多样性指数

• The environment quality of layzhou bay in may and augest of 2002 was evaluated with the multinomial exponential synthetic evaluation model , the diversity index synthetic evaluate model and the main component part analyse method
  摘要应用多项指数综合评价公式、生物多样性指数综合评价公式和主成分分析方法对莱州湾2002年5月和8月生态环境质量进行了综合评价。
• It is found out through the study on soil seed bank of seabuckthorn community and standing vegetation that along with the increase of secondary reclamation time of sample lands , the increasing trend of index of diversity of species is decreased
  但是通过对沙棘群落土壤种子库和地上植被的研究发现，随着样地复垦时间的增加，其物种多样性指数的提高趋势下降。
• We used several kinds of indices of diversity and the result shows highest diversity in summer community of maoxian ecological station and lowest diversity in autumn community of shilixiang and highest evenness in autumn community of shangkakagou
  最后，应用经典的多样性指数、均匀度指数、种-多度模型对岷江上游典型退化生态系统的鸟类物种多样性进行了研究。
• The water quality state was evaluated with shannon - weaver index and some indicators of periphyton , and results showed that the nutrient type of daoguanhe rerservoir was mesotrophic type , and it had a tendency to develop to the eutrophic type
  11 .依据周丛藻类多样性指数及周丛生物某些指示种类评价该水库水质状态，判定为中营养型，并有向富营养级演化的趋势。
• The higher ppb ( 77 . 99 % ) was in subp . 2 and lower ( 61 . 04 % ) in subp . 5 . the ppb ' s order was subp . 2 > subp . l > subp . 4 > subp . 3 > subp . 5 . the result revealed higher genetic diversity level in p . sibirica
  利用shannon多样性指数估计5个亚居群的遗传多样性，叉毛蓬亚居群内和亚居群间的遗传多样性所占的比例分别为69 . 33和30 . 67 ，遗传变异大部分存在于亚居群之内。
• Spatial diversity index was cited to describe the wild life habitat pattern quantitatively . and the habitat pattern change of wild animals and red - crowned cranes ( grus japonensis ) , as indicator species , between 1988 and 1998 was analyzed
  引用空间多样性指数( s _ d )对本区野生动物生境格局和指示物种丹顶鹤的生境格局进行了定量描述，并分析了其十年间的生境格局变化。
• The species number of zoobenthos in east tangsun lake , niushan lake , longgan lake and huang lake were 36 , 24 , 33 , and 18 , respectively . the differences in species richness and species diversity in the four lakes were obvious
  主要结果如下：东汤孙湖、牛山湖、龙感湖、黄湖四个湖泊底栖动物的种类数分别为36 、 24 、 33 、 18 ，各类群的种类数以及生物多样性指数相差很大。
• The thesis used the diversity index , dominance index and evenness index to analyse the landscape patterns in the county , showing the embodying of the spatial characters caused by the man - made disturbance and landscape succession
  接着，对柘荣县的景观格局进行分析。选用景观多样性指数、均匀度指数、优势福建拓荣县景观生态特征及景观生态规划的研究度指数对景观格局进行分析。
• Acoording to the comparison among bird species in five different habitats in jinzhongshan , the results indicate that the highest bird species diversity index is in scrub and farmland ( 3 . 04 ) , and the lowest in water area ( 2 . 14 )
  本文还对金钟山鸟类保护区的5种不同生境类型的鸟类种类组成作了比较，结果表明灌丛农田的鸟种多样性指数最高，为3 . 04 ；水域的鸟种多样性指数最低，为2 . 14 。
• The results showed that : from north - facing slope to south - facing slope and plain field , the species evenness and diversity index decreased ; from plain field to north - facing slope and south - facing slope , richness index also decreased
  结果表明，当生境由阴坡向滩地到向阳坡变化时，各种多样性指数的变化顺序为，物种丰富度：滩地阴坡阳坡；均匀度和多样性指数：阴坡阳坡滩地。