(1)物种丰富度指数(species richness index) a. Gleason(1922) 指数 InA S D / 式中,A 为单位面积,S 为群落中的物种数目。www.docin.com|基于6个网页 2. 物种丰富度指數 a. 物种丰富度指數(species richness index) ir.niu.edu.tw|基于1 个网页 3. 种丰富度指數 种丰富度指數(species richn...
species richness index基本解释 物种丰富度指数;丰富度指数 分词解释 species物种 richness丰富 index索引猜你喜欢 science citation index科学引文索引 list index out of bounds列表索引超出界限 string index out of range游戏网页又出现 index of指数:用于衡量某种现象或变化的数量指标。 js indexofjs索引 ...
Plant species richness index, Shannon-Wiener diversity index, Simpson diversity index, and Pielou evenness index in the reclaimed mining area.Junjian LiYuanming ZhengJunxia YanHongjian LiXiang WangJizheng HeGuangwei Ding
It would appear that an unambiguous and straightforward index of total species richness,S, would be the cumulative number of unique species present in a series of samples. The magnitude ofS, however, depends on the size, number, and dispersion of samples in a particular habitat, biome, or are...
However, we have little understanding of how environmental heterogeneity shapes the effect of diversity on ecosystem functioning and to what extent this diversity effect is mediated by variation in species richness or species turnover. This knowledge is crucial to scaling up the results of experiments...
Species richness, hotspots, and the scale dependence of range maps in ecology and conservation. Proc. Natl. Acad. Sci. USA 104, 13384–13389 (2007). CAS PubMed PubMed Central Google Scholar Alhajeri, B. H. & Fourcade, Y. High correlation between species-level environmental data estimates...
Indices describing species diversity include species richness, the Shannon index, the Simpson index, and the Complement of the Simpson index. The difference between species diversity and species richness Species richness, very simply, is a count of the different species in a given ecosystem, region,...
Simpson’s indexThis chapter reviews the literature on species richness and species diversity. The two concepts are closely related, but are not synonyms. Species richness is estimated dividing the number of species by the geographic area. On the other hand, species diversity is a function of ...
While area had a positive effect on species richness, shape index and fragmentation had negative effects. Proximity had a significant positive effect only for mammals and a negative effect for all the taxa combined. PA spatial features showed significant interactions between them and with environmental...
Habitat heterogeneity (HH) was summarized using the Shannon diversity index following Turner et al. (2001) based on habitat types (richness) and their areas (abundance). Here, habitat types and their areas in each elevational band were estimated in the ArcGIS 10.2 using the Globcover 2009 ...