Spatial distribution of tree species in evergreen-deciduous broadleaf karst forests in southwest China.

There was a clear trend that aggregation intensity declined with species abundance (Spearman’s rho = −0.580, p < 0.01): rare species (<4 individuals/ha, n = 43, mean = 33.16, SE = 4.3) were more aggregated than intermediate (4–40 individuals/ha, n = 78, mean = 18.5, SE = 2.48) and abundant species ( ≥ 40 individuals/ha, n = 24, mean = 7.6, SE = 1.06).

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