Metal accumulation induces oxidative stress and alters carbonic anhydrase activity in corals and symbionts from the largest reef complex in the South Atlantic ocean

Juliana Lemos Dal Pizzol, Joseane Aparecida Marques, Juliana da Silva Fonseca, Patrícia Gomes Costa, Adalto Bianchini

Research output: Contribution to journalArticlepeer-review

Abstract

We evaluated the influence of metal accumulation on the oxidative status [lipid peroxidation (LPO) and total antioxidant capacity (TAC)] and carbonic anhydrase (CA) activity in host and symbionts of the coral Mussismilia harttii and the hydrocoral Millepora alcicornis collected in Abrolhos Reef Banks (Northeast Brazil), potentially impacted by a major mine dam rupture. Considering metal levels measured in reefs worldwide, Abrolhos corals had higher Fe and Mn levels than expected for preserved offshore reefs. Increasing concentrations of arsenic (As), chromium (Cr) and manganese (Mn) drove inhibition of CA and increased oxidative damage in the hydrocoral M. alcicornis. The impairment of enzymatic activity in the symbiotic algae of M. alcicornis may be related to the oxidative stress condition. The hydrocoral M. alcicornis was more affected by metals than the coral M. harttii, which did not show the expected CA inhibition after metal exposure. Our results suggest that CA activity can be applied as a complementary biomarker to evaluate the physiological impacts of environmental metal contamination in reefs. Also, the metal levels and biochemical biomarkers reported in the present study may provide reference data to monitor the health of reefs impacted by a relevant dam rupture.

Original languageEnglish
Article number133216
JournalChemosphere
Volume290
DOIs
StatePublished - 1 Mar 2022
Externally publishedYes

Keywords

  • Abrolhos banks
  • Carbonic anhydrase
  • Dam rupture
  • Lipid peroxidation
  • Mariana disaster
  • Total antioxidant capacity

ASJC Scopus subject areas

  • Environmental Engineering
  • Chemistry (all)
  • Environmental Chemistry
  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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