Phenological displacement is uncommon among sympatric angiosperms

Phenological displacement is uncommon among sympatric angiosperms
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物候位移在同域被子植物中并不常见

DOI:
10.1111/nph.17784
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发表时间:
2021
期刊:
影响因子:
9.4
通讯作者:
Davis, Charles C.
Davis, Charles C.
中科院分区:
生物学1区
文献类型:
--
作者:
Park, Daniel S.;Breckheimer, Ian K.;Ellison, Aaron M.;Lyra, Goia M.;Davis, Charles C.

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物种之间的相互作用可以影响成功的繁殖,从而导致生殖特征的移位,即近亲一起生长时的生殖特征的相似性——例如开花时间——与分开生长时不同。关于这一现象的总体普遍性和方向及其在环境变化下的稳定性的证据仍未在大尺度上得到检验。利用众包的力量,我们收集了超过4万份植物标本的物候信息,并调查了美国东部110种动物授粉物种的开花时间变化。总的来说,开花时间位移在大尺度上并不常见。然而,无论方向如何,在开花时间接近的种对之间,位移通常更大。此外,据预测,随着气候变化,亲缘物种的平均开花时间将在21世纪中期进一步分化。我们证明,在共同发生的密切相关的物种对之间,物候位移的程度和方向差异很大。然而,未来的气候变化可能会改变许多物种对繁殖时间的差异,这可能对物种相互作用和基因流动产生重大影响。我们的研究为理解物候景观的结构和对未来环境变化的反应提供了一条有希望的途径。
Interactions between species can influence successful reproduction, resulting in reproductive character displacement, where the similarity of reproductive traits – such as flowering time – among close relatives growing together differ from when growing apart. Evidence for the overall prevalence and direction of this phenomenon, and its stability under environmental change, remains untested across large scales.Using the power of crowdsourcing, we gathered phenological information from over 40 000 herbarium specimens, and investigated displacement in flowering time across 110 animal‐pollinated species in the eastern USA.Overall, flowering time displacement is not common across large scales. However, displacement is generally greater among species pairs that flower close in time, regardless of direction. Furthermore, with climate change, the flowering times of closely related species are predicted, on average, to shift further apart by the mid‐21stcentury.We demonstrate that the degree and direction of phenological displacement among co‐occurring closely related species pairs varies tremendously. However, future climate change may alter the differences in reproductive timing among many of these species pairs, which may have significant consequences for species interactions and gene flow. Our study provides one promising path towards understanding how the phenological landscape is structured and may respond to future environmental change.
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