温度适应期对陆地沙兰上层热容忍度的影响
Sandra C Valderrama Robles1,2, Molly G Russell1,3, Carl D Anthony1
1Department of Biology, John Carroll University, University Heights, OH, United States of America.
PeerJ
|February 9, 2026
概括
东部红背沙兰在临界热最大值 (CTmax) 中显示出最小的变化,无论短期或长期的热适应. 这表明这种物种在不同的热条件下CTmax的表型可塑性有限.
科学领域:
- 生理生态生态学生理生态学
- 气候变化生物学
- 两动物生态生理学
背景情况:
- 临界热最大值 (CTmax) 是一个关键的生理特征,表明温度耐受性的上限.
- 热适应能力,即适应温度变化的能力,影响CTmax.
- 了解热适应对于预测物种对气候变化的脆弱性至关重要,特别是在两动物中.
研究的目的:
- 为了评估东方红背 (Plethodon cinereus) 的热适应能力.
- 为了确定短期和长期适应更高温度是否会影响CTmax.
- 评估CTmax中的表型可塑性,以应对不同的适应持续时间.
主要方法:
- 对Plethodon cinereus进行了三种适应治疗:控制 (15°C30天),短期适应 (15°C28天,然后23°C48小时) 和长期适应 (23°C30天).
- 在适应期结束时,测量了所有个体的临界热最大值 (CTmax).
- 使用统计分析来比较不同治疗组的CTmax值.
主要成果:
- 与对照组相比,在短期 (+0.93°C) 和长期 (+0.98°C) 适应组中观察到CTmax略有增加.
- 短期和长期适应组之间的CTmax差异可以忽略不计 (0.05°C).
- 在治疗组中观察到的CTmax差异中,没有一个具有统计学意义.
结论:
- 东部红背在临界热最大值 (CTmax) 中表现出有限的表型可塑性,这与适应期的长度有关.
- 诸如保温极限或温度差异不足等因素可能解释了最小反应.
- 结果表明,适应时间可能不会显著改变Plethodon cinereus的CTmax,影响气候变化脆弱性的预测.
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