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Assessment of water quality in coastal waters of Fernando de Noronha, Brazil; biomarker analyses in Amphistegina lessonii

Martina de Freitas Prazeres, Samantha Eslava Martins and Adalto Bianchini
Assessment of water quality in coastal waters of Fernando de Noronha, Brazil; biomarker analyses in Amphistegina lessonii
Journal of Foraminiferal Research (January 2012) 42 (1): 56-65

Abstract

Symbiont-bearing foraminiferal assemblages from reef environments have proven useful as ecological indicators for water quality. Studies with other organisms have utilized cellular biomarkers to elucidate mechanisms of stress response. Our goal was to combine these approaches, focusing on populations of the symbiont-bearing foraminifer Amphistegina lessonii from Fernando de Noronha Archipelago (northeastern Brazil). Reef-rubble samples containing A. lessonii were collected at five sampling sites on the leeward side of the main island. Three sites were located inside and two outside the Fernando de Noronha National Marine Park (FNNMP) area. Foraminifers were evaluated regarding their density, degree of bleaching, antioxidant capacity against peroxyl radicals (ACAP), lipid peroxidation (LPO), protein carbonylation (PC), and concentrations of metallothionein-like proteins (MTs). Densities of A. lessonii were lower at sites located outside the FNNMP, compared with those inside the FNNMP, where the maximum average was 159+ or -29 individuals/100 cm (super 2) . In individuals from sites located outside FNNMP, bleaching frequency reached 25%, though <2%; at FNNMP sites (<1.8%;). ACAP was higher (two-fold) in individuals collected at the FNNMP sites, which showed lower LPO and PC levels. MTs concentration did not differ significantly among sites. Zinc, copper, and lead concentrations were very high at stations located outside FNNMP. Dissolved organic carbon concentration was high at all sampling sites. Redundancy analysis revealed a strong correlation between biomarkers and water quality among sampling sites. These results show that the biomarker approach would be effective in identifying impacted areas and underlying causes, providing a reliable diagnostic for environment health.


ISSN: 0096-1191
EISSN: 1943-264X
Coden: JFARAH
Serial Title: Journal of Foraminiferal Research
Serial Volume: 42
Serial Issue: 1
Title: Assessment of water quality in coastal waters of Fernando de Noronha, Brazil; biomarker analyses in Amphistegina lessonii
Affiliation: Universidade Federal do Rio Grande, Instituto de Ciencias Biologicas, Rio Grande, Brazil
Pages: 56-65
Published: 201201
Text Language: English
Publisher: Cushman Foundation for Foraminiferal Research, Ithaca, NY, United States
References: 47
Accession Number: 2012-016476
Categories: Environmental geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sketch map
S03°52'00" - S03°49'60", W32°28'00" - W32°23'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Cushman Foundation for Foraminiferal Research. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201209
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