The first part of this article investigates the distribution and emergence of front rounded vowels (FRV) in the Portuguese dialect spoken on the Azorean island of Sao Miguel in light of data taken from the Ethnolinguistic Atlas of the Azores (ALEAc). The analysis confirms previous findings about the distribution of FRV. Additionally, the ALEAc shows that this phenomenon spreads beyond the well-known contexts of stressed positions. FRV also occur in unstressed syllables and the mid-front rounded vowel [o] alternates with its diphthongised counterparts [oj] and [ow]. This alternation calls for a reflection about the historical and articulatory background of [o] in Portuguese dialects. The extensive use of FRV opens up further research perspectives in terms of the sociolinguistic significance of the phenomenon. The second part of this article focuses on the sociohistorical background of the emergence of FRV in Portuguese dialects. The concept of the feature pool provides a framework for the processes of feature selection in a situation of linguistic contacts such as those preceding the settlement period of the Azores and subsequent contact on the islands. A combination of three different concepts of markedness helps understand why a highly unusual feature like FRV emerged and persists until today.

中文翻译：

---

亚速尔语葡萄牙语中的前圆元音：重新评估

本文的第一部分根据取自亚速尔群岛民族语言地图集（ALEAc）的数据，研究了在圣米格尔岛亚速尔群岛上说的葡萄牙语方言中前圆元音（FRV）的分布和出现。该分析证实了先前有关FRV分布的发现。此外，ALEAc还表明，这种现象扩展到了压力位置的众所周知的情况之外。FRV也出现在非重读音节中，中前圆元音[o]与双音元音[oj]和[ow]交替出现。这种交替要求对葡萄牙语方言中[o]的历史和发音背景进行反思。就这一现象的社会语言意义而言，FRV的广泛使用开辟了进一步的研究前景。本文的第二部分重点介绍了葡萄牙语方言中FRV出现的社会历史背景。特征池的概念为在语言接触情况下（例如在亚速尔群岛定居时期之前和岛上随后接触的情况）下的特征选择过程提供了框架。三种不同的标记概念相结合，有助于理解为什么像FRV这样的高度不寻常的功能出现并一直持续到今天。