Realistic environmental exposure to secondary PET microplastics induces biochemical responses in freshwater amphipod Hyalella azteca

IF 1.3 4区环境科学与生态学 Q3 ECOLOGY

Chemistry and Ecology Pub Date : 2022-12-27 DOI:10.1080/02757540.2022.2162046

L. G. Queiroz, B. Rani-Borges, C. Prado, Beatriz Rocha de Moraes, R. A. Ando, T. Paiva, Marcelo Pompêo

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引用次数: 1

Abstract

ABSTRACT Freshwater environments are especially susceptible to microplastic contamination due to their proximity to urbanised and industrial areas. Also, there is a lack of information about the effects of this pollutant on freshwaters making it difficult the conservation of these environments. Benthic species, such as the freshwater amphipod Hyalella azteca, have been superficially studied so far for evaluation of microplastic pollution. In the present study, we analyzed whether polyethylene terephthalate (PET) microplastics could lead to reduced survival of H. azteca or changes in biochemical markers (SOD, CAT, MDA, and GST) at environmentally relevant concentrations (60 and 600 particles) after 7 d of exposure. The results showed that there was no significant mortality at any of the concentrations tested. The enzyme CAT showed no variation compared to the control group at any of the concentrations. SOD, MDA, and GST were statistically different (p < 0.05). Our study demonstrated that PET MP did not affect the survival of H. azteca at environmentally relevant concentrations. However, changes in biomarkers of oxidative stress may be detected at low level of exposure (60 particles). Although survival is not affected, the macrobenthic invertebrate community may be under threat in environments where there is PET microplastic pollution.

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真实的环境暴露于二次PET微塑料诱导淡水片足类阿兹特克透明藻的生化反应

淡水环境特别容易受到微塑料污染，因为它们靠近城市化和工业区。此外，缺乏关于这种污染物对淡水的影响的信息，使这些环境的保护变得困难。底栖生物，如淡水片足类动物阿兹特克透明藻，迄今为止对微塑料污染评价的研究还很肤浅。在本研究中，我们分析了暴露7天后，聚对苯二甲酸乙二醇酯(PET)微塑料是否会导致H. azteca在环境相关浓度(60和600颗粒)下的存活率降低或生化标志物(SOD, CAT, MDA和GST)的变化。结果表明，在任何测试浓度下都没有明显的死亡率。与对照组相比，在任何浓度下，CAT酶都没有变化。SOD、MDA、GST差异有统计学意义(p < 0.05)。我们的研究表明，PET MP在环境相关浓度下不会影响H. azteca的存活。然而，在低水平的暴露(60个颗粒)下，氧化应激生物标志物的变化可能被检测到。虽然生存不受影响，但在PET微塑料污染的环境中，大型底栖无脊椎动物群落可能受到威胁。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemistry and Ecology 环境科学-环境科学

CiteScore

4.20

自引率

16.00%

发文量

审稿时长

3.7 months

期刊介绍： Chemistry and Ecology publishes original articles, short notes and occasional reviews on the relationship between chemistry and ecological processes. This journal reflects how chemical form and state, as well as other basic properties, are critical in their influence on biological systems and that understanding of the routes and dynamics of the transfer of materials through atmospheric, terrestrial and aquatic systems, and the associated effects, calls for an integrated treatment. Chemistry and Ecology will help promote the ecological assessment of a changing chemical environment and in the development of a better understanding of ecological functions.