PET microplastics toxicity on marine key species is influenced by pH, particle size and food variations.,Science of the Total Environment

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PET microplastics toxicity on marine key species is influenced by pH, particle size and food variations.
Science of the Total Environment ( IF 8.2 ) Pub Date : 2020-01-25 , DOI: 10.1016/j.scitotenv.2020.136947
Manuela Piccardo ₁ , Francesca Provenza ₂ , Eleonora Grazioli ₂ , Andrea Cavallo ₃ , Antonio Terlizzi ₁ , Monia Renzi ₂

Affiliation

This study aims to evaluate effects induced by the exposure of key marine species to leachates and suspensions of different particle-size of PET microparticles, a plastic polymer that is actually considered safe for the environment. Leachates and suspensions of small (5-60 μm); medium (61-499 μm) and large (500-3000 μm) PET were tested on bacteria (V. fischeri; UNI EN ISO 11348-3:2009), algae (P. tricornutum; UNI EN ISO 10253:2016E), and echinoderms (P. lividus; EPA 600/R-95-136/Section 15) species both under standard (8.0) and acidified (7.5) pH conditions. Results obtained show that: i) conversely to larval stage of P. lividus, bacterial and algal tested species are not sensitive to PET pollution under all tested conditions; ii) different tested particle-sizes of PET produce effects that are not always related to their particle-size; iii) differences comparing acidified and standard pH conditions were recorded; iv) concerning echinoderms, food availability produce significant differences compared to fasting conditions; v) special attention on the possible interactions between MPs and other stressors (e.g., food and pH) is needed in order to give a better picture of natural occurring dynamics on marine ecosystems especially in the future frame of global changes.

中文翻译：

PET微塑料对海洋关键物种的毒性受pH，粒度和食物变化的影响。

这项研究旨在评估关键海洋物种暴露于不同粒径的PET微粒（一种实际上被认为对环境安全的塑料聚合物）的浸出液和悬浮液所引起的影响。小的渗滤液和悬浮液（5-60μm）；在细菌（V. fischeri; UNI EN ISO 11348-3：2009），藻类（P. tricornutum; UNI EN ISO 10253：2016E）和细菌上测试了中等（61-499μm）和大型（500-3000μm）PET在标准（8.0）和酸化（7.5）pH条件下的棘皮动物（P. lividus; EPA 600 / R-95-136 / Section 15）物种。获得的结果表明：i）相反地，在青霉幼虫的幼虫阶段，细菌和藻类检测的物种在所有检测条件下都不对PET污染敏感；ii）不同测试的PET粒径产生的效果并不总是与其粒径相关；iii）记录酸化和标准pH条件之间的差异；iv）就棘皮动物而言，食物供应与禁食条件相比有显着差异；v）需要特别注意国会议员与其他压力源（例如食物和pH）之间可能的相互作用，以便更好地了解海洋生态系统的自然动态，尤其是在全球变化的未来框架中。

更新日期：2020-01-26

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