与气候相关的氧热挤压会在湖面的鱼类食物中提升
Stephen F Jane1,2, Thomas M Detmer2, Collin A Eagles-Smith3
1Cornell Atkinson Center for Sustainability, Cornell University, Ithaca, New York 14853, United States.
Environmental science & technology
|December 23, 2025
概括
气候变化正在导致湖泊的氧热挤压,迫使鱼类进入低氧水域. 这种息地压缩显著增加了冷水鱼类的甲基 (MeHg) 污染,造成生态风险.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 气候变化科学 气候变化科学
背景情况:
- 气候变化正在加热湖泊,减少底层水中的溶解氧气.
- 这造成了无毒区,并压缩了冷水鱼的息地.
- 无氧可以促进有毒甲基 (MeHg) 的产生.
研究的目的:
- 为了测试氧热挤压是否增强鱼类中的生物积累.
- 调查息地压缩和鱼类水平之间的关系.
主要方法:
- 从纽约阿迪伦达克公园的16个湖泊收集了高分辨率的氧气数据.
- 在连续两年测量了鱼肌肉中的度.
- 分析了与湖泊无氧和氧热息地压缩有关的数据.
主要成果:
- 经历氧热挤压的湖泊显示肌肉度持续升高 (平均0.40μg/g).
- 来自挤压息地的鱼类中的含量是氧气充足的湖泊的两倍多.
- 无氧但没有挤压的湖泊中介含量,突出了息地压缩的作用.
结论:
- 氧热息地挤压显著增加了冷水鱼类中的甲基生物积累.
- 气候变化引起的息地压缩是鱼类污染增加的关键驱动因素.
- 由于这些气候驱动的影响,即使在稳定的输入的情况下,鱼类的含量预计也将增加.
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