Jack‐of‐all‐trades paradigm meets long‐term data: Generalist herbivores are more widespread and locally less abundant
Jack‐of‐all‐trades paradigm meets long‐term data: Generalist herbivores are more widespread and locally less abundant
复制标题
万能的范式与长期数据的结合：通才食草动物分布更广，但局部数量较少
DOI：
10.1111/ele.13972
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发表时间：
2022
期刊：
影响因子：
8.8
通讯作者：
Novotny, ed., Vojtech
中科院分区：
文献类型：
--
作者：
Sudta, Chanchanok;Salcido, Danielle M.;Forister, Matthew L.;Walla, Thomas R.;Villamarín‐Cortez, Santiago;Dyer, Lee A.;Novotny, ed., Vojtech
昆虫食草动物是相对专业化的。为什么会这样还不清楚。我们使用厄瓜多尔毛虫-植物相互作用的18年数据集来检验关于当地丰度和饮食专业化之间关联的假设。我们的数据包括毛毛虫与植物之间的关联，包括标准化的基于样地的样本和毛毛虫的一般收集，从而可以在空间尺度上对1917种形态物种的饮食宽度和丰度进行估计。我们发现，专业化程度更高的毛毛虫在局部比通才更丰富，这与“样样通，样样不精”假说的关键组成部分是一致的。随着物种饮食宽度的增加，多面手在任何一个地点都不那么丰富，但它们在整个景观中占有更广泛的份额，这一模式可以反映高植物β多样性，并且与替代中性假设一致。我们发现，更多的特化物种可能既罕见又常见，这凸显了特化的生态复杂性。
Insect herbivores are relatively specialized. Why this is so is not clear. We examine assumptions about associations between local abundance and dietary specialization using an 18‐year data set of caterpillar–plant interactions in Ecuador. Our data consist of caterpillar–plant associations and include standardized plot‐based samples and general collections of caterpillars, allowing for diet breadth and abundance estimates across spatial scales for 1917 morphospecies. We find that more specialized caterpillars are locally more abundant than generalists, consistent with a key component of the ‘jack of all trades, master of none’ hypothesis. As the diet breadth of species increased, generalists were not as abundant in any one location, but they had broader occupancy across the landscape, which is a pattern that could reflect high plant beta diversity and is consistent with an alternative neutral hypothesis. Our finding that more specialized species can be both rare and common highlights the ecological complexity of specialization.