analysis we used the STATISTICA 6.0. The spatial
distribution of the most abundant species (abundance greater
than 2%) in relation to abiotic factors with spatial variation
(P < 0.05) was assessed by Pearson correlation analysis and
visualized by a principal components analysis (PCA), using
the PRIMER v5. Data on the number of individuals were
previously transformed by log (x+1). For all analyses, we
used the 95% significance level