种群比较

词组短语

group comparison

与种群比较相关的网络例句 [注：此内容来源于网络，仅供参考]

The basal diameter, height of aerial stem, leaf length at middle stem, leaf width at middle stem, internode length at middle stem, internodes number and panicle length of 30 plants from every population were recorded. The statistics of morphological characters showed that the distribution trends of the averages of morphological characters are similar among populations. However, the coefficients of variation within population of 7 morphological characters were very different. The CV of internodes was largest and the CV of height was smallest within population. F-statistics showed that the differences of all morphological characters among populations were significant (P.01). But the differences among populations were different between different groups. The cluster analysis proved that all populations could be divided into three types: salty reed, freshwater reed and giant reed.

对来自每个种群的30个个体的基径、株高、中部叶长、中部叶宽、中部节间长、节间数、穗长7个形态特征的统计分析表明：各形态特征平均值在种群间的分布趋势相似，但变化幅度不同，株高、叶长等营养特征变化较大大，生殖特征穗长的变化较小；7个形态指标在种群内的平均变异度从大到小依次为中部节间长、中部叶宽、穗长、中部叶长、基径、节间数、株高，种群内的平均形态变异度与生境异质性有关；7个形态指标在种群间均差异显著，但多重比较分析显示显著差异主要存在于BZH、淡水生境种群和盐渍化生境种群之间，在相似生境种群间的形态差异不显著；以形态特征为依据的聚类分析支持将15个种群分为三类：盐生芦苇、淡水芦苇和巨型芦苇。

Analysis of grey models between the environmental essential parameters of seawater and the growth of Prorocentrum sigmoides Bohm in Dapeng Bay,South China Sea;2. The relations between the growth of Noctiluca scintillans, Prorocentrum sigmoides Bohm ,zooplankton and physical,chemical factors of seawater were studied in this paper.

研究大鹏湾夜光藻、反曲原甲藻、浮游动物种群增殖与浮游动物和海水理化因子之间的关系，采用的方法是根据它们的种群增殖态势与浮游动物和理化因子的比较，依据空间理论的数学基础，按照规范性、偶对称性、整体性和接近性这四条原则，确定参考数列（母序列：夜光藻和反曲原甲藻、浮游动物）和若干比较数列（子序列：浮游动物和海水理化因子）之间的关联度。

The Markov forecast model, time series method (triple exponential smoothing method and a combined of triple exponential smoothing method and Markov model) and stepwise regression forecast method were choosed, and the basic principles and processes of the three models were analyzed and compared. Based on above, the three methods were used to predict population dynamic of Cricetulus barabansis and Meriones unguiculatus. The characteristic, accuracy and applicability of three methods were analysed and compared. The results showed that,(1) Markov model belongs to a middle-long time forecast model, and the result was interval forecast, but it reached the requirement of forecasting the harmful population dynamic of rodents. Through the forecasted population dynamic of Cricetulus barabansis and Meriones unguiculatus in 2004, the results were accurate; this meant that Markov model was a good forecast model to Cricetulus barabansis and Meriones unguiculatus population.

选择马尔可夫链预测模型、时间序列分析法(三次指数平滑法、三次指数平滑法和马尔可夫链预测模型的组合预测法)和逐步回归预测法，对这三种模型的基本原理、模型的构建过程进行对比分析，在此基础上用此三种方法预测了黑线仓鼠和长爪沙鼠的种群数量，并对三种方法的特点、预测的准确度和适用范围进行了比较分析，结果表明：(1)马尔可夫链预测模型属于中长期预测，预测的结果为区间预测，但对于害鼠种群数量的预测来说已经达到要求，通过对2004年黑线仓鼠和长爪沙鼠种群数量的预测，预测的结果都比较准确，这说明对于预测黑线仓鼠和长爪沙鼠种群的数量动态，马尔可夫链模型是比较好的模型。

The biological characteristics and parameters for different geographic populations of Anastatus japonicus Ashmead in the eggs of Antherea pernyi were compared with the method of life table. The results show that the fecundity properties parameters of Vietnamese population including the net reproduction rate (R0), intrinsic rate of increase, finite rate of increase, doubling time, number of eggs laid per female, preoviposition period and oviposition period are superior to Guangxi, Guangdong and Hainan population.

应用生命表技术对荔蝽平腹小蜂Anastatus japonicus Ashmead不同地理种群以柞蚕卵为繁殖寄主的条件下的重要生物学指标和参数进行测定和比较，结果表明，越南种群的主要生殖力指标，包括净生殖力（R0）、内禀增长率、周限增长率、种群倍增时间、单雌产卵量、产卵前期和产卵历期均比广西、广东和海南种群的理想；4种群的雌蜂寿命、羽化率和雌性比率则没有显著差异。

The results showed that: 1 The survival curve of the population conformed to the type of Deevey-Ⅲ; 2 With an increase in the population mortality ratio and a decrease in the survival rate, the mortality ratio greatly increased in ages 0-40 years, reaching 89.7%; 3 There existed two peaks of mortality in the lifespan, one was from seedlings to young trees (0-40 years) and the other in the adult stage (180 years).

结果表明：1岷江上游林线地段岷江冷杉种群存活曲线趋於Deevey-Ⅲ型。2林线地段岷江冷杉种群生存率呈单调下降趋势，生存率下降趋势前期高於后期，说明岷江冷杉种群幼苗死亡率高，种群后期比较稳定。3林线地段岷江冷杉林整个生长期中出现了两个死亡高峰期，一个出现在幼苗向幼树过渡时期（0~40年），另一个出现在中龄时期（180年）。

Based upon the ecoanatomical method, leaf anatomical characters of eleven populations of six evergreen species (Cyclobalanopsis glauca, C. myrsinaefolia, C. gracilis, Castanopsis sclerophylla, C. eyrei and Lithocarpus glaber) from the eastern subtropical area of China were analyzed and compared with SPSS, DCA and TWINSPAN. The results are: 1. Although the leaf structures of the eleven populations still belong to the mesophyll type, they all express the trend of xerophilization. 2. There are some differences in leaf anatomical characters among populations, species and genera, which occur as the results of their adaptation to different habitats. 3. Different leaf anatomical characters have different variations among populations, species and genera, of which leaf thickness and palisade tissue thickness (considered as ecological adaptation characters) have greater variation than sponge tissue thickness, lower cuticle thickness and lower epidermis thickness (as systematical evolution characters). 4. The leaves of C. sclerophylla and C. glauca with thicker lamina, palisade tissue and cuticle (a multilayered upper epidermis in C. sclerophylla) are thought to better adapt to their dry habitat. The leaves of C. eyrei with thicker sponge tissue, although characterized by a multlayered upper epidermis, adapt to their humid and warm habitat. The leaves of C. myrsinaefolia and C. gracilis characterized by a thinner lamina, a less palisade tissue and a moderate cuticle thickness adapt to the humid and cool habitat in a middle mountain.

选取亚热带东部替代分布明显的壳斗科6种常绿树种（青冈、小叶青冈、细叶青冈、苦槠、甜槠和石栎）的11个种群叶片进行生态解剖，并用SPSS， DCA和TWINSPAN比较分析，结果表明：①尽管6种11个种群叶的结构仍属中生叶型，但有着不同程度的趋旱适应；②叶的解剖性状在属间、种间和种群间均存在着不同程度的差异，这是它们适应各自生境的结果，青冈和石栎的种内差异较大，反映出它们对环境变化有较强响应能力；③叶片的不同解剖性状在属、种类和种群间的变化并不同步，其中叶片和栅栏组织厚度等性状差异突出，反映它们更易受环境的饰变，是生态适应性状，而海绵组织、下角质膜，特别是下表皮厚度等性状差异较小，显示出这些性状的稳定性，可以认为是系统演化性状；④苦槠、青冈具有较厚的叶片、栅栏组织、角质膜和发达输导和机械组织，苦槠还具有复表皮，表现出对旱化生境的适应；甜槠尽管具有复表皮和较厚的叶片，但这是海绵组织增厚的结果，是对中生生境的适应；小叶青冈和细叶青冈具有较薄的叶片和栅栏组织、角质膜厚度居中等特点，可能是对中山凉湿生境的适应。

The ramet populations of the species at OSES and Inner Mongolia Grassland Ecosystem Research Station and those under conditions of monoculture and mixed with different species were compared.

对内蒙古沙地站和内蒙古草原站的单种沙鞭分株种群的比较和在各站对单种和混交沙鞭分株种群的比较发现，不同地点和在不同群落条件下的沙鞭分株种群在许多重要性状上都存在差异。

This result is consistent with the result come from PCRfingerprinting method. The results of the two methods indicate that maize, soybeanand castor-oil plant can act as refuges of Bt sensitive cotton bollworm as non-Btcotton; while sesame and peanut may not.

第三代棉铃虫的六个寄主种群间存在一定的遗传差异；其中，花生种群与其他种群间没有明显的基因交流，遗传分化比较明显；Bt棉上的棉铃虫与普通棉花、大豆、玉米上的棉铃虫敏感种群间基因交流频繁；而与花生、芝麻上的棉铃虫敏感种群间的基因流均不显著，说明它们间有可能不能进行随机交配。

The age class structure of Salix oritrepha population in alpine, cloudy and wet area of east Qilian Mountian is studied ,on two levels of genets and their ramets and sprouting branches .The results show that genets population is very short of the first and second class seedlings,and most of seedlings belong to the third and forth classes, and the development trend of population on this level is stable;on the other hand,the age structure of remets and sprouting branches population is more complete,and its age class distribution chart likes triangle, belonging to increasing type.In general,Salix oritrepha population in this area is increasing, but its reproduct way have changed in community succession process in order to accommodate varying circumstances.

从无性基株个体种群和无性克隆分株及萌生枝种群两个层次上对东祁连山高寒阴湿地区山生柳种群年龄结构进行分析，结果表明：无性基株个体种群 0~10 龄级幼苗贮备严重不足，11~20 龄级苗木所占比重最大，种群动态呈稳定型；无性克隆分株和萌生枝种群年龄结构比较完整，结构分布图呈正三角形，种群动态表现为增长型；总体上来讲山生柳种群呈增长趋势，只是在演替过程中为适应环境其繁殖方式有所改变，导致现阶段山生柳种群两个层次结构状态。

Comparative study on two levels of population and modules of mutualspecies in the two stations demonstrates that feature index tend to diminish suchas height,tussock amplitude,size,number,density and dry weight;and thegrowth analysis index incline to increase such as RGR、ULA、chlorophyllcontent and effectiveness of plant multi-leaves of the populations and DULA、DUMR、DAGA and DRGRa of the modules;and the dynamic curves of thepopulations and the modules also tend to steadily increase along with thetemperature ascending,heat accumulation and combination between water andheat in moderate-temperature steppe from fierce fluctuation alongside naturalprecipitation in warm-temperature steppe,illustrating that the transformabletendency from increasing the numbers of tussocks and tillers in order to expandthe resource range to seize in warm-temperature steppe to steadily improve drymatter production function of the populations and the modules in moderate-temperature steppe.

两个不同热量型研究站点共有种种群与构件两个水平的比较研究表明：随纬度增加和气温降低，种群与构件高度、丛幅、大小、数量、密度和干重等特征指标趋于降低和减少，而种群RGR、ULA、叶绿素含量和植物多叶性与构件DULA、DUMR、DRGR和DRGRa等生长指标则趋于增加，种群与构件的生长动态曲线也从随天然降水而剧烈波动趋向于随气温升高、热量积累和水热配置状况而稳定增长，说明各共有种从暖温型草原区增加植物种群与构件的大小和数量以扩充资源利用范围向中温型草原稳定地提高种群与构件的干物质生产性能的方面转变的趋势；同时，物质与能量的分配也从较多地投资于繁殖器官产生大量后代以适应未来降水的不可预期变化趋向于同化系统的构建和干物质生产效能的提高以抵御低温和干旱对物种生存的威胁，充分显示出不同温度条件及其水热组合对植物种群形态结构和生长繁育模式的显著影响及其响应特征。

与种群比较相关的网络解释 [注：此内容来源于网络，仅供参考]

Datura stramonium：曼陀罗

在曼陀罗(Datura stramonium)的移植种群中,比叶面积、叶面积比和叶片数都具有显著的可塑性,这些特征都与捕光能力对高密度的响应有关. 同样地,这种植物在响应于四种环境因子的限制中展示出显著的繁殖分配的可塑性. 对不同物种可塑性进行比较,

ecospecies：生态种

一个物种通常可以包括许多种群,不同种群之间存在着明显的地理隔离,长期隔离的结果有可能发展为不同的生态种(ecospecies),甚至产生新的物种. 如油松从河南、山东向北分布到辽宁,内蒙,其分布比较广阔,显然不能说它们是一个种群,

group comparison：组群比较,分组比较,种群比较

group column 群柱 | group comparison 组群比较,分组比较,种群比较 | group compensation 组补充

Sinocyclocheilus anophthalmus：无眼金线鲃

无眼金线鲃(Sinocyclocheilus anophthalmus)是一种典型洞穴鱼类,已知只分布在云南宜良九乡麦田河畔的个别溶洞中,种群数量比较稀少,被列为濒危种类,亟待开展有效的保护,有关科学调查则是保护工作顺利进行的基础.利用现有条件,扩大附近已有的保护区的保护范围,

nitrosomonas：亚硝化单胞菌属

氨氧化菌种群多样性受溶解氧的影响非常大,而亚硝酸氧化菌的种群多样性比较单一,且不受溶解氧的影响.结合FISH (全细胞荧光原位杂交) 分析结果表明,在OLAND限氧稳定运行后期,亚硝化单胞菌属(Nitrosomonas)是主要的氨氧化菌,

phylogenetic tree：系统发育树

变换类型包括:转换(G→A、A→G、T→C、C→T)、颠换(G→T、A→T、T→A、C→A)、插入(CA)和缺失(TGTTTT).东方田鼠长江亚种和指名亚种两个种群之间存在明显差别,尤其是在146、192、223、224、235位,但两种群间同源性仍高达98%.同时采用系统发育树(phylogenetic tree)分析方法,对两个亚种的亲缘关系进行了分析和比较,

rattus niviventer：社鼠

以1989至1995年在川西平原农田进行的啮齿动物标志重捕实验为基础, 由种群密度、生物量以及出现频率的比较认为, 大足鼠(Rattus nitidus)为此啮齿动物群落的优势种, 褐家鼠 (Rattus norvegicus)与社鼠(Rattus niviventer) 为常见种 , 黄胸鼠