Ockenden Amy, Mitrano Denise M, Kah Melanie, Tremblay Louis A, Simon Kevin S
School of Environment, The University of Auckland, Science Centre, Building 302, 23 Symonds Street, Auckland CBD, Auckland, 1010 New Zealand.
ETH Zurich, Department of Environmental Systems Science, Universitatstrasse 16, Zurich, 8092 Switzerland.
Microplast nanoplast. 2024;4(1):20. doi: 10.1186/s43591-024-00096-4. Epub 2024 Oct 9.
Predicting the response of aquatic species to environmental contaminants is challenging, in part because of the diverse biological traits within communities that influence their uptake and transfer of contaminants. Nanoplastics are a contaminant of growing concern, and previous research has documented their uptake and transfer in aquatic food webs. Employing an established method of nanoplastic tracking using metal-doped plastics, we studied the influence of biological traits on the uptake of nanoplastic from water and diet in freshwater predators through two exposure assays. We focused on backswimmers () and damselfly larvae () - two freshwater macroinvertebrates with contrasting physiological and morphological traits related to feeding and respiration strategies. Our findings reveal striking differences in nanoplastic transfer dynamics: damselfly larvae accumulated nanoplastics from water and diet and then efficiently eliminated 92% of nanoplastic after five days of depuration. In contrast, backswimmers did not accumulate nanoplastic from either source. Differences in nanoplastic transfer dynamics may be explained by the contrasting physiological and morphological traits of these organisms. Overall, our results highlight the importance and potential of considering biological traits in predicting transfer of nanoplastics through aquatic food webs.
The online version contains supplementary material available at 10.1186/s43591-024-00096-4.
预测水生物种对环境污染物的反应具有挑战性，部分原因是群落中存在多样的生物学特性，这些特性会影响它们对污染物的吸收和转移。纳米塑料是一种日益受到关注的污染物，先前的研究已记录了它们在水生食物网中的吸收和转移情况。我们采用一种利用金属掺杂塑料进行纳米塑料追踪的既定方法，通过两项暴露试验研究了生物学特性对淡水捕食者从水和食物中摄取纳米塑料的影响。我们重点研究了仰泳蝽（）和豆娘幼虫（）——两种淡水大型无脊椎动物，它们在与摄食和呼吸策略相关的生理和形态特征上存在差异。我们的研究结果揭示了纳米塑料转移动态的显著差异：豆娘幼虫从水和食物中积累纳米塑料，然后在净化五天后能有效消除92%的纳米塑料。相比之下，仰泳蝽从这两种来源都不会积累纳米塑料。纳米塑料转移动态的差异可能由这些生物不同的生理和形态特征来解释。总体而言，我们的结果凸显了在预测纳米塑料通过水生食物网的转移过程中考虑生物学特性的重要性和潜力。
在线版本包含可在10.1186/s43591-024-00096-4获取的补充材料。
