Organic enrichment due to human impact is one of the major threats that affect benthic communities in semi-enclosed marine ecosystems, such as the Mediterranean Sea. However, many emerging sources of organic pollutants, such as those released to nature through human practices related to esthetics and cosmetics, remain underestimated, despite being an increasingly important source of organic matter input following a decade of expansion by the cosmetic industry. Therefore, an experiment was designed to explore the influence of collagen, the main component of commercialized skin anti-aging products, on a Mediterranean community of free-living marine nematodes from a beach in Rimel, northeast Tunisia. The effects of exposure for 30 days to a control treatment and three test treatments, corresponding to three levels of sedimentary enrichment with collagen (3, 6, and 12 ppm dry weight (DW)), were examined using a microcosm approach. Reductions in abundance and diversity were noted with an increase in collagen enrichment, together with a slight increase in individual weight. The presence of three species characteristic of control microcosms, Ptycholaimellus ponticus, Theristus modicus, and Kraspedonema reflectans, was clearly affected at the lowest dose; these were therefore classified as "collagen-sensitive." In contrast, the numbers of "collagen-tolerant" species, including Sigmophoranema rufum, Lauratonema hospitum, Enoploides spiculohamatus, and Trichotheristus mirabilis, increased significantly in the treated microcosms.

中文翻译：

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实验室生物测定法探讨抗衰老护肤产品对自由活动的海洋线虫的影响：胶原蛋白的案例研究。

由于人类影响而产生的有机物富集是影响半封闭海洋生态系统（例如地中海）底栖生物群落的主要威胁之一。然而，尽管在化妆品行业发展了十年之后，有机污染物的输入变得越来越重要，但许多新兴的有机污染物源（例如通过人类与美学和化妆品相关的做法释放给自然界的污染物）仍被低估了。因此，设计了一个实验来研究胶原蛋白（商品化的皮肤抗衰老产品的主要成分）对突尼斯东北部Rimel海滩上的地中海自由活动性线虫线虫的影响。暴露于对照治疗和三种测试治疗30天的影响，使用缩影方法检查了对应于三个水平的胶原蛋白沉积富集（3、6和12 ppm干重（DW））。随着胶原蛋白富集的增加以及个体体重的轻微增加，人们注意到其丰度和多样性的降低。在最低剂量下，明显存在影响对照微观世界的三种物种，即Ptycholaimellus ponticus，Theristus modicus和Kraspedonema Reflectionans。因此，这些被归类为“对胶原蛋白敏感”。相反，在处理过的微观世界中，“耐胶原蛋白”物种的数量显着增加，包括Sigmophoranema rufum，Lauratonema hospitum，Enoploides spiculohamatus和Trichotheristus mirabilis。随着胶原蛋白富集的增加以及个体体重的轻微增加，人们注意到其丰度和多样性的降低。在最低剂量下，明显存在影响对照微观世界的三种物种，即Ptycholaimellus ponticus，Theristus modicus和Kraspedonema Reflectionans。因此，这些被归类为“对胶原蛋白敏感”。相比之下，在处理过的微观世界中，“耐胶原蛋白”物种的数量显着增加，包括Sigmophoranema rufum，Lauratonema hospitum，Enoploides spiculohamatus和Trichotheristus mirabilis。随着胶原蛋白富集的增加以及个体体重的轻微增加，人们注意到其丰度和多样性的降低。在最低剂量下，明显存在影响对照微观世界的三种物种，即Ptycholaimellus ponticus，Theristus modicus和Kraspedonema Reflectionans。因此，这些被归类为“对胶原蛋白敏感”。相反，在处理过的微观世界中，“耐胶原蛋白”物种的数量显着增加，包括Sigmophoranema rufum，Lauratonema hospitum，Enoploides spiculohamatus和Trichotheristus mirabilis。在最小剂量下，Theristus modicus和Kraspedonema Reflectionans受到明显影响。因此，这些被归类为“对胶原蛋白敏感”。相反，在处理过的微观世界中，“耐胶原蛋白”物种的数量显着增加，包括Sigmophoranema rufum，Lauratonema hospitum，Enoploides spiculohamatus和Trichotheristus mirabilis。在最小剂量下，Theristus modicus和Kraspedonema Reflectionans受到明显影响。因此，这些被归类为“对胶原蛋白敏感”。相反，在处理过的微观世界中，“耐胶原蛋白”物种的数量显着增加，包括Sigmophoranema rufum，Lauratonema hospitum，Enoploides spiculohamatus和Trichotheristus mirabilis。