The effect of samara wing presence on predation of Acer pseudoplatanus (Sapindaceae) seeds on the ground,Plant Species Biology

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The effect of samara wing presence on predation of Acer pseudoplatanus (Sapindaceae) seeds on the ground
Plant Species Biology ( IF 1.1 ) Pub Date : 2020-01-22 , DOI: 10.1111/1442-1984.12266
Dagmar der Weduwen ₁ , Graeme D. Ruxton ₁

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The key selective pressure shaping the morphology of samaras is seen as enhancing primary wind‐borne dispersal from the parent plant to the ground. However, the consequences of the samara wing of primarily wind‐dispersed tree species for post‐dispersal processes has not been well studied. We explored whether the presence of this wing in Acer pseudoplatanus either deters or promotes predation after dispersal, either by increasing the time and energy required to predate the seed or by increasing the seed's visibility to predators. We found that wing‐removed fruits were preferred, suggesting that the presence of samaras makes seed handling more expensive for granivores. Further, we found that fewer seeds were consumed from treatments that contained the most winged seeds, thus there was no evidence of the samaras making seed finding easier for granivores. We conclude that the presence of the wing may offer an anti‐predatory benefit as well as aiding primary dispersal.

中文翻译：

翼果翅的存在对地面槭树（Sapindaceae）种子捕食的影响

塑造samaras形态的关键选择性压力被认为是增强了从亲本植物到地面的一次风传播。但是，尚未充分研究主要是风散布树种的翼果翅对后散布过程的影响。我们探讨了在Acer pseudoplatanus中是否存在该翼通过增加种子播前所需的时间和精力，或者通过增加种子对掠食者的可见性，来阻止或促进分散后的捕食。我们发现去翅的果实是首选，这表明萨马拉斯的存在使种子处理对于食肉动物而言更加昂贵。此外，我们发现含有最多翅种子的处理消耗的种子更少，因此没有证据表明萨马拉斯人更容易发现食草动物的种子。我们得出的结论是，机翼的存在可能会提供反掠夺性的好处，并有助于一次扩散。

更新日期：2020-01-22

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