蜜蜂在急性暴露于干燥和饥饿后仍然保持耐热性
Victor H Gonzalez1, Wesley Rancher2, Rylee Vigil3
1Undergraduate Biology Program and Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS 66045, USA.
The Journal of experimental biology
|December 19, 2024
概括
致死后的干燥和饥饿并没有显著改变蜜蜂 (Apis mellifera) 或汗水蜜蜂 (Lasioglossum malachurum) 的耐热性. 然而,耐热度的变化增加表明气候变化对蜜蜂种群的影响复杂.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
背景情况:
- 生物体面临着相互作用的环境压力因素,如热量,干燥和饥饿,特别是在气候变化下.
- 了解这些相互作用对于预测物种的反应和告知保护工作至关重要.
- 社会蜜蜂,包括蜜蜂 (Apis mellifera) 和野生汗蜜蜂 (Lasioglossum malachurum),是面对这些威胁的重要授粉者.
研究的目的:
- 调查亚致命干燥暴露对Apis mellifera和Lasioglossum malachurum的耐热性的影响.
- 为了检查短时间的饥饿与干燥如何影响Apis mellifera的耐热性.
- 评估对蜜蜂抵御气候变化引起的极端天气事件的影响.
主要方法:
- 使用动态和静态协议评估耐热度 (临界热最大值-CTmax,热昏迷的时间).
- 蜜蜂暴露于不同程度的次致命干燥 (16.7%,50.0%,LD50的83.3%).
- 研究了24小时饥饿和中度干燥 (50%LD50) 对蜜蜂耐热性的联合影响.
主要成果:
- 在任何一种蜜蜂物种中,次致命干燥并没有显著改变CTmax或热昏迷的时间.
- 经过中度干燥后的饥饿并没有改变蜜蜂的平均CTmax,但增加了其差异.
- 单个蜜蜂对温度压力的反应在联合压力因素后显示出更大的变化.
结论:
- 致命的干燥和饥饿可能不会直接损害蜜蜂的临界热极限.
- 在CTmax中增加的变异表明,殖民地层面对热浪的反应可能具有不可预测的可能性.
- 需要对缺氧条件和单独蜜蜂对联合压力因素的反应进行进一步研究.
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