Evolution within a language: environmental differences contribute to divergence of dialect groups

Table 1 Factors and patterns studied, and the evolutionary processes inducing linguistic divergence

	Dialect groups	Municipal dialects
Studied factors
Geographical distance	x	x
Environmental differences	x	x
Cultural differences	x	x
Difference in administrative history		x
Studied patterns
IBD	x	x
IBE	x	x
IBC	x	x
IBA		x
Evolutionary processes
IBD – neutral	x
IBE – adaptive	x

Evolutionary processes were inferred from the studied patterns. Environmental and cultural factors include several different variables (Additional file 1: Table S1). Administrative history is a compilation of 16 sets of administrative borders from different historical times

ISSN: 2730-7182