Programa de Pós-graduação em Desenvolvimento e Meio, Ambiente da Universidade Federal do Rio Grande do Norte, Brazil.
Programa de Pós-graduação em Desenvolvimento e Meio, Ambiente da Universidade Federal do Rio Grande do Norte, Brazil; Programa de Pós-graduação em Uso Sustentável de Recursos Naturais do Instituto Federal do Rio Grande do Norte, IFRN, Brazil.
Mutat Res Genet Toxicol Environ Mutagen. 2021 May;865:503346. doi: 10.1016/j.mrgentox.2021.503346. Epub 2021 Mar 4.
High natural-background radioactivity levels occur in the semi-arid region of the State of Rio Grande do Norte, northeastern Brazil. We have studied the lizard Phyllopezus periosus, an endemic species of the Brazilian caatinga with saxicolous habitat, as a bioindicator of environmental quality. Specimens were collected in three areas, an environmental protection area and two areas recognized as having high natural background radiation, one of these being a mining area. Level of metals and gamma radiation emitters present in the water sources potentially used by the lizards were measured. The biological endpoints assessed were micronuclei and nuclear abnormalities in blood samples. Significant differences in background radioactivity levels were found among the assessed areas. Statistically significant differences in micronuclei and nuclear abnormality frequencies were seen, among the study areas and a relationship between radioactivity level and genetic damage was observed.
巴西东北部北大西洋沿岸的北大河州的半干旱地区存在高天然本底放射性。我们以栖息在石头上的石生蜥蜴为生物指标，研究了该地区的环境质量。我们在三个地区收集了标本，一个是自然保护区，另外两个地区天然本底辐射较高，其中一个是矿区。测量了蜥蜴潜在用水水源中的金属和放射性伽马辐射物水平。评估的生物学终点是血液样本中的微核和核异常。在所评估的区域中，背景放射性水平存在显著差异。在所研究的地区之间，微核和核异常频率存在统计学上的显著差异，并且观察到放射性水平与遗传损伤之间存在关系。
