Lipinski Victor Mendes, Santos Tiago Gomes Dos, Schuch André Passaglia
Federal University of Santa Maria, Post-Graduation Program of Animal Biodiversity, Av. Roraima s/n, building 17, room 1140, Camobi, 97105-900 Santa Maria, RS, Brazil.
Federal University of Santa Maria, Post-Graduation Program of Animal Biodiversity, Av. Roraima s/n, building 17, room 1140, Camobi, 97105-900 Santa Maria, RS, Brazil; Federal University of Pampa, Av. Antônio Trilha, 1847, Centro, 97300-000 São Gabriel, RS, Brazil.
J Photochem Photobiol B. 2016 Dec;165:174-181. doi: 10.1016/j.jphotobiol.2016.10.025. Epub 2016 Oct 24.
The Southern Atlantic rainforest is continuously suffering from wood extraction activity, which results in the increase of clearings within the forest. Although the direct impacts of deforestation on landscape are already well described, there is an absence of studies focused on the evaluation of its indirect effects, such as the increase of solar UV radiation levels inside forest environment and its consequences for forest specialist anuran species. The results presented in this work clearly show that the threatened tree frog species Hypsiboas curupi presents severe traits of sensitivity to UV wavelengths of sunlight, making it a vulnerable species to this environmental stressor, as well as a biological indicator of the quality of forest canopy coverage. In addition, the measurement of solar UVB and UVA radiation incidence upon H. curupi breeding site and the analyses of a 20-year dataset of satellite images regarding the management of canopy coverage indicate that the photoprotection provided by trees of the Southern Atlantic rainforest is critical for the conservation of this forest specialist anuran species. Therefore, this work demonstrates that the deforestation process enhances the exposure of H. curupi embryos to solar UVB and UVA radiation, negatively affecting their embryonic development, inducing mortality and population decline.
南大西洋雨林持续遭受木材采伐活动的影响，这导致森林内空地增加。尽管森林砍伐对景观的直接影响已有详尽描述，但缺乏专注于评估其间接影响的研究，比如森林环境中太阳紫外线辐射水平的增加及其对森林特有的无尾目物种的影响。这项工作呈现的结果清楚表明，濒危树蛙物种库鲁皮雨蛙对阳光的紫外线波长表现出严重的敏感特征，使其成为易受这种环境压力影响的物种，也是森林冠层覆盖质量的生物指标。此外，对库鲁皮雨蛙繁殖地的太阳UVB和UVA辐射入射量的测量，以及对20年卫星图像数据集关于冠层覆盖管理的分析表明，南大西洋雨林树木提供的光保护对这种森林特有的无尾目物种的保护至关重要。因此，这项工作表明，森林砍伐过程增加了库鲁皮雨蛙胚胎对太阳UVB和UVA辐射的暴露，对其胚胎发育产生负面影响，导致死亡和种群数量下降。
