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Updated: Jun 4, 2025

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跨鱼种和生命阶段的热耐性可塑性的动力学
Jeremy De Bonville1, Anna H Andreassen2, Zara-Louise Cowan3
1Groupe de Recherche Interuniversitaire en Limnologie et en Environnement Aquatique (GRIL), Département de Sciences Biologiques, Université de Montréal, Montréal, QC, H2V 0B3, Canada.
Journal of thermal biology
|December 25, 2024
概括
鱼类的热耐受性适应性因物种而异,有些物种迅速适应变暖的水域. 了解这些差异是预测气候变化对水生生态系统的影响的关键.
科学领域:
- 环境生理学环境生理学
- 水生生态学 水生生态学
- 气候变化生物学
背景情况:
- 气候变暖和热浪对鱼类的生存构成重大威胁.
- 快速适应升高的温度对于ectotherm弹性至关重要.
- 关于特定物种和生命阶段的热适应动态知识有限.
研究的目的:
- 研究三种野生捕捞鱼类的热耐受性适应动态.
- 为了比较青少年和成年斑马鱼之间的热耐受适应.
- 确定热适应的关键参数:容量 (ARR),感应时间 (t感应) 和稳定状态 (t稳定) 的时间.
主要方法:
- 在适应温暖条件后,黄金鱼,三脊鱼和欧洲鱼的评估上热耐受性 (CTmax).
- 测量CTmax和较低的热耐受性 (CTmin) 在青少年和成年斑马鱼适应热.
- 量化适应反应比 (ARR),响应诱导时间 (t诱导) 和完全适应的时间 (t稳定).
主要成果:
- 斑马鱼和鱼在3小时的温暖适应后,表现出更高的上部热耐受性.
- 适应诱导时间 (tinduction) 有所不同: 6h (鱼), 24h (鱼).
- 黄金鱼表现出最高的ARR,在10天内没有达到完全适应;其他物种在4-10天内适应.
- 青春期斑马鱼表现出与成年人相似的适应动态,但CTmin更高.
结论:
- 鱼的热耐受度和适应动态在不同物种之间有很大差异.
- 一些物种的适应可能很快 (几个小时),而另一些物种需要更长的时间.
- 一种物种的生命阶段可能表现出类似的热适应模式,但关键容忍度可能有所不同.
- 了解特定物种的热可塑性对于在水生环境中准确的气候变化影响建模至关重要.
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