In the last decades, the use of organic ultraviolet-filters (UV-filters) has increased worldwide, and these compounds are now considered emerging contaminants of many freshwater ecosystems. The present study aimed to assess the effects of 3-(4-methylbenzylidene) camphor (4-MBC) on a freshwater invertebrate community and ecological functions. For that, artificial streams were used, and a natural invertebrate benthic community was exposed to sediments contaminated with two concentrations of 4-MBC. Effects were evaluated regarding macroinvertebrate abundance and community structure, as well as leaf decomposition and primary production as a proxy for ecological functions. Results showed that the macroinvertebrates community parameters and leaf decomposition rates were not affected by 4-MBC exposure. On the other hand, primary production was strongly reduced. This study highlights the importance of higher tier ecotoxicity experiments for the assessment of the effects of low concentrations of organic UV-filters on community structure and ecosystem functioning.

在过去的几十年中，有机紫外线过滤器（UV过滤器）的使用在全世界范围内有所增加，这些化合物现在被认为是许多淡水生态系统的新兴污染物。本研究旨在评估3-（4-甲基亚苄基）樟脑（4-MBC）对淡水无脊椎动物群落和生态功能的影响。为此，使用了人工流，并使自然的无脊椎动物底栖生物群落暴露于受两种浓度的4-MBC污染的沉积物中。评估了大型无脊椎动物的丰度和群落结构，以及叶片分解和初级生产作为生态功能的代表的影响。结果表明，大无脊椎动物群落参数和叶片分解速率不受4-MBC暴露的影响。另一方面，初级生产大大减少。这项研究强调了更高级别的生态毒性实验对于评估低浓度有机紫外线过滤剂对群落结构和生态系统功能的影响的重要性。