Tire wear particles (TWP) are both abundant and potentially toxic types of microplastic (MP) in the coastal ocean. We tested the effects of TWP type (new tires, old tires, rubber granules from artificial turfs) and concentration (10–10,000 TWP L⁻¹) on feeding, reproduction and fecal pellet production of two common coastal copepods at high (400 μg C L⁻¹) and low (40 μg C L⁻¹) food concentration consisting of a cryptophyte Rhodomonas sp. We did not observe any effect of TWP on copepods at environmentally relevant concentrations of <10 TWP L⁻¹. At TWP concentrations that were >100 times higher than the MP concentrations measured in coastal waters, food concentration, copepod feeding mode, TWP concentration and TWP type interacted to influence copepod feeding and pellet production, while reproduction was unaffected. Our results suggest that TWP at the current measured concentrations in the ocean environment is not likely to be a threat to the common coastal copepods.

在沿海海洋中，轮胎磨损颗粒（TWP）既是大量的，也是潜在有毒的微塑料（MP）类型。我们测试了TWP类型（新轮胎，旧轮胎，人造草皮的橡胶颗粒）和浓度（10–10,000 TWP L ^-1）对高（400μgCL ）两种常见沿海co足类动物的摄食，繁殖和粪便颗粒产生的影响。^-1）和低浓度（40μgCL ^-1）的食物浓度，由隐生菌Rhodomonas sp。组成。在与环境相关的浓度小于10 TWP L ^{-1的情况下，}我们没有观察到TWP对co足类动物的任何影响。在TWP浓度比沿海水域测得的MP浓度高100倍以上时，食物浓度，co足类动物的摄食模式，TWP浓度和TWP类型相互影响，影响co足类动物的摄食和颗粒生产，而繁殖则不受影响。我们的研究结果表明，当前在海洋环境中测得的浓度下的TWP不可能对常见的沿海co足类动物构成威胁。