Cited by 10Environmental Toxicology and EcotoxicologyCarcinogens and Genotoxicity AssessmentAmphibian and Reptile Biology

The DOI matches its Crossref record; 60 of the 60 references it cites were found in a registry or an index.

Genotoxic risk assessment of solar UV radiation in tadpoles from Brazilian wetlands

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Santos, Maurício Beux dos, Londero, James Eduardo Lago, Mainardi, Álvaro Augusto, Cechin, Sonia Zanini, Schuch, André Passaglia·2023·Mutation Research/Genetic Toxicology and Environmental Mutagenesis

Abstract

Solar ultraviolet (UV) radiation is an environmental genotoxic factor linked to amphibian decline. Here we assessed the genotoxic risk of UVB and UVA exposure for tadpoles from open ponds in southern Brazil, a mid-latitude region influenced by stratospheric ozone depletion. Daily UV doses were measured on the surface of a pond in Taim Ecological Station (TAIM; 32°49'24''S; 52°38'31''W) on a cloudless summer day to predict the worst-case scenario for UV-induced DNA damage. Pond descriptors were related to the use of microhabitats by Boana pulchella tadpoles in two ponds over the climate seasons of 2013 and 2014. Our results indicate that shaded microhabitats were more frequent than unshaded ones in autumn, winter, and spring but not in summer. Hence, the penetration of UV radiation into the water of unshaded microhabitats was evaluated through laboratory experiments with artificial UV sources and pond water samples. Physical and biological sensors were applied in the experiments to measure the incident UV radiation and its genotoxic action. By integrating field and laboratory data, we demonstrate that low doses of biologically effective UV radiation reached the tadpoles in autumn, winter, spring, and early summer due to a high proportion of shaded microhabitats and a high concentration of solids in unshaded microhabitats. However, the relative reduction of shaded microhabitats jointly with a declining water level in late summer may have exposed tadpoles to high UV doses. Our experiments also indicate that solar UVB radiation, but not UVA, is primarily responsible for the induction of DNA pyrimidine dimers in organisms living under the surface of aquatic ecosystems. The present work highlights the determinant role of wetland descriptors for minimizing the genotoxic potential of UV radiation and its consequences for amphibians.

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Crossref · 10.1016/j.mrgentox.2022.503578

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Metadata

Authors
Santos, M. B. D., Londero, J. E. L., Mainardi, Á. A., Cechin, S. Z., & Schuch, A. P.
Affiliations
Universidade Federal de Santa Maria (BR)
Venue
Mutation Research/Genetic Toxicology and Environmental Mutagenesis
Publisher
Elsevier BV
Published
2023-01
Volume
885
Pages
503578
ISSN
1383-5718 (ISSN-L)
OpenAlex
W4312083239
Cited by
10
References
60
Citations by year
2026: 2 · 2025: 3 · 2024: 3 · 2023: 2
FWCI
0.79
Type
journal article
Language
en
Open access
Locations
  • Mutation Research/Genetic Toxicology and Environmental Mutagenesis (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (23038, #23038.004173/2019‐93, 2018-0)
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (2018-0, 407103/2018‐0, 304870/2021-8, 2018-6, 307063/2018-6)
  • Instituto Chico Mendes de Conservação da Biodiversidade
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Carcinogens and Genotoxicity Assessment
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Amphibian and Reptile Biology
Keywords
solar ultraviolet radiation, UV-B radiation, UVA, genotoxic risk, tadpoles, Boana pulchella, amphibian decline, UV-induced DNA damage, wetland water quality, stratospheric ozone depletion, seasonal variation, water level decline, Taim Ecological Station
MeSH terms
Amphibians, Animals, Brazil, DNA Damage, Larva, Ultraviolet Rays, Water, Ecosystem, Risk Assessment, Wetlands

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