Fig. 2: Global diversity and biogeography of diazotrophic communities across habitats.
From: Anthropogenic climate change may reduce global diazotroph diversity
a Latitudinal distribution of diazotroph relative richness in terrestrial and marine ecosystems, with colour variations indicating the mean annual temperature in each sample (terrene: two-sided Pearson correlation test, r(96,989) = −0.061, P = 2.73 × 10−80, t = −18.993, 95% CI = [−0.067, −0.055]; marine: two-sided Pearson correlation test, r(27,671) = −0.031, P = 2.85 × 10−7, t = −5.134, 95% CI = [−0.042, −0.019]). b Relative richness of diazotrophic communities across different habitats. The sample numbers are included in the label. c Principal coordinate analysis of diazotrophic community composition across various habitats, with the distance matrix generated using Bray-Curtis dissimilarity. d Proportions of stochastic processes of diazotrophic communities in different habitats. The box plots display the median (middle line) and the 25th (Q1) and 75th (Q3) percentiles (box boundaries), and the whiskers indicate the Q1 − 1.5 IQR and Q3 + 1.5 IQR of the observations. Each box summarizes statistical distributions derived from randomized subsampling iterations (n = 100) per habitat. Blue represents aquatic environments, and yellow indicates soil environments. Source data are provided as a Source Data file.
