Fig. 3: Comparison of single-GCF and GCF-number effects on species diversity of sown and transplanted-seedling communities. | Nature Communications

Fig. 3: Comparison of single-GCF and GCF-number effects on species diversity of sown and transplanted-seedling communities.

From: Number of simultaneously acting global change factors affects composition, diversity and productivity of grassland plant communities

Fig. 3

Species diversity and evenness of transplanted-seedling (a, c) and sown (b, d) grassland communities exposed to different single-GCF treatments (black circles) and to different numbers of simultaneously acting GCFs (red circles). Species diversity was quantified as Shannon index (a, b) and as evenness (c, d) based on the proportional biomass of the species. In both community types, both species diversity and evenness were significantly reduced by GCF number while there were no effects of the single-GCF treatments (Supplementary Tables 3 and 4). Black and red circles represent model estimates for the single-GCF and GCF-number effects, respectively. Error bars represent standard errors. Light blue circles represent raw data distribution. N = 6 for all single-GCF treatments, control and GCF-number level 6, respectively. N = 36 for GCF-number levels 1, 2, 4, respectively. Asterisks indicate the significance of individual factors (*p < 0.05; **p < 0.01; ***p < 0.001). General GCF-treatment and GCF-number effects were assessed with log-likelihood ratios (χ2 or F statistics). Effects of the individual GCFs were assessed by two-sided t tests. We did not make adjustments for multiple comparisons.

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