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community index
相关语句
  群落学指标
     The Community Index of Assessing Ecosystem Health
     生态系统健康评价的群落学指标
短句来源
  “community index”译为未确定词的双语例句
     Based on the measure formula of species diversity, species community index concerning 20 pieces of sample land was calculated according to 3 layers including tree layer, herb layer and shrub layer. The results showed that the abundance degree of any two species of a community showed same characteristics, which were herb layer> shrub layer> tree layer;
     根据物种多样性测度公式,对20块样地按乔木层、灌木层、草本层3个层次,分别计算物种多样数指数,结果各类群落的两种物种丰富度均表现出草本层>灌木层>乔木层的特点;
短句来源
     Basing on this, the principles for the foundation of Ecological Residential Community index system were suggested and a relatively inte- grated index system founded according to the principles of the“sustainability theory” and the“ composite ecosystem theory”.
     在此基础上,提出生态住区评价指标建立的基本原则,并以可持续发展理论和复合生态系统理论为指导,建立了一个较完整的生态住区评价指标体系,以此对南京市龙江小区作出生态评价。
短句来源
     17 species occurred in infauna and the dominance species obviously changes as the seasons going. From the community index,infauna community is instable.
     结果表明,底内动物共出现17种,种类组成贫乏,优势种变化明显,生物量较1982~1983年杭州湾调查资料有一定降低,物种多样性指数低并有下降趋势,群落结构极不稳定;
短句来源
     There are obvious differences of the season dynamics of community index in different jujube yards.
     各枣园主要枣树害虫群落指数的时序动态在不同生长季节有一定的差异,但仅从主要害虫群落指数来评判枣园枣树主要害虫群落的特征与功能是不全面的。
短句来源
  相似匹配句对
     community.
     群落。
短句来源
     Index
     索引
短句来源
     index;
     指标;
短句来源
     Community
     社区
短句来源
     The Community Index of Assessing Ecosystem Health
     生态系统健康评价的群落学指标
短句来源
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  community index
Subjects were 20 adult learners, evenly divided between males and females, who were administered the sense of classroom community index at the beginning and end of the course in order to measure classroom community.
      
The macroinvertebrate community proximal to the coal ash effluent had the highest number of taxa and total number of individuals; a high number of mayfly and caddis fly taxa; and the highest Invertebrate Community Index score.
      
The bird community index (BCI) sorts bird species found at sample sites into a series of values representing the proportional species richness of 20 behavioral and physiological response guilds.
      
A Bird Community Index of Biotic Integrity for the Mid-Atlantic Highlands
      
A multimetric fish index, the Estuarine Fish Community Index (EFCI) of Harrison and Whitfield (2004), was applied to data collected for 190 South African estuaries.
      
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The present paper deals with the secondary forest vegetation after 20years period of natural regeneration. The field study was carried out on Mt.Wuchao near Hangzhou, Zhejiang Province. According to Jaccard’s community index of similarity, the secondaryvegetation was divided into three types:the deciduous mixed forest, theevergreen mixed forest-a sere towards a higher stage of evergreen broad-leafclimax community, and intermediate type. The life forms were according toRaunkiaer’s classification:phaenerophyta...

The present paper deals with the secondary forest vegetation after 20years period of natural regeneration. The field study was carried out on Mt.Wuchao near Hangzhou, Zhejiang Province. According to Jaccard’s community index of similarity, the secondaryvegetation was divided into three types:the deciduous mixed forest, theevergreen mixed forest-a sere towards a higher stage of evergreen broad-leafclimax community, and intermediate type. The life forms were according toRaunkiaer’s classification:phaenerophyta (74.4%), chamaephyta (13.5%),hemicryptophyta (4.1%), geophyta (6.8%), and therophyta (1.4%). The highpercentage of phaenerophyta is similar to the life form spectrum of theevergreen broad-leaf forest of Zhejiang Province. The leaf size of thevegetation was mainly microphylla (60.3%) but which is higher than those ofthe evergreen broad-leaf forest in other place of the province. 82.5% of theleaf pattern was simple leaf. The recovery vegetation stratification weredivided into:arborous layer, shrub layer, herbaceous layer and ground layer. According to Lutz’s phytograph index the most important tree specieswere:Lithocarpus glaber, Cyclobalanopsis glauca, and Quercus glandulifera var.brevipetiolata in which density, frequency, cross-sectional area and itsappearence in the under and over story were predominant. Next is Castanopsisfargesii, Castanopsis sclerophylla and Schima superba. The recovery forest has a growing-stock of 50m~3 per hectare, the highestis found to be above 140m~3 per hectare. A total of 62 species of spermatophyta in 27 families and 45 genera wasobserved in the field during the study period and a comparison of its floraand geographical distribution was carried out.

本文是对午潮山森林植被遭破坏后,经过20年的封山育林,植被在恢复过程中的群落学研究。按Jaccard植物群落相似性系数统计,植被可分三个类型:以落叶树种在数量上占优势的混交林;以常绿植物的种类在数量上占优势的混交林;处于二者之间或处于恢复演替过程中的更高阶段。按Raunkiaer生活型谱统计:高位芽植物占74.4%,地上芽植物占13.5%,地面芽植物占4.1%,地下芽植物占6.8%,一年生植物占1.4%,与本省常绿阔叶林的生活型谱有些相似,都是以高位芽植物占优势。叶的性质以小型叶为主,占60.3%,只是微型叶的比例较本省其它各地高。叶型以单叶比例最大,占82.5%,群落在结构上可分乔木层,灌木层,草本层和地被层,亦有数量不多的层间植物,乔木层一般还没有出现层的分化。按Lutz林木结构图解统计表明:石栎、青冈、枹树它们在密度、频度、断面积和上下层中的出现率方面都占优势,是群落中的优势种,其次是丝栗栲、苦槠、木荷。恢复的幼林每公顷蓄积量都在50立方米以上,最高的可达140多立方米。出现的种子植物计有62种,隶属27科45属,文中对这些植物的区系地理成分进行了分析比较。

In this paper, the ecological characteristics of zooplankton in feeding grounds of mackerel and scads from Southern Yellow Sea and East China Sea were studied by comparing methods. It showed that the extreme difference and variation coefficient of zooplankton biomass in southern foeding ground were less than those in northern feeding ground. The average value was higher in southern than in northern feeding ground, if the influence of biomass in a few stations could be negleoted. In northern feeding ground, community...

In this paper, the ecological characteristics of zooplankton in feeding grounds of mackerel and scads from Southern Yellow Sea and East China Sea were studied by comparing methods. It showed that the extreme difference and variation coefficient of zooplankton biomass in southern foeding ground were less than those in northern feeding ground. The average value was higher in southern than in northern feeding ground, if the influence of biomass in a few stations could be negleoted. In northern feeding ground, community indices as diversity, homogeneity, abundance and simplicity were higher, and in southern feeding ground, they are to the contrary. The number of dominant species of zooplankton was less in northern than in southern feeding ground, but most of dominant species had higher aggregated intensity. On the contrary, the dominant degree in southern feeding ground was lower, and association density was also lower.

本文采用比较的方法,研究了黄海南部东海北部和东海中南部两个鲐鲹鱼索饵场浮游动物生态特征。结果表明,南部渔场生物量的极差、变异系数小于北部渔场。若扣除个别站位的影响,则南部渔场的平均值高于北部渔场。北部渔场群落多样度、均匀度、丰富度、单纯度较高,南部渔场则相反。北部渔场浮游动物优势种较少,且大多数种具有较高的聚集强度;而南部渔场优势种较多,优势度低,聚集性差。

The yield physiology and sink-source relation as well as regulation approach of latehybrid rice were studied,and the main results obtained was summarized as fellows.1.5460s/Guang Kang Gen NO.2 and W6154s/Zao Te qin are both source-limitedtype,while San-You NO.63 is sink-limited one.2.Increasing application amount of nitrogen fertilizer,especially at tillering stage,canincrease effective community index,but show little affection on the sink capacity,So it candecrease the ratio of sink capacity to effective...

The yield physiology and sink-source relation as well as regulation approach of latehybrid rice were studied,and the main results obtained was summarized as fellows.1.5460s/Guang Kang Gen NO.2 and W6154s/Zao Te qin are both source-limitedtype,while San-You NO.63 is sink-limited one.2.Increasing application amount of nitrogen fertilizer,especially at tillering stage,canincrease effective community index,but show little affection on the sink capacity,So it candecrease the ratio of sink capacity to effective community index.3.The ratio of sink capacity to effective community index has close correlation withsink-cource index,So it can be taken as targets for regulation of the relation between sinkand source in rice cultivation.4.The difference of setting percentage of rice appears mainly in middle and low sec-ondary branches kernal,the setting percentage of middle and low secondary brancheskernal were used to judge sink-source relation can improve sensitivity.

本文从茎蘖动态与成穗率、叶面积动态、干物质生产动态、籽粒灌浆特性等方面分析了三种杂交组合的产量形成规律,并探讨了其源库特征及类型.结果表明,库容/有效群体指数较好地反映了库源相互关系,以其作为判断源库关系的指标是适宜的.水稻结实率差异主要表现在中部及下部二次枝梗籽粒(弱势粒),只有弱势粒结实率才反映源库关系.另外,亚种间杂交组合5460S/广抗粳2号为源限制型,其干物质生产、运转、株型、库容量表现出较大优势,但成穗率低,结实率和充实度低,高产措施必须在较高叶面积基础上提高净同化率.

 
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