Sentence examples for index of evenness from inspiring English sources
The Pielou's index of evenness was calculated following Pielou ([1975]) as: E = H ′ H max ′.
Pielou's index (J') of evenness varied from 0.8 to 1.0, with both transects on the flank showing lower values than other transects along the study area.
3 The Shannon index of evenness was calculated with the formula E = H/ln(S), where H is the Shannon diversity index and S is the total number of sequences in that group.
Despite the fact that variations were observed in the indices of evenness, diversity and population sizes of bacteria, fungi and archaea with different Cry1Ac addition rates up to 100 ng g−1 soil, the indices of soil microbial diversities and evennesses did not significantly shift with Cry1Ac protein addition, nor did population sizes change over time.
The value of the Shannon Index (H′) of diversity and Simpson index (D) of evenness of methanogen mcrA clone libraries decreased along the salinity gradient from freshwater to brackish water.
Open image in new window Fig. 4 Box-plot showing the mean and standard deviation of the Shannon Wiener diversity index and evenness of zooplankton in the three environments that comprise the Llancanelo-wetland system.
As for landscape indices, the area of average patches, value of aggregation index, clump index and diversity index all increased, indicating the trend of evenness for the whole ecosystems.
The R software (version 2.14.2; R Development Core Team 2009) was used to calculate the Shannon-Wiener index, Simpson's Diversity index, and Evenness index of each sample [ 30].
As for example, majority area (36%%) of Black/Aleppo Pine forest belongs to medium evenness class of the map where average value of Shannon evenness index of the field samples is also of medium level (0.67).
Both thermophilic and mesophilic bacterial community shared similar level of evenness (Shannon index, Additional file 1: Figure S2a, S2b), while the archaeal community of the mesophilic reactor (Shannon index, Additional file 1: Figure S2d) showed a lower level of evenness than the thermophilic reactor (Shannon index, Additional file 1: Figure S2c).
Our tests show that, among five proposed indicators for measuring degrees of evenness, Atkinson Index (AI) with weighted parameter of 0.1 is relatively the most stable indicator.
