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首页> 外文期刊>Oecologia >Low precipitation aggravates the impact of extreme high temperatures on lizard reproduction
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Low precipitation aggravates the impact of extreme high temperatures on lizard reproduction

机译：低降水加剧了极端高温对蜥蜴繁殖的影响

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摘要

Extreme high temperatures are occurring more frequently with ongoing anthropogenic climate warming, but the experimental tests of the effects of high temperatures on terrestrial vertebrates in natural conditions are rare. In this study, we investigated the effects of extreme high temperatures on female reproduction and offspring traits of multi-ocellated racerunners (Eremias multiocellata) kept in field enclosures in the desert steppe of Inner Mongolia. Our studies indicate that high temperatures significantly affect the gestation period and reproductive output of females and the offspring sex ratio, but have little impact on offspring body size and mass. More interestingly, we found that the effect of extreme high temperatures on female reproductive output was not consistent between two consecutive years that differed in precipitation. Low precipitation may aggravate the impact of climate warming on lizards and negatively affect the survival of lizards in the desert steppe. Our results provide evidence that temperature interacts with precipitation to determine the life history of lizards, and they suggest that a drier and hotter environment, such as the future climate in arid mid-latitude areas, will likely impose severe pressure on lizard populations, which are an important component of the food web in desert areas around the world.
机译：持续不断的人为气候变暖导致极端高温的发生更加频繁，但是在自然条件下进行高温对陆生脊椎动物影响的实验测试很少。在这项研究中，我们调查了极端高温对内蒙古沙漠草原田间饲养的多细胞竞跑者（Eremias multiocellata）雌性繁殖和后代性状的影响。我们的研究表明，高温显着影响雌性的妊娠期和生殖能力以及后代的性别比，但对后代的体型和体重几乎没有影响。更有趣的是，我们发现极端高温对女性生殖输出的影响在连续两年的降水量不同的情况下并不一致。降水不足可能加剧气候变暖对蜥蜴的影响，并对沙漠草原中蜥蜴的生存产生负面影响。我们的结果提供了证据，表明温度与降水相互作用决定了蜥蜴的生活史，并且他们表明，干旱和炎热的环境（如干旱的中纬度地区的未来气候）可能会对蜥蜴种群造成严重压力。全球沙漠地区食物网的重要组成部分。

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