来自哈德逊河的大西洋鱼生命早期温度压力的有害影响和基因表达的改变
Adedamola Adenekan1, Kristin Terez2, Alireza Khodadadi-Jamayran3
1Division of Environmental Medicine, Department of Medicine, New York University Grossman School of Medicine, NY, 10010 New York, United States of America; Department of Environmental Health Sciences, School of Public Health University of Michigan, Ann Arbor, MI 48109, United States of America.
The Science of the total environment
|August 3, 2025
概括
哈德逊河温度的升温对大西洋鱼 (Microgadus tomcod) 的胚胎和幼虫产生了负面影响. 温度升高导致死亡率和应激反应的增加,威胁到这一关键的繁殖群体.
科学领域:
- 海洋生物学 海洋生物学
- 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:
- 哈德逊河 (HR) 正经历快速变暖,影响冷水河口物种.
- 大西洋鱼 (Microgadus tomcod) 是一个Gadidae物种,其南部分布受到水温上升的限制.
- 该地区是大西洋鱼最南端的繁殖群体所在地,目前这个群体正在严重下降.
研究的目的:
- 为了研究预计的变暖HR冬季水温对大西洋鱼健康的影响.
- 评估温度升高对鱼胚胎和幼虫发育以及基因表达的影响.
主要方法:
- 控制的实验室实验使鱼胚胎和幼虫暴露在各种预测的冬季水温下.
- 测量健康状况的分析,包括化率,生长率,心率和幼虫死亡率.
- RNA-Seq分析以在不同的温度条件下识别差异表达基因 (DEGs).
主要成果:
- 较高的温度增加了化率,生长率和心率,但也增加了幼虫死亡率.
- 随着温度的上升,差异表达基因 (DEGs) 的数量显著增加 (349在3.5°C,565在6.2°C,1286在8.3°C与2.7°C相比).
- DEGs主要与应激反应,心脏健康和蛋白质平衡有关.
结论:
- 大西洋鱼表现出应对温度升温的压力反应,通过降低能量密集的过程,如蛋白质平衡.
- 这些生理变化对哈德逊河中的大西洋鱼种群构成潜在的长期健康风险.
- 这些发现凸显了冷水河口物种对气候变化和水生环境变暖的脆弱性.
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