Values of the asymmetrical similarity index (ASI) for the similarity among community types obtained by the TWINSPAN analysis. ASI = S(A and B)/SA (Eq. (1)). Boldfaced values: the
diagonal of the table represents the similarity between two sample plots stochastically resampled from within the same community type; underlined value are more than half of
the value on the diagonal in a column; italicized values are more than one-quarter of the value on the diagonal in a column. The area separated by dashed lines were used in t-test
for higher level classification.