Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 106, Issue 2, Pages 355-362Publisher
SPRINGER
DOI: 10.1007/s00128-020-03076-5
Keywords
Sediment quality; Geochemical and toxicity analyses; Legally protected reserves; Differential metal contamination; Sã o Paulo state coast
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Funding
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo [2011/22537-0]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico, Brazil [300662/2009-2, 308649/2011]
- [2011/08065-9]
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The study compared sediment quality in estuaries at three locations along the coast of Sao Paulo State, Brazil, during two seasons of 2013. Results showed that sediments from the most protected locality had lower metal pollution and toxicity compared to those from less protected areas, which exhibited signs of environmental degradation.
We compared sediment quality in estuaries at three locations along the coast of Sao Paulo State, Brazil, using geochemical analyses and whole sediment toxicity tests, during the southern summer and winter of 2013. Each locality is afforded a distinct degree of legal protection, and exhibits a different level of metal pollution: overall, Rio Diana (RD, the most polluted, a Permanent Protection Area) > Rio Itapanhau (RI, intermediate contamination, an Environmental Protection Area) > Rio Picinguaba (RP, pristine, a State Park). Chronic sediment toxicity tests evaluated reproductive rates of the copepod Nitokra sp. RI sediments showed the highest metal concentrations and toxicity in both seasons. Metal concentrations at RD were low but toxic in summer. RP sediments were not contaminated, suggesting effective legal protection from pollution at this locality. RI and RD, although provided some legal protection, showed clear signs of environmental degradation, emphasizing the need for more effective pollution control.
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