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Total carbon (a), total nitrogen (b), pH (c) chlorophylla (d), and chlorophylla+b contents (e) of different types of biocrusts plus bare soil. Boxes limit the 25th- and 75th percentile with the median presented as line and mean values marked as point inside. Error bars present the 1st and 99th percentile and outliers are shown as dots below and above. Significant differences (P < 0.05) are marked by different letters
