Resprouting is a plant persistence strategy in response to disturbance or stressful environmental conditions. Resprouters can dominate in stressful environments such as tropical dry forests (TDFs), but our knowledge of resprouting in TDFs is limited. Here, using a dataset of forest inventories in 16 TDF fragments (covering 15,642 trees and 321 species), we investigated patterns of resprouting in ecosystems subject to substantial seasonal water stress. We focused on two resprouting metrics: the proportion of trees that are multistemmed (resprouting frequency) and the number of stems per tree. In addition, we investigated the relative importance of environmental factors, taxonomic identity, and evolutionary history in resprouting response. Taxa with low to medium resprouting frequencies (17.19%–40.2%) are the most prevalent in TDF, compared to non-resprouters and high-frequency resprouters. Overall, resprouting ability appears to be an intrinsic trait that varies in response to environmental conditions but only within a range constrained by taxonomic identity. However, we found no phylogenetic signal above the genus level for any resprouting variables. Thus, the variation in resprouting across TDF lineages likely has been shaped by divergence between closely related taxa and convergence between distantly related ones, reflecting the specific environmental and disturbance factors to which they have been subjected.

中文翻译：

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超越“再发芽与非再发芽”二分法：关于热带干燥森林树木再发芽的普遍性和进化指纹

再发芽是植物应对干扰或应激环境条件的持久策略。再发芽者可以在热带干燥森林（TDF）等压力环境中占据主导地位，但我们对 TDF 中再发芽的了解有限。在这里，我们使用 16 个 TDF 片段的森林清单数据集（涵盖 15,642 棵树和 321 个物种），研究了遭受严重季节性水分胁迫的生态系统中的再发芽模式。我们关注两个重新发芽指标：多茎树木的比例（重新发芽频率）和每棵树的茎数量。此外，我们还研究了环境因素、分类学特性和进化历史在重发反应中的相对重要性。与非再萌发者和高频再萌发者相比，低到中等再萌发频率的类群 (17.19%–40.2%) 在 TDF 中最为普遍。总体而言，再发芽能力似乎是一种内在特征，会随环境条件而变化，但仅在受分类学特性限制的范围内变化。然而，我们没有发现任何重发变量的属水平以上的系统发育信号。因此，TDF谱系之间重新萌芽的变化可能是由密切相关的分类单元之间的差异和远缘相关的分类单元之间的趋同所决定的，反映了它们所受到的特定环境和干扰因素。