多样性

The maximum values of the species richness index, Simpson index and Shannon-Wiener index of sawfly communities occurred at the altitude of 1000-1500 m, being 12.293, 0.971 and 3.830, respectively, while the dominance index was the highest at high altitude.

不同海拔叶蜂群落的物种丰富度指数、Simpson多样性指数和Shannon-Wiener多样性指数均以中间海拔(l000~1500m)最高，分别为12.293、0.971和3.830；优势度指数则以高海拔最高。

In this review, the evidence of association between poly-morphisms of PRNP and resistance or susceptibility to scrapie and its effects on reproduction and performance traits were focused. The aim is to provide theory guidance for sheep breeding resistant to disease.

文章主要介绍了绵羊PRNP遗传多样性与痒病抗病性的关系以及PRNP遗传多样性对繁殖力和其他主要生产性能的影响等方面的研究成果，旨在为绵羊抗病育种研究提供理论参考。

Both the results of ISSR and AFLP showed a low degree genetic polymorphism and gene flow, which indicated that self-pollination might be the main breeding system in T.

ISSR及AFLP遗传多样性分析表明延龄草居群内多样性程度及较低，居群间及居群内均出现了一定的遗传分化。

The results showed that the average heterozygosity was higher in 9 populations,the lowest is Jinding, the highest is San sheldrake, which ranged from 0.5137~0.6055. The average heterozygosity of 9 duck populations was 0.5523, which reflected the rich diversity. Considerable breed differentiation was observed and 25.65% of the total genetic variation came from breed differences, this result affirmed each breed was of own genetic diversity. The DA genetic distances suggested the longer differentiation existed between those breeds. The domestic duck breeds in East China were clustered into four groups based on the NJ clustering, the clustering results had some relationship with the distributions and economic utilizations of these duck breeds.

结果表明：9个品种的平均杂合度都较高，最低的为金定鸭，最高的为山麻鸭，杂合度范围为0.5137～0.6055，群体平均杂合度为0.5523，反映了各鸭种的杂合度都较高，遗传多样性丰富；华东区各鸭种间存在较大的遗传分化，25.65%的遗传变异来源于品种间的差异，更进一步反映了各品种具有本品种特征特性的多样性；通过计算DA遗传距离发现各群体的遗传距离较远，分化时间较长；NJ聚类结果将华东区家鸭资源聚为4类，NJ的聚类结果分析与几个鸭品种的地域分布和经济用途有一定关系。

The main results are: construction of Tarim desert highway shelter-forest promoted soil microbial development, and with increase of plantation time of the shelter-forest, the quantity, fatty acid diversity index of soil microbe and diversity index of bacterial DNA segment enhanced notably. As to soil microbial community structure, bacteria are dominant population with amounting for over 80% of total soil microbe, and fungi is not more than 1% of total soil microbe, but soil microbial community structure was different among three soil layers. The conclusions from study methods of conventional culture, biological marker and molecule biology were almost identical, which illuminates that construction of Tarim desert highway made soil microbial activity enhance and so promote nutrient cycle and utilization of Tarim desert highway shelter-forest land.

结果表明，塔里木沙漠公路防护林的建设促进了风沙土土壤微生物的发育，随着防护林定植年限的增加，土壤微生物数量、脂肪酸和细菌DNA片段的多样性指数明显增大；土壤微生物区系组成中，细菌是优势类群，占微生物总数80%以上，而真菌很少，不到微生物总数1%，但在不同土层间有所差异；传统培养法与现代生物标记和分子生物学方法对塔里木沙漠公路防护林地土壤微生物多样性的研究结果基本一致，说明塔里木沙漠公路防护林的建设使林地土壤生物活性有所增强，有利于林地土壤养分循环与利用。

It is suggested that the effective diversity index should be chosen for the diversity research of desert steppe.

建议在荒漠草原物种多样性研究中应该选择有效的多样性指数。

Protecting forest biodiversity is one standard of sustainable forest management, and it is an advanced subject to develop forest biodiversity index system based on forest management unit level and its assessment method in the study of SFM at home and abroad.

保护森林生物多样性是森林可持续经营的主要标准，研建森林经营单位级的森林生物多样性指标体系及评价方法是国内外森林可持续经营研究及实践的前沿课题。

This research sought to identify regional specificities and innovative approaches to the notion of cultural diversity, and to provide an overview of the different regional and subregional approaches to implementing and interpreting cultural diversity in national policy frameworks and structures.

这项研究试图确定区域特点和创新的办法来的概念，文化的多样性，并提供一个概述了不同的区域和次区域办法执行和解释文化多样性的国家政策框架和结构。

Microorganism ' s extremely abundant bio-diversity has determined they have supersession type and supersession result variety , and there are close relations with the mankind , animals and plants and environment , make microbiolody become and use a door of very active disciplines in research field .

微生物极其丰富的生物多样性决定了它们具有代谢类型与代谢产物多样性，并又与人类、动植物和环境有着密切的关系，使得微生物学成为应用研究领域里一门十分活跃的学科。

This study shows that symbiont diversity in corals with maternal zooxanthella transmission is not necessarily lower compared to that in corals that acquire their algal symbionts from the environment every generation.

本研究表明通过母系遗传获取共生藻的珊瑚共生多样性并不需要一定比从环境中获取共生藻珊瑚的共生多样性低。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。