太阳辐射改变了飞行的沙漠蜜蜂的热平衡和温度调节
Meredith G Johnson1,2, Meghan Barrett3, Jon F Harrison1
1School of Life Sciences, Arizona State University, Tempe, AZ 85281, USA.
The Journal of experimental biology
|December 13, 2024
概括
太阳辐射显著影响沙漠蜜蜂的热平衡,增加胸部温度和水损失. 蜜蜂增加对流来管理热量,但在变暖的环境中面临生存挑战.
科学领域:
- 昆虫生理学 昆虫生理学
- 环境科学环境科学
- 热调节 热调节 热调节
背景情况:
- 太阳辐射是陆地动物的一个关键环境因素.
- 它对大型飞行昆虫的热平衡的影响仍未得到充分研究.
- 沙漠蜜蜂 (Centris pallida) 是面临高太阳辐射暴露的重要授粉者.
研究的目的:
- 为了研究太阳辐射在飞行沙漠蜜蜂的热平衡中的作用.
- 为了比较对不同性别和男性形态 (大和小) 的影响.
- 了解应对太阳能负荷的温度调节策略.
主要方法:
- 在呼吸计学中计算Centris pallida蜜蜂的热预算.
- 通过比较空气温度范围 (1637°C) 的阴凉与阳光明的条件.
- 分析胸部温度,新陈代谢率和蒸发性水损失.
主要成果:
- 太阳辐射占总热量增长的4354%.
- 在阳光明的条件下,胸部温度高出1.7°C.
- 在阳光下,蒸发性水损失增加了一倍以上,而飞行代谢率基本保持不变.
- 电流导电量显著增加,由较大的蜜蜂的胸部-腹部热传递介导.
结论:
- 中心白蜂利用增加的对流来管理太阳的热量增长和节约水.
- 空气温度的升温与太阳辐射相结合,可能会推动蜜蜂走向不可持续的蒸发性水损失.
- 这凸显了沙漠蜜蜂对气候变化和热应激的潜在脆弱性.
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