منابع مشابه
Species richness and evenness in Australian birds.
Species richness and evenness are the two major components of biodiversity, but the way in which they are interrelated is a subject of contention. We found a negative relationship between the two variables for bird communities at 92 woodland sites across Australia and sought an explanation. Actual evapotranspiration (AET) was by far the best predictor of species richness. When AET was controlle...
متن کاملOn the mutual relatedness of evenness measures
Several evenness measures have been proposed for quantifying the distribution of abundance among community species, but none seems to be generally preferred. Since these measures have the common objective of summarizing community structure, they may be expected to be intercorrelated. In this paper, seven standard measures of evenness were calculated for 65 sample plots of ruderal vegetation wit...
متن کاملEthnobotanical study in the highland of Alvand and Tuyserkan, Iran
Background and objectives: Medicinal plants are widely used by people in the treatment of various diseases. These resources are usually regarded as part of cultural traditional knowledge. The aim of this study was to identify the information about the medicinal plants used by indigenous people of some regions of Hamedan province, Iran. Methods: The present ethnobotanical study was conducted in ...
متن کاملThe Relation between Evenness and Diversity
Contrary to common belief, decomposition of diversity into independent richness and evenness components is mathematically impossible. However, richness can be decomposed into independent diversity and evenness or inequality components. The evenness or inequality component derived in this way is connected to most of the common measures of evenness and inequality in ecology and economics. This pe...
متن کاملOf beta diversity, variance, evenness, and dissimilarity
The amount of variation in species composition among sampling units or beta diversity has become a primary tool for connecting the spatial structure of species assemblages to ecological processes. Many different measures of beta diversity have been developed. Among them, the total variance in the community composition matrix has been proposed as a single-number estimate of beta diversity. In th...
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ژورنال
عنوان ژورنال: Geographical Review of Japan
سال: 1930
ISSN: 2185-1719,0016-7444
DOI: 10.4157/grj.6.1269