数字农科院2.0

Effects of Cadmium Accumulation Along the Food Chain on the Fitness of Harmonia axyridis

文献类型： 外文期刊

作者： Shen, Qintian;Wang, Shasha;Wan, Sijing;Guan, Meiyan;Zhong, Fan;Zhao, Keting;Tao, Shiyu;Zhou, Min;Li, Yan;Zhang, Weixing;Tang, Bin

作者机构：

关键词： Harmonia axyridis;food chain;cadmium;growth and development;fertility

期刊名称： AGRONOMY-BASEL

ISSN：

年卷期： 2025 年 15 卷 5 期

页码：

收录情况： SCIE（2025版）

摘要： Heavy metal pollution, particularly cadmium (Cd) contamination in water and farmland, might accumulate in natural insect enemies through the food chain. In response to this heavy metal stress, natural enemy insects adapt by altering their metabolism and behaviors. As a result, this investigation aimed to elucidate how the development, reproduction, and feeding of Harmonia axyridis Pallas (Coleoptera: Coccinellidae) are affected under Cd contamination. Compared to the control group, the developmental period of H. axyridis was prolonged, with decreased survival, predation, and body weights. Notably, adult insects exhibited deformation, including molting difficulties and wing deformities, which indicated reduced fitness. The ovarian development of female insects was delayed with reduced size, and the pre-oviposition period was prolonged under Cd contamination. Additionally, the hatching rate of offspring was significantly reduced. The Vitellogenin 1 (Vg1) and Vitellogenin 2 (Vg2) exhibited considerable changes throughout their developmental stages. Our results confirmed that the accumulation of Cd has a significant impact on the growth, development, and normal molting of H. axyridis, affecting the reproduction of H. axyridis. The aforementioned results provide valuable insights into the potential ecological effects of Cd accumulation on the food chain, which can inform strategies for pest control, ecosystem stabilization in rice fields, and potentially novel bioremediation approaches. Thereby establishing a theoretical foundation for pest control and ecosystem stabilization in rice fields under Cd contamination while simultaneously providing novel insights for bioremediation strategies.

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