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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Metal toxicity assessment by sentinel species of mangroves: In situ case study integrating chemical and biomarkers analyses

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de Almeida Duarte, Luis Felipe [1] ; de Souza, Caroline Araujo [1] ; Seabra Pereira, Camilo Dias [2, 3] ; Amaro Pinheiro, Marcelo Antonio [1]
Total Authors: 4
[1] UNESP Univ Estadual Paulista, Inst Biociencias IB, Lab Biol Crustaceos, Grp Pesquisa Biol Crustaceos CRUSTA), Campus Litoral Paulista CLP, BR-11330900 Sao Paulo - Brazil
[2] UNIFESP Univ Fed Sao Paulo, Dept Ciencias Mar, Campus Baixada Santista, BR-11030400 Santos, SP - Brazil
[3] Univ Santa Cecilia, Lab Ecotoxicol, UNISANTA, Rua Oswado Cruz 266, BR-11045900 Santos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Web of Science Citations: 7

Globally, there is a lack of knowledge about tropical ecotoxicology dealing with the potential impact of metal contamination in mangrove ecosystem. This habitat is considered a nursery for several animal species, among them the ``uca{''}-crab (Ucides cordatus), known as a key species due to its biological and economical importance. This study evaluated the association involving metal contamination (Cd, Cu, Pb, Cr, Mn and Hg) in water, sediment, red-mangrove vegetation (Rhizophora mangle) and tissues of uga crab, together with its geno-cytotoxic responses, based on micronucleated hemocytes frequency and the retention time of neutral red in lysosomes. We assessed six mangrove areas with distinct pollution levels in Sao Paulo State, Brazil, where the water and sediment contamination by metals were associated with accumulation of these pollutants in biotic compartments (mangrove leaves and crab). In U. cordatus, metal accumulation was best explained by metal concentration found in leaves of R. mangle than in the water or sediment, indicating that feeding drives metal exposure in this organism. Mercury (Hg) concentration in sediment, copper (Cu) concentration in hepatopancreas of U. cordnnic and lead (Pb) in water and green leaves of R. mangle showed a significant correlation with genotoxic impact in U. cordatus. However, copper concentration (in green/senescent leaves and hepatopancreas) and lead (in sediment), were the major metals affecting lysosomal membrane integrity. Therefore, representatives of all compartments were associated with cyto and genotoxicity in this species, thus requiring a holistic approach to issues related to sublethal damage. Probability estimates of cytogenetic impacts related to metal concentration in abiotic compartments (significantly correlated with known biomarkers: Hg in sediment; and Pb in water and sediment) are also presented. Our results highlight the need for environmental restoration of mangroves areas contaminated with metals, responsible for cytogenetic injuries and revealing a pre-pathological condition in this sentinel species, in addition to ecological disturbances. (AU)

FAPESP's process: 09/14725-1 - Project Uçá III - Genotoxic impact on population of uçá-crab, Ucides cordatus (Linnaeus, 1763) (Crustacea, Brachyura, Ucididae): evaluation and correlation with of heavy metal concentration in five mangroves of the São Paulo State
Grantee:Marcelo Antonio Amaro Pinheiro
Support Opportunities: Regular Research Grants
FAPESP's process: 10/01552-9 - Genotoxic impact on populations of the crab, Ucides cordatus (Linnaeus, 1763) (Crustacea, Brachyura, Ucididae), in five mangrove areas at São Paulo State, Brazil.
Grantee:Luis Felipe de Almeida Duarte
Support Opportunities: Scholarships in Brazil - Doctorate