江西武夷山国家级自然保护区爬行动物多样性调查研究

本研究区共记录爬行动物59种,占江西爬行动物的71．08％,隶属于2目11科41属。区系构成以东洋界物种为主,计51种,占86．44％;广布种8种,占13．56％。列入中国濒危动物红皮书的18种,列入中国物种红色名录的17种。中国特有蛇类11种,有毒蛇14种。新增江西新纪录灰腹绿锦蛇、崇安斜鳞蛇2个种。提出对爬行动物的保护不但要注意生境的保护,还要对传统文化中对爬行动物的错误认识进行纠正。     

西藏色季拉山野生花卉植物资源的研究

西藏色季拉山区有丰富野生花卉植物资源,具有较高的开发利用价值,是西藏花卉资源最丰富的地区之一。该文在广泛深入地调查、采集、整理和鉴定的基础上,研究了色季拉山花卉资源的多样性性质。该区有较高观赏价值的花卉达79科161属340余种,具有种类丰富,名花众多;花色结构和花期呈多样性;植物区系成分复杂,特有植物多;垂直分布明显;形态各异,色彩绚丽等特点。根据本区野生花卉植物资源的种类、区系成分和特征、开发和保护现状,对本区野生花卉植物资源的开发利用进行了探讨,旨在为其选育与开发利用提供理论依据。     

Nakagami衰落信道中STBC码的性能估计

基于Alamouti提出的BPSK调制下空时分组码在Rayleigh衰落信道中的码性能原理,推导出高阶调制方式下Nakagami衰落信道中空时分组码的符号差错率的最小距离球界,仿真分析了两信道下引入空时分组码的多天线系统中发射和接收天线分集增益,发射天线数量的“地板效应”．     

The genus Thoradonta in Thailand (Orthoptera: Tetrigidae: Scelimeninae) with description of two new species

The genus Thoradonta Hancock (Orthoptera: Tetrigidae: Scelimeninae) is newly reported from Thailand. Two new species of the genus, Thoradonta lativertexoides sp. nov. and Thoradonta spiculobaoides sp. nov., are described and illustrated with photographs and compared with similar species. A taxonomic review of the genus Thoradonta is provided and a key to all known species of the genus is given.     

九连山自然保护区山茶科植物多样性特点分析

通过对九连山自然保护区山茶科植物资源的调查研究,结果表明保护区内共有8属32种,占江西省本科植物37.2%,种类丰富,成分多样,优势现象明显。同时,该保护区山茶科植物中有些类群具有分布生境多样、较强的适应性的特点。九连山自然保护区山茶科植物属的地理成分可划分为4个分布型和2个变型,热带、亚热带分布类型占保护区山茶科植物属的87.5%,中国特有属1种,说明该区植物区系热带、亚热带性质显著,同时有一定的古老性。     

The peracarid epifauna associated with the ascidian Pyura chilensis (Molina, 1782) (Ascidiacea: Pyuridae)

Epifaunal peracarids inhabit a variety of biogenic substrata, including ascidians. Herein we examined the peracarid fauna living on the tunica of the sublittoral ascidian Pyura chilensis growing in offshore and nearshore conditions in Bahía San Vicente, Chile. From a total of 38 samples we collected 17 species of Amphipoda, five Isopoda and two Tanaidacea. The similarity between the sites was high (73.8%, Sorensen's index). Species diversity (H') was 2.8 and 2.6, evenness (J) was 0.7 and 0.6 at the offshore and nearshore site, respectively. Both species and individual number increased significantly with the size (volume) of the ascidian samples, and these relationships did not differ between the sites. Many species, in particular the most abundant ones, occurred at both sites, but some species were restricted either to the offshore (three species) or to the nearshore site (seven species). Amphipods and tanaids were the most abundant taxa at both sites. The peracarid fauna at both sites was dominated by suspension-feeding peracarids (>80% of the individuals), which utilize the ascidians primarily as shelter, feeding on allochthonous material, i.e. not originating from the ascidians. It is suggested that the high percentage of suspension-feeding species among the epifaunal peracarids is due to the fact that ascidians settle and grow at sites that provide optimal feeding conditions for these organisms.     

Digenean species diversity in teleost fish from a nature reserve off Corsica,France (Western Mediterranean), and a comparison with other Mediterranean regions

Data on the digenean parasites of 2238 teleosts from the Scandola Nature Reserve off Corsica are presented. These represent the largest general survey of digenean parasites attempted in the Mediterranean region and is the result of major collections and systematic reports published over the past 20 years. The number of different digenean species recorded from 63 fish species was 102. Full parasite-host and host-parasite lists are presented, with information on the geographical distribution of the parasites, their site within the host and the prevalence, adundance and intensity of the infections. The digenean fauna of teleosts off Corsica is compared with that in other regions of the Mediterranean and the Black Sea. A more detailed analysis of the diversity of these parasites in sparid fishes indicates that the digenean diversity off Corsica is far greater than that in other parts of the Mediterranean.     

新闻与大众传播教育的现状和发展趋势——以对美国新闻与大众传播院系教师的抽样调查为例

本文是对美国30所新闻与大众传播院系的教师进行抽样调查的报告.探讨的主要问题包括当前美国新闻与传播教育的教学内容与教学手段、教学与科技发展的情况以及未来发展的趋势.结论主要可以概括为:科技为新闻与大众传播教育带来新挑战,基本理念、基本技能地位岿然不动,多样化是其发展的必然趋势.     

河北省生物多样性动态监测指标设计——以脊椎动物多样性分布的丰富度评价为例

通过总结河北省脊椎动物物种在各县的现状分布信息,利用GIS技术分析全省脊椎动物物种丰富度分布格局,结果认为河北省脊椎动物多样性丰富的地区主要集中在西部太行山脉,北部燕山山脉和内陆湖湿地和沿海地区,而在平原地区脊椎动物物种丰富度最低。