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Comparisons of (A) the diversity indices, (B) the principal coordinate analysis based on the Bray–Curtis distance, and (C) the niche breadth of the whole protistan community. Different letters (a, b, c) indicate significant difference based on a least significant difference (LSD) test (p < 0.05). BL: original tailings from bare land, BC: tailings of biological crusts, and MS: tailings from the Miscanthus sinensis rhizosphere.
