现型可塑性是本地蜜蜂耐热性季节和度变化的基础
Matt C Elmer1, Keyne Monro1, Harley Thompson2
1School of Biological Sciences, Monash University, Clayton, Victoria, Australia.
Ecology
|September 5, 2025
概括
像Exoneura robusta这样的本土蜜蜂对气候变化的适应能力有限. 寒冷耐受性变异表明塑性, 而不是遗传变化, 是季节性生存的关键.
科学领域:
- 生态学
- 气候变化生物学
- 昆虫学
背景情况:
- 气候变化对全球生物多样性和生态系统服务构成重大威胁.
- 本地蜜蜂是重要的授粉者,
- 了解气候如何影响蜜蜂的分布和适应至关重要.
研究的目的:
- 研究Exoneura robusta种群对不同气候的适应能力.
- 要确定Exoneura robusta的热耐受性 (热和冷) 是否因地理位置和季节性而有所不同.
- 解开表型可塑性和热耐性的遗传变异的作用.
主要方法:
- 在一个度梯度上进行了大规模的季节性实地采样.
- 在野外采集的蜜蜂中评估了耐热和耐寒性.
- 在温室中对蜜蜂进行不同温度 (21°C和26°C) 的实验适应.
- 在适应后估计的热耐受性,以区分可塑性和遗传变异.
主要成果:
- 在不同度地区,Exoneura robusta种群的耐热性没有变化.
- 较高度的人群表现出更高的耐寒性,并观察到季节性差异.
- 季节性变化和适应性实验表明了表型可塑性,特别是在耐寒性方面.
- 在不同种群和实验条件下,耐热度始终高 (~47°C).
- 发现影响热耐受性的遗传变异的证据有限.
结论:
- 埃克索尼乌拉罗布斯塔种群具有有限的基因或塑性适应增加的热量.
- 现型可塑性在季节性寒冷耐受性中起作用,但遗传适应性似乎很小.
- 这些发现凸显了本地蜜蜂对未来气候变化影响的潜在脆弱性.
- 需要进一步的研究来探讨对授粉者弹性的更广泛影响.
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