温暖和热量可变的化条件降低了胚胎的表现,并继续影响化交易
1University of the Pacific, Stockton, CA, USA.
Journal of thermal biology
|September 12, 2024
概括
每天的温度波动会影响蛋的发育和幼的特征. 高温变化可能会对化成功产生负面影响,并在生命后期的生存和发育中产生权衡.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 生理学 生理学 生理学
背景情况:
- 动物的热性能通常使用恒定温度进行研究,但现实世界的环境涉及每日温度波动.
- 化温度的变化可能会对后代产生持久的影响,原因是卵子的敏感性和无法进行行为温度调节.
- 了解这些影响对于预测动物对气候变化的反应至关重要,其中包括增加的温度变化.
研究的目的:
- 调查化期间每日温度范围 (DTR) 如何影响蛋发育和随后的化特征.
- 将DTR的影响纳入现有的热性能曲线 (TPC) 框架.
- 探索潜在生命史和因化热条件引起的应激耐受性方面的潜在权衡.
主要方法:
- 对Gryllus lineaticeps蛋的平均化温度 (20, 25, 30°C) 和每日温度范围 (DTR: ±0, ±5, ±10°C) 的因数操纵.
- 监测化成功,时间和随后的化表现,包括饥饿抵抗力和发育率.
- 分析从化热条件到化后生命阶段的传递效应.
主要成果:
- 低DTR (±5°C) 没有损害发育,并改善了幼的饥饿抵抗力.
- 高DTR (±10°C) 在温暖的平均温度 (30°C) 降低和延迟化.
- 高DTR导致化发育加速,但减少了饥饿抵抗力,表明转移效应和权衡.
结论:
- 化期间的每日温度范围显著影响后代的表现和生存.
- 化热条件可以形成生命历史特征和应激耐受性之间的复杂权衡.
- 动物可能面临复杂的挑战,适应日益变化的变化和变暖的环境.
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