在模拟热浪期间,大胆和害羞的海的不同代谢反应
Daniel K Maskrey1, Shaun S Killen2, Lynne U Sneddon3
1Department of Earth, Ocean and Ecological Sciences, School of Environmental Sciences, Nicholson Building, University of Liverpool, Liverpool L69 3GP, UK.
The Journal of experimental biology
|January 18, 2024
概括
生物对气候变化的反应涉及代谢和行为调整. 在小风中,代谢率可塑性的个体差异与大胆性有关,这对热浪生存有影响.
科学领域:
- 生态学和进化生物学
- 生理学 生理学 生理学
- 气候变化生物学 气候变化生物学
背景情况:
- 气候变化正在增加热浪的频率,需要生物体的适应策略.
- 现型可塑性,包括代谢和行为变化,对于ectotherms来说至关重要,以应对热应激.
- 在不同的温度下,代谢和行为可塑性之间的相互作用在ectotherms中仍未得到充分研究.
研究的目的:
- 研究温度的变化如何影响贝德莱特海 (Actinia equina) 的新陈代谢率和大胆度之间的关系.
- 为了确定个体差异,或形态型变异,预测代谢可塑性及其与行为的关联.
- 了解代谢和行为可塑性对在气候变暖中生存的适应性影响.
主要方法:
- 采用了一种交叉的实验设计,在非压力温度 (13°C) 和模拟的热浪温度 (21°C) 中测试相同的单个.
- 常规新陈代谢率 (RMR) 在每个温度的短时间间隔内重复测量.
- 沉浸反应时间 (IRT) 是一种测量大胆度的指标,在每个温度下记录每个人的沉浸反应时间.
主要成果:
- 个体差异,而不是形态型,在应对温度变化时显著预测了代谢可塑性.
- 常规代谢率的可塑性与大胆性 (IRT) 相关;害羞的人在13°C时有更高的RMR,而大胆的人在21°C时有更高的RMR.
- 在寒冷的温度下,大胆的个体在模拟热浪期间表现出更高的新陈代谢率,这表明潜在的健身成本.
结论:
- 代谢和行为可塑性与贝德莱特有关,个体变异在它们对热应激反应中起着关键作用.
- 这些发现表明,由于新陈代谢需求的增加,大胆可能会在热浪期间产生健身成本.
- 在非压力温度下较低的新陈代谢率可能有利于生存,因为极端热事件变得越来越频繁.
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