• Lowland tropical bryophytes have been perceived as excellent dispersers. In such groups, the inverse isolation hypothesis proposes that spatial genetic structure is erased beyond the limits of short‐distance dispersal. Here, we determine the influence of environmental variation and geographic barriers on the spatial genetic structure of a widely dispersed and phylogenetically independent sample of Amazonian bryophytes.
• Single nucleotide polymorphism data were produced from a restriction site‐associated DNA sequencing protocol for 10 species and analyzed through F‐statistics and Mantel tests.
• Neither isolation‐by‐environment nor the impact of geographic barriers were recovered from the analyses. However, significant isolation‐by‐distance patterns were observed for 8 out of the 10 investigated species beyond the scale of short‐distance dispersal (> 1 km), offering evidence contrary to the inverse isolation hypothesis.
• Despite a cadre of life‐history traits and distributional patterns suggesting that tropical bryophytes are highly vagile, our analyses reveal spatial genetic structures comparable to those documented for angiosperms, whose diaspores are orders of magnitude larger. Dispersal limitation for tropical bryophytes flies in the face of traditional assumptions regarding their dispersal potential, and suggests that the plight of this component of cryptic biodiversity is more dire than previously considered in light of accelerated forest fragmentation in the Amazon.

中文翻译：

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热带隐秘游戏揭示了什么？亚马逊苔藓植物中的强遗传结构。

• 低地热带苔藓植物被认为是极好的分散剂。在这样的群体中，逆隔离假设提出，空间遗传结构被消除，超出了短距离分散的范围。在这里，我们确定环境变化和地理障碍对亚马逊苔藓植物的广泛分布和系统发育独立的样本的空间遗传结构的影响。
• 单核苷酸多态性数据是从10个物种的限制性酶切位点相关的DNA测序协议中获得的，并通过F统计和Mantel测试进行了分析。
• 从分析中未发现环境隔离或地理障碍的影响。但是，在短距离扩散范围（> 1 km）之外的10个被调查物种中，有8个观察到了显着的按距离隔离模式，这提供了与反向隔离假设相反的证据。
• 尽管有大量的生活史特征和分布模式表明热带苔藓植物高度易变，但我们的分析显示，空间遗传结构与被子植物大为增加数个数量级的被子植物相当。热带苔藓植物的散布限制在面对有关其散布潜力的传统假设时飞过，并表明，由于亚马逊地区森林加速破碎，隐性生物多样性这一组成部分的困境比以前更加可怕。