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<p>Microplastics (MP) pose potential harm to the environment and human health. However, only a few studies have focused on the size-dependent effects and toxicity of microplastics on soil-dwelling nematodes. In this study, we investigated the effects of micropolystyrene particles with diameters of 0.1&#xa0;μm, 0.5&#xa0;μm, and 1&#xa0;μm on the population abundance and body size of the three soil nematodes - <i>Cephalobus</i> sp., <i>Cervidellus vexilliger</i>, and <i>Mesorhabditis</i> sp., isolated from Davao de Oro in southern Philippines. After 45 days of exposure to MPs of different sizes, the three nematode species showed significant decreases in population abundance. For the body size parameters, a significant decrease was observed in the body lengths of the three nematode species and the body volume of <i>Cephalobus sp</i>. when exposed to the different MPs sizes. Among the three MP sizes, 0.1&#xa0;μm yielded the most profound impact on the nematode responses, resulting in significant decreases in population abundance, and body size of the three species. These findings demonstrate that microplastic particles can cause size-dependent toxicity to soil-dwelling nematodes’ physical and biological characteristics, posing deleterious effects to these organisms.</p>

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Microplastic-induced reductions in population abundance and body size of soil nematodes

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月14日

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  • Nurhana J. Sabaani,
  • Hernando P. Bacosa,
  • Jennifer Theresse C. Paradero,
  • Jhosin Jaik B. Pardillo,
  • Jay Rumen U. Maglupay,
  • Princess Angeli Casas,
  • Ma. Reina Suzette Madamba,
  • Joey Genevieve T. Martinez

摘要

Microplastics (MP) pose potential harm to the environment and human health. However, only a few studies have focused on the size-dependent effects and toxicity of microplastics on soil-dwelling nematodes. In this study, we investigated the effects of micropolystyrene particles with diameters of 0.1 μm, 0.5 μm, and 1 μm on the population abundance and body size of the three soil nematodes - Cephalobus sp., Cervidellus vexilliger, and Mesorhabditis sp., isolated from Davao de Oro in southern Philippines. After 45 days of exposure to MPs of different sizes, the three nematode species showed significant decreases in population abundance. For the body size parameters, a significant decrease was observed in the body lengths of the three nematode species and the body volume of Cephalobus sp. when exposed to the different MPs sizes. Among the three MP sizes, 0.1 μm yielded the most profound impact on the nematode responses, resulting in significant decreases in population abundance, and body size of the three species. These findings demonstrate that microplastic particles can cause size-dependent toxicity to soil-dwelling nematodes’ physical and biological characteristics, posing deleterious effects to these organisms.