使用弹尾的生存和繁殖测试揭示了北极生态区的气候变化的石油碳化合物土壤毒性
Prama Roy1, Allison Rutter2, Amy Gainer3
1School of Environmental Studies, Queen's University, Kingston, ON, K7L 3N6, Canada. 14pr4@queensu.ca.
Environmental science and pollution research international
|September 20, 2024
概括
石油碳化合物 (PHC) 污染的土壤即使在25年后,对本地春尾仍然有毒. 即使是低度 (25%) 的PHC污染土壤也显著降低了春尾生存和繁殖率,这表明长期的生态风险.
科学领域:
- 环境毒理学环境毒理学
- 土壤科学 土壤科学
- 生态毒理学 生态毒理学
背景情况:
- 工业场所可以将石油碳化合物 (PHC) 释放到环境中.
- 由PHC污染的土壤对陆地生态系统构成风险.
- 春尾 (Collembola) 是对环境变化敏感的重要无脊椎动物.
研究的目的:
- 评估来自加拿大北极工业基地的细粒度PHC污染土壤的毒性.
- 为了确定老年PHC污染对本地春尾物种生存和繁殖的影响.
- 为了确定最能导致观察到的毒性的PHC分量.
主要方法:
- 在两种本地春尾物种 (Folsomia candida和Proisotoma minuta) 上进行了生存和繁殖测试.
- 春尾被暴露在PHC污染的土壤和背景土壤的不同混合物 (0-100%) 中.
- 土壤污染的特点是总PHC度和特定的PHC分数 (CCME分数).
主要成果:
- 与背景土壤相比,暴露在受污染的土壤中的两种春尾物种的生存和繁殖率显著下降.
- 最明显的负面影响发生在0%到25%受污染的土壤混合物之间.
- 毒性归因于PHC Fraction 2 (nC10-nC16) 化合物和在寒冷的气候中缓慢的气候变化.
结论:
- 工业场所的细粒度PHC污染土壤在经过25年多的气候变化后仍然对本地春尾有毒.
- 春尾种群容易受到老年PHC污染的影响,在低暴露水平时会产生重大影响.
- PHC Fraction 2的基因毒性和寒冷气候下的缓慢降解率有助于持续的土壤毒性.
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