Fertility and mortality impacts of thermal stress from experimental heatwaves on different life stages and their recovery in a model insect.
Fertility and mortality impacts of thermal stress from experimental heatwaves on different life stages and their recovery in a model insect.
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DOI：
10.1098/rsos.201717
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发表时间：
2021-03-10
影响因子：
3.5
通讯作者：
Gage MJG
中科院分区：
文献类型：
--
作者：
Sales K;Vasudeva R;Gage MJG
随着气候变化造成大气更加不稳定，给生命系统带来热压力的热浪将变得更强、更频繁。使用面粉甲虫赤拟谷盗，我们测量了实验室实验热浪产生的热应激对不同昆虫生命阶段的繁殖和生存的影响，以及恢复的程度和速度。我们将幼虫、蛹、幼年和成熟的成年雄性甲虫暴露在为期 5 天的热应激环境中，温度保持在 40°C 或 42°C，比该物种种群生产力的最佳温度 35°C 高出几度，然后与 30°C 的对照相比，测量了它们的生存和繁殖情况。在幼年生命阶段，热应激引起的死亡率最高。雄性生殖功能尤其会受到高温的损害，特别是在经历蛹或未成熟生命阶段时，在生殖成熟时表现出完全不育；幼虫暴露不会损害成年雄性的生育能力。高温会损害睾丸的发育和活精子的产生，在蛹或幼年成年阶段受到的损害最为严重。尽管存在这种干扰，雄性还是从热应激中恢复过来，并且根据暴露的阶段，睾丸大小、精子生成和生育能力在暴露后 15-28 天恢复正常。我们的实验揭示了热浪条件下的热应激如何影响昆虫不同生命阶段的生存和繁殖，以及恢复的潜力和时间尺度。
With climate change creating a more volatile atmosphere, heatwaves that create thermal stress for living systems will become stronger and more frequent. Using the flour beetle Tribolium castaneum, we measure the impacts of thermal stress from experimental heatwaves in the laboratory on reproduction and survival across different insect life stages, and the extent and pace of any recovery. We exposed larvae, pupae, juvenile and mature adult male beetles to 5-day periods of heat stress where temperatures were maintained at either 40°C or 42°C, a few degrees above the 35°C optimum for this species' population productivity, and then measured survival and reproduction compared with controls at 30°C. Mortality due to thermal stress was greatest among juvenile life stages. Male reproductive function was specifically damaged by high temperatures, especially if experienced through pupal or immature life stages when complete sterility was shown at reproductive maturity; larval exposure did not damage adult male fertility. High temperatures impaired testis development and the production of viable sperm, with damage being strongest when experienced during pupal or juvenile adult stages. Despite this disruption, males recovered from heat stress and, depending on the stage of exposure, testis size, sperm production and fertility returned to normal 15–28 days after exposure. Our experiments reveal how thermal stress from heatwave conditions could impact on insect survival and reproduction across different life stages, and the potential and timescales of recovery.
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影响因子：
2
作者：
Heinze, G;Schemper, M
通讯作者：
Schemper, M
影响因子：
2.2
作者：
Basso, Alicia L.;Forneris, Natalia S.;Quesada-Allue, Luis A.
通讯作者：
Quesada-Allue, Luis A.
影响因子：
30.7
作者：
Christidis, Nikolaos;Jones, Gareth S.;Stott, Peter A.
通讯作者：
Stott, Peter A.
DOI：
10.1101/pdb.emo126
发表时间：
2010-01-01
期刊：
EMERGING MODEL ORGANISMS: LABORATORY MANUAL, VOL 2
影响因子：
--
作者：
Brown, Susan J.;Shippy, Teresa D.;Trauner, Jochen
通讯作者：
Trauner, Jochen
影响因子：
3.8
作者：
Banks, S;King, SA;Saunders, PTK
通讯作者：
Saunders, PTK