Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Santos, Brazil.
Centro de Desenvolvimento de Materiais Funcionais (CDMF), Departamento de Química, Universidade Federal de São Carlos (UFSCar), São Carlos, Brazil.
Chemosphere. 2022 Nov;307(Pt 2):135926. doi: 10.1016/j.chemosphere.2022.135926. Epub 2022 Aug 4.
Morphological, structural and compositional alterations in shells of molluscs have been proposed as putative biomarkers of chemical contamination in coastal zones. Despite this, few studies were carried out using top predator gastropods which tend to be more susceptible to contamination exposure. Thus, the present study assessed disturbances on shells of Stramonita brasiliensis considering compression resistance and organic and mineralogical matrix composition, related to morphometric alterations. Results showed reductions in compression resistance and organic matrix content associated with higher contaminated sites. In addition, a predominance of calcite polymorphs was seen in shells obtained in polluted areas. Such outputs were consistent with local contamination levels which may have induced the observed alterations. Thus, changes in mollusc shells showed good performance as potential biomarkers of coastal contamination, being probably observed in other species of carnivorous gastropods around the world.
贝类壳的形态、结构和成分变化已被提出作为沿海地区化学污染的潜在生物标志物。尽管如此，使用倾向于更容易受到污染暴露的顶级捕食性腹足类动物进行的研究很少。因此，本研究评估了 Stramonita brasiliensis 壳的干扰，考虑了抗压强度和与形态计量变化相关的有机和矿物基质组成。结果表明，与污染程度较高的地区相比，抗压强度和有机基质含量降低。此外，在污染地区获得的壳中发现了方解石多晶型物的优势。这些结果与当地的污染水平一致，这可能导致了观察到的变化。因此，软体动物壳的变化作为沿海污染的潜在生物标志物表现良好，可能在世界各地的其他肉食性腹足类动物中也有观察到。
