数字农科院2.0

Telomere length, oxidative stress and their links with growth and survival in a lizard facing climate warming

文献类型： 外文期刊

作者： Qiong Zhang;Xing Zhi Han;Pablo Burraco;Xin Hao;Li Wei Teng;Zhen Sheng Liu;Fu Shun Zhang;Wei Guo Du

作者机构：

关键词： Antioxidant capacity;Climate warming;Lizard;Survival;Telomere dynamics

期刊名称： Science of the Total Environment

ISSN： 0048-9697

年卷期： 2023 年 891 卷

页码：

收录情况： SCIE（2023版） ; ; EI（2023版）

摘要： Higher temperatures enhance ectothermic metabolism and development, which can reduce individual health and life expectancy, and therefore increase their vulnerability to climate warming. However, the mechanistic causes and consequences of such a temperature-driven impact remain unclear. Our study aimed to address two questions: (1) does climate warming alter early-life growth and physiology, and, if so, what are the associated carry-over effects in terms of reduced survival, increased oxidative stress and telomere shortening? (2) can oxidative stress and telomere dynamics at early life stages predict the effect of climate warming on individual survival? To answer these questions, we conducted a longitudinal experiment under semi-natural conditions where we exposed multiocellated racerunner (Eremias multiocellata) to warming conditions from juvenile to adult stages. We found that exposure to climate warming enhanced growth rates, induced oxidative stress, and shortened telomere length of juvenile lizards. Warming conditions did not induce carry-over effects in terms of altered growth rate or physiology but resulted in increased mortality risk in the later life. Intriguingly, telomere shortening in young individuals was associated with mortality risk later in life. This study improves our mechanistic understanding of how global warming impacts on ectotherms' life-history traits, which encourages the inclusion of physiological information in assessing species vulnerability to climate change.

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