Microplastics in the environment can impact feeding and physiological functions of organisms. Most studies have focused on marine systems, and studies of lacustrine organisms are less common. We examined microplastic concentration in 72 gizzard shad and 24 largemouth bass from two agricultural reservoirs in the midwestern U.S.A. with differing shoreline development. Microplastics were found in 100% of the fish, with 1–49 No. Fish⁻¹, independent of shoreline development. Bass had higher concentrations overall than shad. For bass, microplastics were more concentrated in the guts rather than gills, but the opposite was the case for shad, suggesting that feeding guild may influence where microplastics accumulate in fishes. The prevalence and concentrations reported here are greater than reported in marine systems and higher than reported in riverine studies. Our results underscore the ubiquitous distribution of microplastics and suggest that lake ecosystems in agricultural landscapes may be particularly susceptible to microplastic contamination.

中文翻译：

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美国两个水库中两种鱼类的微塑性患病率

环境中的微塑料可以影响生物的摄食和生理功能。大多数研究都集中在海洋系统上，而湖泊生物的研究则较不普遍。我们检查了来自美国中西部两个农业水库，海岸线发育不同的72个g和24个大嘴鲈中的塑料含量。在100％的鱼中发现了微塑料，其中1-49号鱼^-1，独立于海岸线发展。低音的总体浓度高于concentrations鱼。对于鲈鱼，微量塑料更集中在肠道而不是腮中，但是对于d鱼则相反，这表明饲喂公会可能会影响鱼类中微量塑料的积累。此处报道的流行率和浓度高于海洋系统中报告的浓度，也高于河流研究中报告的浓度。我们的结果强调了微塑料的普遍分布，并表明农业景观中的湖泊生态系统可能特别容易受到微塑料污染的影响。