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首页> 外文期刊>Ecological research >Phenotypic plasticity and contemporary evolution in introduced populations: evidence from translocated populations of white sands pupfish (Cyrpinodon tularosa)
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Phenotypic plasticity and contemporary evolution in introduced populations: evidence from translocated populations of white sands pupfish (Cyrpinodon tularosa)

机译：表观可塑性和当代进化的传入种群：白沙p（Cyrpinodon tularosa）易位种群的证据

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摘要

Contemporary evolution has been shown in a few studies to be an important component of colonization ability, but seldom have researchers considered whether phenotypic plasticity facilitates directional evolution from the invasion event. In the current study, we evaluated body shape divergence of the New Mexico State-threatened White Sands pupfish (Cyprinodon tularosa) that were introduced to brackish, lacustrine habitats at two different time in the recent past (approximately 30 years and 1 year previously) from the same source population (saline river environment). Pupfish body shape is correlated with environmental salinity: fish from saline habitats are characterized by slender body shapes, whereas fish from fresher, yet brackish springs are deep-bodied. In this study, lacustrine populations consisted of an approximately 30-year old population and several 1-year old populations, all introduced from the same source. The body shape divergence of the 30-year old population was significant and greater than any of the divergences of the 1-year old populations (which were for the most part not significant). Nonetheless, all body shape changes exhibited body deepening in less saline environments. We conclude that phenotypic plasticity potentially facilitates directional evolution of body deepening for introduced pupfish populations.
机译：一些研究表明当代进化是殖民能力的重要组成部分，但很少有研究者考虑表型可塑性是否促进了入侵事件的定向进化。在当前的研究中，我们评估了新墨西哥州受威胁的白沙p（Cyprinodon tularosa）的体形差异，这些p鱼在最近的过去（大约30年和1年之前）的两个不同时间引入咸淡的湖生栖息地。相同的来源人口（盐河环境）。 fish鱼的体形与环境盐度相关：来自盐碱生境的鱼的特征是细长的体形，而来自较新鲜但微咸的泉水的鱼则体型较深。在这项研究中，湖相种群由大约30岁的人口和几个1岁的人口组成，所有这些人口都是从同一来源引进的。 30岁人口的体形差异很大，并且比1岁人口的任何体形差异大（大部分差异不显着）。尽管如此，所有身体形状的变化都在盐分较少的环境中表现出身体加深。我们得出结论，表型可塑性潜在地促进了引入的introduced鱼种群的身体加深方向性进化。

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