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澳大利亚无刺蜂的热应激生存和热耐受性

Scott Nacko¹, Mark A Hall¹, Rosalyn Gloag²

¹Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia.

Journal of thermal biology

|September 7, 2023

概括

无刺蜂表现出与其气候范围相关的不同耐热度. 在全球气温上升的情况下,管理策略对于殖民地生存至关重要.

科学领域:

生态生态学生态生态学
动物学动物学
气候变化生物学气候变化生物学

背景情况:

无刺蜂 (Meliponini) 是热带和亚热带地区的重要授粉者.
了解它们的热耐受性对于预测气候变化和极端高温事件的影响至关重要.

研究的目的:

评估三个澳大利亚无刺蜂物种的临界热最大值 (CTmax),热生存,冷昏迷恢复和热偏好.
为了将热耐受性与每个物种范围的气候条件相关联.

主要方法:

测量CTmax,在暴露于热 (1-8小时) 后的生存率和冷昏迷恢复时间.
使用温度梯度装置 (17-38°C) 观察到的热偏好.
在Tetragonula carbonaria,T. hockingsi和Austroplebeia australis之间比较热耐受性.

主要成果:

与T. hockingsi (1059秒,~43.1°C) 和T. carbonaria (872秒,~43.1°C) 相比,Austroplebeia australis表现出更快的冷昏复苏 (288秒) 和更高的CTmax (44.5°C).
碳素菌捕食者T. carbonaria在暴露1小时热量后在42-45°C时显示出高死亡率 (95-100%).
幼虫和虫表现出比成年采集者更大的耐热性.
采集者没有明确的偏好,但在梯度中经常被发现接近18°C.

结论:

跨物种的热耐受性差异与物种的气候范围保持一致.
澳大利亚海可能已经面临超过其热极限的热事件.
建议在气候变化下隔离巢部和保护息地,以确保殖民地在气候变化下生存.

关键词:

澳大利亚人是北方人.寒冷的昏迷状态导致了昏迷.临界热最大值是指临界热最大值.梅里波尼尼尼 (Meliponini) 是一个岛屿.没有刺的蜜蜂.在四角中,有四角.热生物学的热生物学

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