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首页> 外文期刊>Plant ecology & diversity >Inter-regional hybrids of native and non-native Centaurea sulphurea inherit increased competitive ability from the non-natives
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Inter-regional hybrids of native and non-native Centaurea sulphurea inherit increased competitive ability from the non-natives

机译：本地和非本地矢车菊硫脲的区域间杂种继承了非本地人的竞争能力

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Background: Exotic species can rapidly develop adaptations to their non-native regions, such as increased size and competitive ability. Although these traits are believed to be responsible for invasive success, some non-invasive exotic species display them too. This suggests that increased size and competitive ability might be necessary but not sufficient to turn an exotic into a successful invader.Aim: To assess size and competitive ability of the exotic non-invasive weed Centaureasulphurea, and of inter-regional hybrids between native and non-native populations.Methods: We experimentally produced a cohort of C. sulphurea individuals from the native range of the species in Spain, from its non-native range in California, as well as hybrids between the two regions. We grew these plants in pots in competition with the grass Bromus hordeaceus, or alone in control pots.Results: Individuals from California were larger and better competitors than individuals from Spain. Furthermore, inter-regional hybrids showed competitive responses similar to that of individuals from California.Conclusions: Our results confirm that increased competitive ability might be more frequent than previously thought among introduced species, since it can be detected in at least some exotic non-invasive species. They also illustrate the importance of maternal effects, how locally adapted traits are conserved and spread in the non-native ranges of exotic species, and suggest that plant size and competitive ability are not directly associated in this species.
机译：背景：外来物种可以迅速发展适应其非本土区域，例如增加大小和竞争能力。尽管这些特征被认为是入侵成功的原因，但一些非入侵外来物种也展示了它们。这表明增加大小和竞争能力可能是必要的，但不足以使外来入侵者成功入侵。目的：评估外来非入侵杂草矢车菊以及本地和非本地杂草间的杂种的大小和竞争能力。方法：我们通过实验从西班牙物种的本地范围，加利福尼亚的非本地范围以及两个区域之间的杂种中产生了一群硫脲梭菌。我们将这些植物种植在盆栽植物中以与草地布鲁姆草竞争，或者单独种植在对照盆中。结果：来自加利福尼亚的个体比来自西班牙的个体更大，竞争更强。此外，区域间杂种表现出与加利福尼亚州个体相似的竞争反应。结论：我们的结果证实，引入的物种之间竞争能力的提高可能比以前认为的要频繁，因为至少在某些外来非侵入性物种中可以检测到竞争能力。种类。他们还说明了母体效应的重要性，如何在外来物种的非本地范围内保护和传播局部适应性状，并暗示植物的大小和竞争能力与该物种没有直接关系。

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