The response of life history defense of cladocerans under predation risk varies with the size and concentration of microplastics
The response of life history defense of cladocerans under predation risk varies with the size and concentration of microplastics
复制标题
捕食风险下枝角动物的生活史防御反应随微塑料的大小和浓度而变化
DOI：
10.1016/j.jhazmat.2021.127913
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发表时间：
2022
影响因子：
13.6
通讯作者：
Zhou Yang
中科院分区：
文献类型：
--
作者：
Qi Liu;Leihong Liu;Jing Huang;Lei Gu;Yunfei Sun;Lu Zhang;Kai Lyu;Zhou Yang
微塑料是淡水环境中一种新兴且日益严重的污染物，已对淡水生物构成威胁。然而，微塑料是否会干扰生物对其捕食者的反应仍不清楚。在这项研究中，我们研究了不同粒径的微塑料（直径：0.7和1 µm）对不同体型的枝角类，水蚤pulex和多刺裸腹蚤的抗捕食（Rhodeus ocellatus作为捕食者）防御反应的影响。结果表明，微塑料对两种诱导防御都有大小依赖的抑制作用。普勒斯和M. macrocopa。具体来说，0.7微米的微塑料对减少存活时间、延迟成熟时间和减少后代数量有更强的影响。此外，不同体型的枝角类，如中型枝角类（D. pulex）的敏感性高于小型蚤（M. macrocopa）关于成熟时间。该研究首次阐明了微塑料对诱导防御的影响与枝锈菌种类和微塑料大小有关，并从种间关系的角度进一步揭示了微塑料的广泛负面效应。
Microplastics are an emerging and increasingly serious pollutant in freshwater environment, which have become a threat to freshwater organisms. However, whether microplastics interfere with the responses of organisms to their predators is still unclear. In this study, we investigated the effects of microplastics with tiny different particle size (diameter: 0.7 and 1 µm) on the anti-predation (Rhodeus ocellatusas the predator) defense responses of different body-sized cladocerans,Daphnia pulexandMoina macrocopa. Results showed that microplastics had a size-based inhibitory effect on the induced defense of bothD. pulexandM. macrocopa. Specifically, 0.7 µm microplastics had stronger effects on reduced survival time, delayed maturation time, and decreased offspring numbers. In addition, the effects of microplastics also varied with different body-sized cladocerans, i.e. medium-sized cladoceran (D. pulex) were more sensitive than the small-sized one (M. macrocopa) regarding the maturation time. This study illustrated for the first time that the effect of microplastics on induced defense was related to cladoceran species and microplastics size, and further revealed the extensive negative effects of microplastics from the perspective of interspecific relationship.