Local thermal adaption mediates the sensitivity of Daphnia magna to nanoplastics under global warming scenarios.

Autor: Xu W; Environment Research Institute, Shandong University, Qingdao 266237, China., Chang M; State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China., Li J; Environment Research Institute, Shandong University, Qingdao 266237, China., Li M; Environment Research Institute, Shandong University, Qingdao 266237, China., Stoks R; Evolutionary Stress Ecology and Ecotoxicology, KU Leuven, Leuven B-3000, Belgium., Zhang C; Environment Research Institute, Shandong University, Qingdao 266237, China. Electronic address: chaozhang@sdu.edu.cn.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2024 Sep 05; Vol. 476, pp. 134921. Date of Electronic Publication: 2024 Jun 13.
DOI: 10.1016/j.jhazmat.2024.134921
Abstrakt: The toxicity of nanoplastics at environmentally relevant concentrations has received widespread attention in the context of global warming. Despite numerous studies on the impact of mean temperature (MT), the effects of daily temperature fluctuations (DTFs) on the ecotoxicity of nanoplastics remains largely unexplored. Moreover, the role of evolutionary adaptation in assessing long-term ecological risks is unclear. Here, we investigated the effects of polystyrene nanoplastics (5 μg L -1 ) on Daphnia magna under varying MT (20 °C and 24 °C) and DTFs (0 °C, 5 °C, and 10 °C). Capitalizing on a space-for-time substitution approach, we further assessed how local thermal adaptation affect the sensitivity of Daphnia to nanoplastics under global warming. Our results indicated that nanoplastics exposure in general reduced heartbeat rate, thoracic limb activity and feeding rate, and increased CytP450, ETS activity and Hgb concentrations. Higher MT and DTFs enhanced these effects. Notably, clones originating from their respective sites performed better under their native temperature conditions, indicating local thermal adaptation. Warm-adapted low-latitude D. magna showed stronger nanoplastics-induced increases in CytP450, ETS activity and Hgb concentrations under local MT 24 °C, while cold-adapted high-latitude D. magna showed stronger nanoplastics-induced decreases in heartbeat rate, thoracic limb activity and feeding rate under high MT than under low MT.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: