Figure 2: Fine-root N and P stoichiometry among ecosystem types.
From: Global-scale latitudinal patterns of plant fine-root nitrogen and phosphorus
(a) Fine-root N concentration, (b) Fine-root P concentration, (c) Fine-root N:P ratio. One-way analysis of variance is used to test the differences among BF, TEF, TRF, TEG, TRG, TU, deserts (DE) and wetlands (WE). The numbers in the figures are sample sizes for respective ecosystem types. The box plots summarize the distribution of points for each variable and group. The central box in each box plot shows the inter-quartile range, median (horizontal line in the box), 10th and 90th percentiles (lower and upper error bars) and individuals in the lower 10th percentiles (solid circles) for each group. BF, boreal forests; TEF, temperate forests; TEG, temperate grasslands; TRF, tropical forest; TRG, tropical grasslands; TU, tundra.
