两个气候截然不同的同种春尾种群的表型可塑性和温度反应的热效率。

IF 2.9 2区 生物学 Q2 BIOLOGY
Sagnik Sengupta , Hans Petter Leinaas
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引用次数: 0

摘要

温度通过对生理过程的直接影响来驱动生命史特征的适应。然而,多种生活史性状作为一种生活史策略共同进化。因此,对某些性状而言,限制其性状进化手段和表型可塑性的生理限制可能比其他性状更大。对不同生活史性状的热反应进行比较可以加深我们对生活史策略决定机制的理解。在本研究中,我们重点研究了一种大量分布于北半球的土壤微型节肢动物--Folsomia quadrioculata(疣柄节肢动物)。我们从气候反差极大的地区--北极苔原和针叶林地--分别选取了一个北极种群和一个温带种群,比较了它们在生命周期的主要部分在四种温度下生长、发育、繁殖和存活的热可塑性和热效率。我们希望了解温度驱动生命史策略进化的机制。我们发现,温带种群在10-15 °C的温度范围内发挥最大效能,而北极种群则在更大的温度范围内(10-20 °C)保持热效率。热可塑性以特异性的方式变化,与热效率的差异一起考虑时,表明温度条件的随机性可能是形成生活史策略的重要因素。我们的研究表明,在分析热适应性时,采用整个有机体的方法并考虑生理时间因素,将显著提高我们对热适应性与全球气候变化响应之间可能存在的联系的理解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Phenotypic plasticity and thermal efficiency of temperature responses in two conspecific springtail populations from contrasting climates

Temperature drives adaptation in life-history traits through direct effects on physiological processes. However, multiple life-history traits co-evolve as a life-history strategy. Therefore, physiological limitations constraining the evolution of trait means and phenotypic plasticity can be larger for some traits than the others. Comparisons of thermal responses across life-history traits can improve our understanding of the mechanisms determining the life-history strategies. In the present study, we focused on a soil microarthropod species abundant across the Northern Hemisphere, Folsomia quadrioculata (Collembola), with previously known effects of macroclimate. We selected an arctic and a temperate population from areas with highly contrasting climates — the arctic tundra and a coniferous forest floor, respectively — and compared them for thermal plasticity and thermal efficiency in growth, development, fecundity, and survival across four temperatures for a major part of their life cycle. We intended to understand the mechanisms by which temperature drives the evolution of life-history strategies. We found that the temperate population maximized performance at 10–15 °C, whereas the arctic population maintained its thermal efficiency across a wider temperature range (10–20 °C). Thermal plasticity varied in a trait-specific manner, and when considered together with differences in thermal efficiency, indicated that stochasticity in temperature conditions may be important in shaping the life-history strategies. Our study suggests that adopting a whole-organism approach and including physiological time considerations while analysing thermal adaptation will markedly improve our understanding of plausible links between thermal adaptation and responses to global climate change.

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来源期刊
Journal of thermal biology
Journal of thermal biology 生物-动物学
CiteScore
5.30
自引率
7.40%
发文量
196
审稿时长
14.5 weeks
期刊介绍: The Journal of Thermal Biology publishes articles that advance our knowledge on the ways and mechanisms through which temperature affects man and animals. This includes studies of their responses to these effects and on the ecological consequences. Directly relevant to this theme are: • The mechanisms of thermal limitation, heat and cold injury, and the resistance of organisms to extremes of temperature • The mechanisms involved in acclimation, acclimatization and evolutionary adaptation to temperature • Mechanisms underlying the patterns of hibernation, torpor, dormancy, aestivation and diapause • Effects of temperature on reproduction and development, growth, ageing and life-span • Studies on modelling heat transfer between organisms and their environment • The contributions of temperature to effects of climate change on animal species and man • Studies of conservation biology and physiology related to temperature • Behavioural and physiological regulation of body temperature including its pathophysiology and fever • Medical applications of hypo- and hyperthermia Article types: • Original articles • Review articles
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