功率按逆变器容量比例进行精确分配。论文对改进方法的微电网逆变器进行小信号稳定性分析,以优化控制器有关控制参数。仿真和实验结果验证了所提控制方法的有效性。

关键词：微电网分布式发电下垂控制自适应虚拟电阻有功功率分配环流抑制小信号模型

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Physical-biogeochemical interactions and potential effects on phytoplankton and Ulva prolifera in the coastal waters off Qingdao(Yellow Sea, China)

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Acta Oceanologica Sinica 2019年第2期38卷 11-23页

作者： Qinsheng Wei Baodong Wang Qingzhen Yao Zhigang Yu mingzhu fu Junchuan Sun Bochao Xu Linping Xie Ming Xin First Institute of Oceanography Ministry of Natural Resources Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology (Qingdao) Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education Ocean University of China

In recent years, the spectacular massive green tide of Ulva prolifera has become a recurrent phenomenon appearing every summer in the coastal waters off Qingdao(Yellow Sea, China), attracting the attention of scientists and local government. Based on multidisciplinary data collected during summer and winter, this study focuses on the hydrological characteristics and regional biogeochemical processes in coastal waters off Qingdao.The results show that the boundary of the Yellow Sea Cold Water Mass(YSCWM) can reach the Qingdao coastal region in summer and is locally raised to the upper layers to form coastal upwelling beyond tidal mixing and favorable wind. The regional summer upwelling off the Qingdao coast effectively enriches the nutrient concentrations in the upper water column and thus promotes growth of phytoplankton but reduces the dissolved oxygen(DO) concentration and pH value in the bottom. The regional summer upwelling off Qingdao coast may facilitate the growth and regional blooming of the U. prolifera that migrate to this region with the southerly wind.Additionally, the effects of the front on the aggregation of U. prolifera may be significant. In winter, the Yellow Sea Warm Current(YSWC) extends and spreads along the offshore region off the Subei Shoal towards the Qingdao coastal sea. This tongue-shaped warm water meets the cold coastal water off Qingdao, which leads to the formation of a physical front. As a consequence, remarkable fronts of nutrient and chlorophyll a(Chl a) also form between the shoreward warm water and the cold coastal water. This study increases the understanding of the interactions between the regional physical, chemical, and biological processes off the Qingdao coast.

关键词： biogeochemical process upwelling front Ulva prolifera Qingdao coast southern Yellow Sea

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Decadal characteristics of the floating Ulva and Sargassum in the Subei Shoal,Yellow Sea

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Acta Oceanologica Sinica 2020年第10期39卷 1-10页

作者： Jie Xiao Shiliang Fan Zongling Wang mingzhu fu Hongjun Song Xiao Wang Chao Yuan Min Pang Xiaoxiang Miao Xuelei Zhang Key Laboratory of Marine Eco-Environmental Science and Technology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory of 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 data of field surveys during 2009 to 2018 was analyzed to understand the seasonality and inter-annual variability of the floating Ulva and Sargassum in the Subei Shoal,the southwestern Yellow Sea of China on decadal scale.The floating Ulva biomass was consistently originated from the central region of the Subei Shoal in middle to late April,increased rapidly,drifted and extended into the offshore water in May and June.The average floating Ulva biomass in the shoal generally increased over the years with evident inter-annual fluctuations.In contrast,pelagic Sargassum was accumulated in the Subei Shoal and formed the spring bloom only in 2013,2017 and 2018,and the biomass was higher than the co-occurring Ulva during the survey in these three years.Compared to the raft-origin floating Ulva,genesis and development of the pelagic Sargassum was distinct.Based on the current research,the Sargassum biomass was exotic and often initiated in the offshore water in March,and intruded into the shoal in April and May.The analysis on the environmental parameters was inconclusive since multiple anthropogenic and non-indigenous factors could influence the green tides in this region.further research covering both the East China Sea and the Yellow Sea is needed to trace the origin of the floating Sargassum and to understand the interactions between these two co-occurring seaweeds.

关键词： seaweed bloom green tide golden tide Ulva Sargassum Yellow Sea

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基于稀疏表示的激光光斑复原方法

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应用光学 2024年第3期45卷 543-548页

作者：黄明柱富容国于祥吕行马凌芸张华楠王鹏南京理工大学电子工程与光电技术学院江苏南京210094 江苏曙光光电仪器公司江苏扬州225000

使用探测器阵列对远场激光光斑分布进行测量,是目前评价激光大气传输特性以及激光发射系统性能的重要方法。利用阵列探测器对高能激光系统性能进行评估,需要准确复原探测器测量所得的激光远场光斑。介绍了一种基于字典学习的阵列探测器... 详细信息

使用探测器阵列对远场激光光斑分布进行测量,是目前评价激光大气传输特性以及激光发射系统性能的重要方法。利用阵列探测器对高能激光系统性能进行评估,需要准确复原探测器测量所得的激光远场光斑。介绍了一种基于字典学习的阵列探测器激光光斑复原方法。首先利用改进后的线性插值算法对原始低采样光斑进行插值,其次介绍了K-SVD(K-singular value decomposition)字典学习算法,将所提方法运用到插值后的图像复原中。此外,用峰值信噪比(peak signal-to-noise ratio,PSNR)和光斑质心偏移量对复原图像进行量化对比。该算法复原的图像PSNR比传统算法高出4 dB~5 dB,光斑质心偏差量在x轴和y轴方向与传统算法相比分别降低了14.7%和12.2%。实验结果表明,所提方法在视觉和量化指标上都取得了良好的光斑图像复原效果。

关键词：探测器阵列激光光斑字典学习光斑复原方法

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福建省被子植物分布新记录

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热带作物学报 2024年第5期45卷 902-905页

作者：马良陈新艳付厚华柳明珠陈文伟陈世品福建卫生职业技术学院福建福州350101 三明市园林中心福建三明365000 福建农林大学林学院福建福州350002 福建戴云山国家级自然保护区福建德化362500

福建省山地众多,地貌特殊,植物多样性高,虽进行了大量的调查工作,但尚未完全摸清整个福建省植物多样性状况。本研究在福建省本土野生植物调查过程中,发现4种被子植物,通过标本采集、鉴定以及查阅相关文献,分别为血红肉果兰(Cyrtosia sep... 详细信息

福建省山地众多,地貌特殊,植物多样性高,虽进行了大量的调查工作,但尚未完全摸清整个福建省植物多样性状况。本研究在福建省本土野生植物调查过程中,发现4种被子植物,通过标本采集、鉴定以及查阅相关文献,分别为血红肉果兰(Cyrtosia septentrionalis)、菱唇蛤兰(Conchidium rhomboidale)、长萼栝楼(Trichosanthes laceribractea)、桦叶荚蒾(Viburnum betulifolium),均为福建省新记录种,肉果兰属(Cyrtosia)为福建省新记录属。对4种植物进行简要的形态特征描述和提供相应的特征照片,并与福建省原有相近种的形态特征区别点进行分析。4种被子植物新记录的发现丰富了福建省植物多样性,为福建省植物多样性保护与利用提供了新资料。凭证标本现存于福建农林大学标本馆(FJFC)。

关键词：福建省被子植物新记录

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基于中医问诊信息的上海地区肥胖高血压的中医证候分类模型

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世界科学技术-中医药现代化 2024年第2期26卷 453-461页

作者：侯春蕾芦波桂明泰姚磊周训杰李建华王明珠符德玉上海中医药大学附属岳阳中西医结合医院上海200437

目的肥胖高血压证候识别模型相关研究较少,本研究基于隐结构模型分析上海地区肥胖高血压中医证候特点,为临床辨证提供依据。方法本研究收集427例上海地区肥胖高血压患者的中医问诊信息,结合频数分析及专家意见,筛选主要症状,采用双重爬... 详细信息

目的肥胖高血压证候识别模型相关研究较少,本研究基于隐结构模型分析上海地区肥胖高血压中医证候特点,为临床辨证提供依据。方法本研究收集427例上海地区肥胖高血压患者的中医问诊信息,结合频数分析及专家意见,筛选主要症状,采用双重爬山法,以Lantern 5.0软件构建肥胖高血压中医问诊信息隐结构模型,对隐变量进行综合聚类分析,分析肥胖高血压中医证候分布,建立证候分类模型。结果427例上海地区肥胖高血压患者的中医问诊信息中,出现最多的5种症状为眩晕(79.3%)、口干口渴(61.2%)、心悸怔忡(60.0%)、急躁易怒(56.9%)、头痛(54.0%),30个显变量构建隐结构模型,得到6个隐变量Y0、Y1、Y2、Y3、Y4、Y5。结论上海地区肥胖高血压患者的临床证候虚实夹杂,基于隐结构模型将该病主要证候分为肝阳上亢证、阴阳两虚证、心肾阴虚证,痰浊、血瘀为肥胖高血压重要的病理因素。隐结构模型对肥胖高血压证候分析的结果与该病的中医临床特点基本吻合,可以反映其主要病因病机。

关键词：原发性高血压肥胖隐结构模型中医证候客观化

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