预测气候变化下的蜂群数量
Melanie R Kazenel1, Karen W Wright2,3, Terry Griswold4
1Department of Biology, University of New Mexico, Albuquerque, NM, USA. melanie.kazenel@gmail.com.
Nature
|March 28, 2024
概括
气候变化威胁着蜜蜂的多样性. 干旱和热压力影响蜜蜂种群,导致许多物种的数量下降,并转向耐旱类,可能减少授粉服务.
科学领域:
- 生态学
- 气候变化生物学
- 保护生物学
背景情况:
- 昆虫授粉者对生态系统和经济至关重要.
- 对气候对蜜蜂种群的影响的长期数据和机制理解有限.
- 气候变化迫切威胁着授粉者的多样性和功能.
研究的目的:
- 研究气候变化对蜂群多样性的影响,
- 将蜜蜂的繁殖模式与它们对热量和干燥的生理性耐受性联系起来.
- 在气候变化场景下预测未来蜜蜂群体的组成和授粉服务.
主要方法:
- 在665个物种×生态系统组合中记录了16年的蜜蜂数量数据.
- 用实验确定蜜蜂种类的热量和干燥容忍度.
- 利用气候敏感性模型预测未来蜜蜂群体的动态.
主要成果:
- 在研究的71%种群中,干旱是蜂群繁多的一个强有力的预测因素.
- 耐热和耐干燥的蜜蜂种类随着时间的推移而增加.
- 模型预测了46%的蜜蜂种类的下降,转向耐旱类和增加同质性.
- 在中等到高干旱条件下,体型较大的蜜蜂占主导地位.
结论:
- 气候变化,特别是干旱, 直接威胁到蜜蜂的多样性.
- 蜜蜂群体组成的变化可能会导致专业授粉者丧失授粉服务.
- 蜜蜂保护策略必须考虑干旱的生理影响,并促进多样化的蜜蜂群体的弹性.
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