Abstract：
Speciation is a key evolutionary process that is not yet fully understood. Combining population genomic and ecological data from multiple diverging pairs of marine snails (Littorina) supports the search for speciation mechanisms. Placing pairs on a one-dimensional speciation continuum, from undifferentiated populations to species, obscured the complexity of speciation. Adding multiple axes helped to describe either speciation routes or reproductive isolation in the snails. Divergent ecological selection repeatedly generated barriers between ecotypes, but appeared less important in completing speciation while genetic incompatibilities played a key role. Chromosomal inversions contributed to genomic barriers, but with variable impact. A multidimensional (hypercube) approach supported framing of questions and identification of knowledge gaps and can be useful to understand speciation in many other systems.
摘要：
物种形成是尚未完全理解的关键进化过程。结合来自多个不同的海洋蜗牛对（Littorina）的种群基因组和生态数据，可以搜索物种形成机制。将对放置在一维形态连续体上，从未分化的种群到物种，掩盖了物种形成的复杂性。添加多个轴有助于描述蜗牛的物种形成路线或生殖隔离。分歧的生态选择反复产生生态型之间的障碍，但是在完成物种形成方面显得不那么重要，而遗传不相容性起着关键作用。染色体倒置导致了基因组障碍，但影响不定。多维（超立方体）方法支持问题的框架和知识差距的识别，并且可以用于理解许多其他系统中的物种形成。
