多样性

This essay aims at theoretical analysis of potential conflicts between the UNESCO Convention and WTO agreements.It appeals to the recognition of the current situation and the feasibility of harmony of culture and trade in China.

通过对文化多样性公约与WTO体系下的相关具体规定进行比较研究，对两者可能发生的冲突进行理论分析与评价，呼吁作为WTO与文化多样性公约成员国的中国应重视文化与贸易冲突的现状，采取相应措施实现文化与贸易的和谐。

In this paper, four diversity indexes were considered as quantitative indicators of understory for urban forest, while the features of environment variables were recorded at the corresponding quadrat scale.

以4类多样性指数作为衡量城市森林林下层植物多样性差异的定量指标，并同时记录对应样方尺度的环境变量特征。

Applying quadrat method,the vegetation of Yanchi county of Ningxia Ningxia Hui Autonomous Region was investigated to study the influence of different fencing time on community structure and biomass.

在宁夏自治区盐池县人工封育区采用样方调查法对不同封育年限封育区植被的群落结构和生物量进行调查分析，并运用丰富度指数、均匀度指数和综合性多样性指数分析生物多样性变化。

The study first use ecological-economical classification of rangeland plant ,which can representrangeland vegetation characteristics, purpose and worth.

多样性指数法的生态学的原理，将草地类型多样性从定性描述深入到定量研究。

Based on the relationship between species and area,the rarefaction is an effective method for assessing the biodiversity in a regional scale.

在生物多样性保护实践中，多样性指数常被用来作为评价群落或生态系统状况的重要指标〔1-5〕，从而为制定保护对策提供依据。

Major results were summarized as follows:(1) A total of 58 tree species from 53 genera in 36 families among which 8 species were Rosaceae, 5 species were Liliaceae, 5 species were Eriaceae, 3 species were Ranunculaceae, 3 species were Compositae, 2 species were Cupressaceae, 2 species were Caprifoliaceae, 2 species were Umblliferae, and other 28 tree species were only one receptively. These were recorded in the 8 plots of the A. georgei var. smithii forest;(2) Number of families, genera, species and Margalef index correlated negatively with altitude (P.05), with a peak at 3600 m.(3) Shannon-Wiener index correlated negatively with altitude (P.01), and maintained stable at the altitudes between 3700~4100 m, evenness with altitudes, however, this trend was insignificant.(4) Jaccard index increased sharply with increasing altitude at the altitudes between 3600~4100 m, and was lower between different vegetation types at the altitudes between 4100~4200. Cody index β(subscript c decreased with an increasing altitude, but there were 2 troughs between 4000~4100 m and 4200~4300 m.(5) Maximum tree height H(subscript max and HH(subscript max=37 mcorrelated negatively with altitude (P.05); but basal area and BA BA(subscript max=5.3m^2 correlated with altitudes, however, this trend was insignificant.

结果表明：(1)在调查的8个急尖长苞冷杉林样地内共有植物58种，分属于36科53属，其中植物较多的科有蔷薇科8种、百合科5种、杜鹃花科5种、毛茛科3种、菊科3种、柏科2种、忍冬科2种、伞形科2种，其余的28科各只有1个种；(2)物种科、属、种数、Margalef指数D(下标 M与海拔存在显著的负相关性(P.05)，在分布急尖长苞冷杉最低海拔3600m处出现物种丰富度的最大值；(3)多样性指数与海拔之间有极显著的负相关性(P.01)，并且在3700~4100m之间多样性指数保持稳定；均匀度指数与海拔梯度之间存在负相关性，但不显著；(4)Jaccard指数C(下标 j在海拔3600~4100m随海拔的升高而升高，在生境过渡带的4100~4200m之间Jaccard指数C(下标 j较低；Cody指数β(下标 c随海拔的升高呈下降的趋势，但在4000~4100m和4200~4300m 海拔区间出现2个低谷；(5)最大树高H(下标 max和最大胸径DBH(下标 max与海拔之间存在显著负相关性(P.05)；胸高断面积之和和立木密度与海拔之间存在负相关性，但不显著。

In purplish soil, the number of dominant microbial populations in the rhizosphere was greater than in the other two soils, and the population diversities of bacteria and actinomycetes were even greater and more constant, suggesting that the community structures of microorganisms in neutral purplish soil were more reasonable than in both yellow earth and yellow rendzina, which was probably related to the low incidence of tobacco bacterial wilt in the neutral purplish soil.

烤烟根际微生物的种群多样性及其变化在不同土壤中表现也不一样，相对于黄壤和黄色石灰土，在中性紫色土中，根际微生物的优势种群数目较多，根际细菌和放线菌种群更具多样性，而且较稳定，表明其群落结构更为合理，这可能与中性紫色土上的烟草青枯病发生率较低有一定关系。

Beijing compared with the current hot real estate is residential projects, which in the CBD planning to do a lot of residential projects, the current developer and will soon come into the main developers of residential projects have been doing from the function, if the CBD Central Business District there are some changes in function, it will affect the development of CBD.

太多北京住宅项目相比，目前的热点是房地产住宅项目，这些项目在CBD的规划做了大量的住宅项目，目前的开发和即将开发的主要住宅项目已经做了功能，如生物多样性公约中央商务区也有一些变化的功能，它会影响生物多样性的发展。

This paper presents the composition structure of plant biodiversity in Maqu, a county of Gannan Tibetan Autonomy Prefecture and located at the northeastern edge of the Qinghai-Tibetan Plateau. which is he riverhead of the Yellow River. With the analytic hierarchy process, the reasons of deterioration and the measurers of restoration are given.

本研究对青藏高原东北缘黄河源头地区甘南藏族自治州的玛曲县高寒草甸及湿地进行调查，揭示了该地区的植被生物多样性情况与组成结构，利用解析层次方法分析了高寒草甸及湿地的退化原因及恢复手段，同时还从集合种群竞争原理出发对该地区植被生物多样性的维持机理进行了讨论。

This paper presents the composition structure of plant biodiversity in Maqu,a county of Gannan Tibetan Autonomy Prefecture and located at the northeastern edge of the Qinghai-Tibetan Plateau,which is the riverhead of the Yellow River.With the analytic hierarchy process,the reasons of deterioration and the measurers of restoration are given.

本研究对青藏高原东北缘黄河源头地区甘南藏族自治州的玛曲县高寒草甸及湿地进行调查，揭示了该地区的植被生物多样性情况与组成结构，利用解析层次方法分析了高寒草甸及湿地的退化原因及恢复手段，同时还从集合种群竞争原理出发对该地区植被生物多样性的维持机理进行了讨论。

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。