巢湖浮游动物功能群和浮游植物的相互关系

为研究巢湖浮游动物功能群和浮游植物的相互关系,于2019a7月对巢湖浮游动物和浮游植物进行了调查采样,划分了浮游动物功能类群,并系统分析了浮游动物功能群和浮游植物的组成特征.结果表明:浮游植物6门45种,其中硅藻门9种、金藻门1种、蓝藻门8种、裸藻门5种、绿藻门19种、隐藻门3种,蓝藻门是巢湖浮游植物主要组成部分,优势种群主要为螺旋鱼腥藻、微囊藻、固氮鱼腥藻、柱胞藻;绿藻门优势种群主要为小球藻,隐藻门优势种主要为尖尾蓝隐藻.浮游动物为44种,其中轮虫23种,原生动物11种,枝角类6种,桡足类4种.巢湖浮游动物共分为11个功能群,站V、站I、站VII、站VIII、站VI的P A/P B密度最高,站IV的SCF密度最高,站Ⅱ、站III、站V、站VI的RF密度较高.8个样点SCF的生物量均为最高,站Ⅱ、站III、站V、站VI的RF生物量也较高.浮游动物功能群和环境因子的冗余分析(RDA)表明,蓝藻、绿藻、螺旋鱼腥藻、微囊藻、固氮鱼腥藻和小球藻6个类群密度是与巢湖浮游动物功能群相关性较强的环境因子,且影响浮游动物各功能类群的环境因子存在差异.     

天津七里海湿地浮游生物群落结构及多样性分析

2012年5月、7月、9月采取现场调查和采样监测的方法对七里海湿地浮游生物种类、密度和生物量变化动态以及多样性进行了研究。结果表明:该湿地共有浮游植物6门44种,其中蓝藻门11种,绿藻门18种,硅藻门8种,裸藻门4种,甲藻门1种,隐藻门2种。浮游动物13属22种,其中桡足类4属4种,枝角类2属2种,轮虫7属16种。浮游植物的密度和生物量表现为9月7月5月,而浮游动物的密度和生物量表现为5月9月7月。5月、7月、9月湿地浮游植物种类均较丰富;5月湿地浮游动物种类贫乏,7月、9月浮游动物种类一般。这一结果可能与湿地水质污染导致水体富营养化现象有关,水体富营养化程度也表现为5月7月9月。     

吉林省兴隆水库浮游植物群落结构特征及其与环境因子的关系

通过对不同季节浮游植物种类和数量以及水质理化指标的调查,分析了吉林省兴隆水库浮游植物群落的动态变化规律,探讨了浮游植物生长与环境因子的关系.结果表明:兴隆水库共有171种浮游植物,隶属于6门86属.其中,硅藻门22属42种,甲藻门4属6种,裸藻门6属18种,绿藻门41属83种,隐藻门1属2种.优势种共有8种,5月份优势种主要为绿藻门,7月份优势种均属蓝藻门,9月份绿藻门和蓝藻门各占一半.浮游植物细胞密度5月份平均值为9.83×10~6个/L,7月份平均值为78.73×10~6个/L,9月份平均值为119.51×10~6个/L,季节差异显著.多样性分析表明兴隆水库浮游植物的物种组成较丰富,Shannon-Wiener多样性指数较高,群落结构稳定性较强;相关性分析表明影响浮游植物生长的主要营养盐因子为铵态氮、亚硝酸盐氮、总氮.     

南昌市青山湖浮游植物群落结构的分析

2015年7月、10月和2016年1月、4月通过对青山湖浮游藻类群落结构及水体污染状况进行调查,鉴定出浮游植物有7门73属112种,其中绿藻门最多,共计33属56种,占总种数的50%.浮游植物细胞密度为3.40×108~7.26×108cells·L-1,以蓝藻为主;浮游植物平均生物量为8.105 mg·L-1,以硅藻和绿藻为主;细胞密度优势种为假鱼腥藻、细小平裂藻、美丽星杆藻、二尾栅藻、极小单针藻,生物量优势种包括颗粒直链藻极狭变种、新星形冠盘藻、栅藻、卵囊藻.利用Shannon-Wiener多样性指数、Pielou均匀度指数、Margalef指数及丰富度指数(S)与水体的理化性质相结合对水质作出了评价,结果显示青山湖水质处于中度污染状态.     

上海市鲁迅公园浮游植物群落结构分析及评价

为揭示鲁迅公园湖泊水体浮游植物的群落结构特征和水体健康状态,于2019年1—10月对鲁迅公园湖泊水体进行了生态学调查,分析了浮游植物的群落组成、密度、生物量、多样性、均匀度及优势种.共鉴定出浮游植物8门83属,其中蓝藻门、绿藻门和硅藻门物种数量最多,全年平均细胞密度为14.17×10⁶ ind/L,全年平均生物量为3.57 mg/L,平均细胞密度和生物量都随着季度变化而增加;优势门类为蓝藻门、绿藻门和硅藻门,主要代表属有伪鱼腥藻、平裂藻、栅藻、小环藻.采用冗余分析对鲁迅公园湖泊水体中的环境因子与浮游植物之间的关系进行了进一步解析,结果表明, pH值、硝态氮、亚硝氮和高锰酸盐指数是影响浮游植物群落结构的关键影响因子.     

佛子岭水库浮游生物特征及水质评价

2009年1月-2009年12月在对佛子岭水库进行水质理化监测的同时．对水库5个站点进行浮游生物群落生态调查。佛子岭水库共检出浮游藻类8门221种,以绿藻门、硅藻门和蓝藻门为主;检出浮游动物83种,以原生动物和轮虫为主。水质生物监测评价结果表明,佛子岭水库受到轻一中度污染,水质等级为II类,属中营养型水体。     

滴水湖浮游植物群落结构特征及对其水质评价

通过2009年1、4、7、10月对滴水湖浮游植物进行4次调查采样,研究滴水湖浮游植物群落结构特征,评价滴水湖水质现状.共鉴定浮游植物96种,隶属于8门48属.其中绿藻门种类居首位,有21属51种;其次为硅藻门11属20种;蓝藻门8属16种;隐藻门2属3种;裸藻门2属2种;金藻门2属2种;甲藻门1属1种;黄藻门1属1种.平均数量生物量是2054.28×104个/L,其中绿藻比例最高,占总量的41%;其次是硅藻,占总量的30.5%;蓝藻第三,占总量的16.5%;其他藻类所占比例较小.根据浮游植物群落结构并结合部分理化指标对湖区进行水质评价,结果显示滴水湖水质属于中-富营养.     

广州李坑垃圾场渗滤液中的藻类群落结构特征

对广州李坑生活垃圾填埋场渗滤液池的藻类群落结构进行为期1 a的调查。共发现藻类20种,分别归蓝藻门、绿藻门和硅藻门。其中,优势种类是蓝藻门中的席藻Phorm idium spp.。渗滤液中藻类数量和生物量的年平均值分别为13.47×108ind.L-1和144.70 m.gL-1。藻类生物量的年动态表现为冬春高、夏秋低,生物量最高的2月份达352.81 mg.L-1,最小的8月为20.50 m.gL-1。渗滤液中藻类群落的Shannon-W iever多样性指数的年变化类似于群落生物量的格局。渗滤液藻类生物量、群落多样性和优势种席藻的生物量与月平均温度、月雨量和NH+4-N呈负相关关系,而与COD、NO3--N、TP、O rtho-P呈正相关关系。     

低盐虾塘浮游生物群落及摄食研究

2017年5月5日,于福建厦门杏林浦林村对4口处于不同养殖阶段的凡纳滨对虾(Litopenaeus vannamei)低盐虾塘进行了浮游生物群落调查,并运用"稀释法"研究了微型浮游动物对浮游植物的摄食压力。结果表明,在养殖过程中,浮游植物群落从以绿藻和硅藻为主,逐渐转变为以丝状蓝藻为主的类型,绿藻优势种主要有二形栅藻(Scenedesmu dimorphus)、波吉卵囊藻(Oocystis borgei)和纤维藻(Ankistrodesmus spp.),蓝藻优势种主要为伪鱼腥藻(Pseudanabaena sp.)、鞘丝藻(Planktolyngbya sp.)、弱细颤藻(Oscillatoria tenuis)和微小平裂藻(Merismopedia tenuissima)。微型浮游动物主要为原生动物和轮虫,其中原生动物以旋急游虫(Strombidium spiralis)和单环栉毛虫(Didinium balbianii)为普遍的优势种类,轮虫主要有前额犀轮虫(Hinoglena frontalis)和壶状臂尾轮虫(Rachionus urceus)。微型浮游动物对浮游植物的摄食率为0.55~0.85/d,浮游植物的生长率为1.42~3.16/d。微型浮游动物对浮游植物现存量的摄食压力为42.31%~57.26%,对浮游植物初级生产力的摄食压力为46.39%~59.80%,显示微型浮游动物在虾塘能量流动和物质循环方面起着重要的作用。     

天台县典型水体浮游生物群落结构特征及其与环境因子的关系

为探明不同水体类型浮游生物群落结构特征及其与水环境因子的关系,对天台县3种典型水体的环境因子和浮游生物进行了季节性调查和监测.调查结果表明,天台县3种水体共鉴定出浮游植物7门181种,以绿藻门为主(>50%),夏秋季的优势种主要为绿藻和硅藻,而冬春季则以硅藻和绿藻为主.梅尼小环藻(Cyclotella meneghiniana)、伪鱼腥藻(Pseudoanabaena sp.)、变异直链藻(Melosira islandica)、最细丝藻(Ulothrix tenuissima)和微小隐球藻(Aphanocapsa delicatissima)为常年优势种.天台县3种典型水体共鉴定出浮游动物107种,从高到低依次为原生动物(52种)、轮虫(39种)、枝角类(11种)和桡足类(5种).浮游动物种类呈现夏秋季多,冬春季少的变化特征.冗余分析(RDA)分析表明,pH、溶解氧、化学需氧量和叶绿素a等是影响天台县3种典型水体浮游生物的主要环境因子.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with