Differential geographical and ecological dynamics allow diversification of morphologically convergent giant bromeliads in the Atlantic Forest

Aim: This paper investigates evolutionary mechanisms that allow morphologically convergent lineages share the same geographical space. We compared the events occurred along the diversification of Karawata and Aechmea subgen. Chevaliera in Atlantic Forest by 1) verifying whether the climatic niches and habitats of Karawata and Aechmea subgen. Chevaliera are similar; 2) testing whether the two groups had the same pattern of colonization in the Atlantic Forest; and 3) evaluating whether they had the same evolutionary dynamics of environmental space occupation. We see the two bomeliad lineages as a model case to understand sympatric diversification in the Atlantic Forest biome.

Location: Brazilian Atlantic Forest

Taxon: Karawata and Aechmea subgen. Chevaliera (Bromeliaceae: Bromelioideae)

Methods: We explored differences in evolutionary dynamics between the lineages analyzing the divergence times, estimating ancestral ranges and habitats, testing niche similarity and evaluating shi...

研究目的：本研究旨在探究允许形态趋同演化支共享同一地理空间的进化机制。我们通过以下3项内容，对比大西洋森林中Karawata属与Aechmea亚属Chevaliera（Aechmea subgen. Chevaliera）的分化演化历程：1）验证Karawata属与Aechmea亚属Chevaliera的气候生态位与栖息地是否相似；2）检验这两个类群在大西洋森林中的拓殖模式是否一致；3）评估二者在环境空间占据方面的进化动态是否相同。我们将这两个凤梨科演化支作为理解大西洋森林生物群落同域物种分化的模式案例。

研究区域：巴西大西洋森林（Brazilian Atlantic Forest）

研究类群：Karawata属与Aechmea亚属Chevaliera（凤梨科（Bromeliaceae）：凤梨亚科（Bromelioideae））

研究方法：我们通过分析演化支间的进化动态差异，开展了如下工作：分析分化时间、估算祖先分布范围与栖息地、检验生态位相似性并评估……