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首页> 外文期刊>Folia geobotanica >Narrow endemics of the Almeria Province (Andalusia, Spain) differ in their traits and ecological niche compared to their more widespread congeners
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Narrow endemics of the Almeria Province (Andalusia, Spain) differ in their traits and ecological niche compared to their more widespread congeners

机译：与更广泛的同类物相比，阿尔梅里亚省（西班牙安达卢西亚）的地方特有种在特征和生态位方面有所不同

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摘要

Understanding the evolutionary ecology of geographically restricted species is of great importance for the design of conservation strategies and for gaining insight into the evolutionary processes involved in the origin and maintenance of those species. With a very high proportion of endemic species and/or subspecies, the province of Almeria in Andalusia (SE Spain) represents a prominent hotspot of plant diversity in the Mediterranean Basin. In this paper, we use phylogenetically independent contrasts to examine whether narrow endemics (i.e. species mostly restricted to the Almeria Province, hereafter NE) have evolved a 'syndrome of endemism'. Based on published trait values, we tested whether (i) NE occupy a particular altitudinal range, possess a smaller niche breadth and occur within particular plant associations, and whether (ii) NE have distinct vegetative and reproductive traits. We found that, compared to their more widespread congeners, NE (i) occupy a narrower altitudinal range at the upper or lower limits of their congeners' ranges; (ii) occur in a smaller number of plant communities that are distinct from the communities of widespread species; and (iii) have an 11 % shorter flowering duration, 28 % fewer flowers per inflorescence, 30 % reduced floral display, and 23 % lower floral attractiveness. These differences are not explained by a smaller size overall or a different ploidy level. NE have apparently evolved traits that promote selfing. The shift towards higher selfing rates is interpreted as a mechanism to promote reproductive assurance and to decrease gene flow from the more widespread congeners.
机译：理解受地理限制的物种的进化生态学对于保护策略的设计以及深入了解那些物种的起源和维持所涉及的进化过程具有重要意义。安达卢西亚的阿尔梅里亚省（西班牙东南部）特有物种和/或亚种比例很高，是地中海盆地植物多样性的重要热点。在本文中，我们使用系统发生学上独立的对比来检查狭窄的地方病（即主要限于阿尔梅里亚省（以下简称NE）的物种）是否已演变为``地方病综合症''。基于已公布的性状值，我们测试了（i）NE是否具有特定的海拔范围，具有较小的利基宽度并在特定的植物群落中发生，以及（ii）NE是否具有不同的营养和生殖性状。我们发现，与其更广泛的同类物相比，NE（i）在其同类物范围的上限或下限处占据了一个较窄的海拔范围; （ii）发生在与广泛物种群落不同的少数植物群落中; （iii）开花时间缩短了11％，每朵花的开花时间减少了28％，花卉展示减少了30％，花卉吸引力降低了23％。这些差异不能通过较小的整体尺寸或不同的倍性水平来解释。 NE显然已经进化出能促进自交的特征。向更高的自交率的转变被解释为一种促进生殖保证并减少来自更广泛的同类物的基因流的机制。

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