Extended Data Fig. 5: Different measures of temporal change of plant diversity.
From: More losses than gains during one century of plant biodiversity change in Germany
The histograms show the interval comparisons of plot records between time points Y1 and Y2 of the start and end year, respectively. The black dashed line shows the zero change, while the red solid line shows the mean change as predicted from a mixed effects model. a) Change in Shannon’s index of diversity (H). Estimated mean effect size for H −0.055 (p = 2.2 x 10−16, df = 5,462, 95% confidence interval −0.064 and −0.047). b) Change in Pielou’s index of evenness (E). Estimated mean effect size for E −0.019 (p = 2.6 x 10−16, 95% confidence interval −0.024 and −0.015). c) Difference in the area under the rank abundance curves. Estimated mean difference −0.143 (p = 0.00211, 95% confidence interval −0.194 and −0.091). d) Difference in the number of cover gains and losses. Estimated mean difference −0.407 (p = 7.9 x 10−7, 95% confidence interval −0.569 and −0.246). e) Change in mean cover of all the species in a plot (in per cent covered ground). Estimated mean effect size for mean cover +0.025 (p = 1.0 x 10−10, 95% confidence interval +0.018 and +0.033). f) Change in median cover of all the species in a plot (per cent of covered ground). Estimated mean effect size for median cover −0.007 (p = 0.2984, 95% confidence interval −0.021 and +0.007).
