1) α,β-diversity
α、β多样性
3) α and β-diversity
α及β多样性
1.
Analysis on plant α and β-diversity of wetland eco-system in semi-arid region
半干旱地区湿地生态系统植物α及β多样性分析
4) β-diversity
β-多样性
1.
Taking α-diversity index(including Shannon-Wiener index,Simpson index, Jsw,and Js which are community evenness indces) and β-diversity index(measured by similarity coefficients),biomass change coefficient as targets this article analyze the stability of plant community under different measures of desertification control in Yanchi County,Ningxia from two criteria about space and time.
以植物α-多样性指数(Shannon-Wiener指数Sw、Simpson指数Sp、群落均匀度指数Jsw和Js)和β-多样性指数(相似性系数Cs)、生物量变动系数为指标,从空间和时间2个尺度上分析宁夏盐池县不同荒漠化治理措施下的植物群落稳定性。
2.
Using selected measure methords of α-diversity and β-diversity, the diversity of the species, genus family in this community and their relationship with the environmental conditions were analyzed.
定量分析鹿回头岸礁造礁石珊瑚群落的种类组成，选择α－多样性和β－多样性的度量方法，分析了该群落造礁石珊瑚种、属和科的多样性及其与所处生境的关系。
5) β-diversity
β多样性
1.
According to field investigation,β-diversity were used for analyze vegetation distribution along the(Geermu-Lhasa section of) Qinghai-Tibetan Railway.
通过实地考察,采用β多样性分析了青藏铁路沿线(格尔木—拉萨段)植被生物多样性及生境分割程度,并讨论了环境因素对植被分布的影响。
2.
By field investigating of reed community characteristics and acquiring monitoring data, we analyzed the bio-ecological characteristics and β-diversity of reed communities in different environmental grads (mainly based on water depth) of Yellow River Delta with methods of multi-analysis, extremum analysis and β-diversity index analysis.
通过野外调查芦苇种群特征及获取的监测数据,应用多元统计法、函数极值法以及β多样性指数测度法,对黄河三角洲芦苇种群在不同环境梯度(以水深为主)条件下的生物生态学特征及β多样性进行了分析。
3.
The paper studys the β-diversity pattern of subalpine meadows in Wutai Mountain with the altitude above sea level by analyzing diversity index in terms of the binary and numerical data,Cody index,Wilson index,Shmida index and Sorenson index,and Bray-Curtis index in term of numerical data.
分别应用基于二元属性数据的群落相异性系数、Cody指数、W ilson和Shm ida指数及Sorenson指数和基于数量数据的B ray-Curtis指数对五台山亚高山草甸的β多样性沿海拔梯度的变化规律进行了研究。
6) β diversity
β多样性
1.
Primary study on α and β diversity of different habitats of alpine grassland plant community in Eastern Qilian Mountains;
东祁连山高寒草地不同生境类型植物群落α及β多样性的初步研究
2.
β Diversity of Plant Community in "Black-soil-patch"degraded Grassland,Alpine-cold Wetland and Their intersectional Area;
“黑土滩”退化草地、高寒湿地及其二者交错区植物群落β多样性
3.
Effect of the Qinghai-Tibetan Highway on the β diversity of grassland plant communities in the northern region of the Qinghai-Tibetan Plateau;
人类工程对青藏高原北部草地群落β多样性的影响
补充资料：2α,17α-Diethinyl-A-nor-5α-androstane-2β,17β-diol
分子式：C22H30O2
分子量：326.48
CAS号：52-74-4
性质：产品为结晶化合物。
制备方法：可用3β-乙酰氧基雄甾-5-烯-17-酮经催化氢化、水解，生成3β-羟基雄甾烷-17-酮，然后以铬酸氧化开环（A）、环合得A-失碳雄甾烷-2,17-二酮，最后以乙炔炔化制得该品。
用途：双炔失碳丙酯的中间体。
分子量：326.48
CAS号：52-74-4
性质：产品为结晶化合物。
制备方法：可用3β-乙酰氧基雄甾-5-烯-17-酮经催化氢化、水解，生成3β-羟基雄甾烷-17-酮，然后以铬酸氧化开环（A）、环合得A-失碳雄甾烷-2,17-二酮，最后以乙炔炔化制得该品。
用途：双炔失碳丙酯的中间体。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条