Flowering synchrony drives reproductive success in a wind-pollinated tree.,Ecology Letters

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Flowering synchrony drives reproductive success in a wind-pollinated tree.
Ecology Letters ( IF 7.6 ) Pub Date : 2020-09-27 , DOI: 10.1111/ele.13609
Michał Bogdziewicz ₁ , Mario Pesendorfer ₂ , Elizabeth E Crone ₃ , Carlos Pérez-Izquierdo ₄ , Raul Bonal ₄

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Synchronised and quasi‐periodic production of seeds by plant populations, known as masting, is implicated in many ecological processes, but how it arises remains poorly understood. Flowering and pollination dynamics are hypothesised to provide the mechanistic link for the observed relationship between weather and population‐level seed production. We report the first experimental test of the phenological synchrony hypotheses as a driver of pollen limitation in mast seeding oaks (Quercus ilex). Higher flowering synchrony yielded greater pollination efficiency, which resulted in 2‐fold greater seed set in highly synchronised oaks compared to asynchronous individuals. Pollen addition removed the negative effect of asynchronous flowering on seed set. Because phenological synchrony operates through environmental variation, this result suggests that oak masting is synchronised by exogenous rather than endogenous factors. It also points to a mechanism by which changes in flowering phenology can affect plant reproduction of mast‐seeding plants, with subsequent implications for community dynamics.

中文翻译：

开花的同步性促进了风铃树的繁殖成功。

植物种群同步并准周期性地产生种子，被称为肥大，涉及许多生态过程，但其产生的方式仍知之甚少。假设开花和授粉动力学为观察到的天气与种群水平种子生产之间的关系提供了机械联系。我们报告了物候同步假设的第一个实验测试，作为桅杆播种橡树（栎栎）中花粉限制的驱动因素）。较高的开花同步性具有更高的授粉效率，与异步个体相比，高度同步化的橡树的结实率提高了2倍。花粉的添加消除了异步开花对结实的不利影响。由于物候同步是通过环境变化来进行的，因此该结果表明橡木的成熟是由外源而非内源因素同步的。它还指出了开花物候变化可影响种苗植物的繁殖的机制，从而对群落动态产生了影响。

更新日期：2020-11-12

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