middle-upper portion of Paraguaçu and the upper portion of Subae. A. schaueriana showed higher basal area values in lower estuarine zones and did not occur at the upper zones of Jaguaripe and Paraguaçu. This latter species had very low basal area values at Paraguaçu estuary and tended to be a co-dominant spe- cies at lower and intermediate portions of Subae estuary.