MANGROVE OYSTERS (Crassostrea Brasiliana) AS BIOMONITORS TO ASSESS METAL CONTAMINATION IN A MACRO-TIDAL ESTUARY ON THE AMAZONIAN EQUATORIAL COAST

MANGROVE OYSTERS (Crassostrea Brasiliana) AS BIOMONITORS TO ASSESS METAL CONTAMINATION IN A MACRO-TIDAL ESTUARY ON THE AMAZONIAN EQUATORIAL COAST

With increasing recognition of the importance of biomonitoring in tropical estuaries, this study investigates the potential of oysters in assessing environmental contamination. This study assessed the mangrove oyster Crassostrea brasiliana as a biomonitor of estuarine contamination by metals (Al, Fe...

Full description

Saved in:
Bibliographic Details
Main Authors: Jacyara N. Correa, Thamires A. Torres, Daniel R. L. Brito, Samantha E. Martins, Carlos Eduardo de Rezende, Francisco J. S. Dias, Marco Valério J. Cutrim, Ricardo Luvizotto-Santos, Marianna B. Jorge
Format: Article
Language:English
Published: Sociedade Brasileira de Química 2025-06-01
Series:Química Nova
Subjects:
bioavailability
biomonitoring
Bivalvia
Crassostrea gasar
toxicity
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422025000500313&lng=en&tlng=en
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:With increasing recognition of the importance of biomonitoring in tropical estuaries, this study investigates the potential of oysters in assessing environmental contamination. This study assessed the mangrove oyster Crassostrea brasiliana as a biomonitor of estuarine contamination by metals (Al, Fe, Mn, Zn, Cu, Pb, Cd, Cr) in the Paciência river estuary on the Amazonian Equatorial coast. Oysters were collected across varying salinity gradients and seasons (dry and rainy). Results revealed seasonal and spatial fluctuations in water quality parameters. In situ measurements were taken to determine the environmental parameters of surface and bottom water, including salinity, temperature, and dissolved oxygen (DO). Oysters accumulated higher levels of Al, Fe, and Zn under low salinity conditions, while Cr, Cu (dry season), and Pb (rainy season) bioaccumulation increased with lower salinity and pH. Chromium and Zn bioaccumulations often exceeded Brazilian health standards, and a hazard index indicated potential health risks from consuming oysters from all sampling sites. Analysis of oysters from different regions showed that metal bioaccumulation is a widespread environmental challenge. This study highlights the effectiveness of C. brasiliana as a bioindicator for monitoring estuarine metal contamination.
ISSN:1678-7064

Similar Items