多样性
- 与 多样性 相关的网络例句 [注:此内容来源于网络,仅供参考]
-
The diversity index of broadleaved forest and bush, the evenness index of conifer forest and broadleaved forest,the dominance index of bare rock and farmland were higher than that in the other habitat types.
对5种不同生境类型的蝶类多样性进行分析,物种多样性指数最高的为落叶阔叶林和灌丛,均匀度指数最高的为针叶林和落叶阔叶林,优势度最高的为裸岩和农田。
-
On the basis of analyzing the concept frameworks of the three kinds of impacts, a combined method of catastrophe and synergistic for cumulative PEIA and "Radar figure and Don Jones index"method for assessment of sustainability related environmental impact associated with policy are raised, and fuzzy altering weight integrated method for impact assessment on biodiversity is set up by combining fuzzy control altering weight.
在分析和说明它们各自概念特征的基础上,提出了政策累积环境影响突变论和协同学相结合的评价方法构想和与可持续性相关的政策环境影响的&雷达图-道琼斯指数&评价方法,并把模糊控制变权思想结合进生物多样性影响模糊综合评价方法之中,创立了政策对生物多样性影响的模糊变权综合评价方法。
-
Investigation, conducted at Huocheng, Xinjiang Autonomous Region, revealed that all characteristics of Xinjiang wild apples appeared in a fair variation. Results indicated that, every characteristic exists biodiversity; most coefficients of variation of characteristics were larger than 0.2%; there were a great number of gene types among which two characteristics (the resistance and crown density) were in a significant variation.
生物多样性是指一定空间范围内多种多样生物体有规律结合在一起的总称,生物多样性是人类赖以生存和经济可持续发展的物资基础,已被联合国环境规划署确认为与全球气候变暖、臭氧层破坏和有害废物转移息息相关并列的全球4大环境问题之一,成为生态科学的热点[1]。
-
The results show that as the crown density reduces the foresttype diversity increases and as the diversity goes up the stability of stand comes down; that the forest is under regressive succession and its stability now is the lowest; that the growth of spruce and fir trees has obviously a n...
结果表明:该林区的林分类型多样性随郁闭度的降低而增加,林分的稳定性随多样性的增加而降低,林分处于逆向演替过程中,林分的稳定性处于最低限;云、冷杉林与环境因子——海拔之间呈明显的负相关;在高海拔区云、冷彬林十分脆弱,一旦原有种群结构的郁闭度低于0.3,森林的稳定性将被破坏,即使在完全封禁的条件下,25年生的疏林要恢复到有林地状态,需要40年的时间。
-
Conservation and research of desert plant diversity is an important part of the biodiversity protection.
荒漠植物多样性研究及其保护是生物多样性保护的重要组成部分。
-
Zoological Division of Chinese Biodiversity Information Center, founded by Zoology Institute of Chinese Academy of Sciences, is the research organization for biodiversity research and protection.
中国生物多样性信息中心动物学分部是中国科学院动物研究所组建的、对生物多样性进行研究和保护的研究机构。
-
Result shown: value of fractal dimension is a comprehensive index, which reflect the changes of landscape, patch areas, patch numbers, area per patch, and their interaction. And the index can reflect the irregular degree and the complex degree of landscape patch in dumping place. The fractal dimension of mixed vegetation of arbors – shrubs and mixed vegetation of shrubs maintain the high level, while fractal dimension of new reclamation land and grass land are low. The difference of other type landscape fractal dimension is not significant. Vegetation landscape is influenced by many kinds of factors. It is primarily influenced by surface material composition and terrain in south and west dumping place, which diversity index is high. It is primarily influenced by vegetation type in inner dumping place and expanded west dumping place. The landscape multiplicity index of the mixed vegetation of grass and shrubs is higher than other landscape type, but landscape dominance index of this area maintains on the lower level.
结果表明:分维数的大小反映了景观斑块面积、斑块数量和平均斑块面积等因素的相互作用,反映了排土场内景观斑块的不规则程度和复杂程度;乔灌混交地和灌木混交地保持着较高的分维数,新造复垦地和草地的分维数较低,其它景观类型的分维数则差别不大;植被景观受多种因子的影响,在南排土场、西排土场受地表物质组成和地形的影响为主,其多样性指数较高,在内排土场、西排扩大区受植被类型的影响为主;草灌混交地的景观多样性远高于其它现有的复垦植被区,但其景观优势度则保持在较低水平上。
-
This study provided the analysis of changes of species diversity and productivity in relation to soil properties in six typical habitats (wet meadow, dry grassland, fixed dune, semi-fixed dune, semi-shifted dune, and shifted dune) in Horqin Sand Land.
研究了科尔沁沙地6个典型生境类型的沙质草地群落物种多样性与生产力的变化,分析了植物群落格局、物种多样性、生产力与土壤特性的关系。
-
In the east of Jiuding mountain, arbors dominated the upper layer of the community, and their shade has a significant effect on shrubs and grasses underneath from the valley to the forest borderline.
在野外样带调查的基础上,分析了沱江源头九顶山植被生物多样性随海拔而变化的规律,并简要分析了植被生物多样性垂直格局的影响因子。
-
300 pieces of idioplasm resources of the Tibetan edible cultivation spring naked barley is identified for characteristic of shape, agronomic characters, rust-resisting property and grain thick protein,β-grape polymerization sugar and Vitamin E and so on from the Tibetan different region, which are analysed result in, for one thing, multiplicity of Tibetan spring naked barley is quite rich for the variation of the awn, leaves and the grain color, and multiple property are highest; Secondly, it has some fine hereditary characters of early maturation, big spike, many grains, many arrises and the strong anti-rust quality; Thirdly, genetic potential which is used possibly is enormous for characteristic of dense spike, exiguous spike, naked grain , the hook awn, short stem, the anti-rust and so on ; Fourthly, thick protein,β-grape polymerization sugar and Vitamin E of grains are rather difference to environmental condition of the various areas.
从西藏各地征集的300余份食用栽培春青稞种质资源,从形态特征、农艺性状、抗锈性和籽粒粗蛋白、β-葡聚糖含量、维生素E等特征特性鉴定、评价。分析结果认为:(1)西藏春青稞多样性极为丰富,如芒、稃和籽粒颜色,具有变异最为丰富,多样性最高的特点;(2)具有早熟、大穗、多粒、棱型多,以及抗锈性强等和耐各种不良环境因素的优良遗传性状;(3)具有密穗、稀穗、裸粒、钩芒、矮生、抗锈等可利用基因潜力巨大等特色;(4)籽粒粗蛋白、β-葡聚糖、维生素E等成份因各地区环境条件不同差异较大。
- 推荐网络例句
-
Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.
Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。
-
I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.
我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。
-
The shamrock is the symbol of Ireland and of St.
三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。