biregional

Cave communities are tightly-knit, enduring structures that tend to channel local migration between contiguous countries; biregional communities are likely to merge migration between two distinct geographic regions (e.g., North Africa and Europe); and bridging communities have hub-and-spoke structures that tend to emerge dynamically from globe-spanning movements.

2016, Valentin Danchev, Mason A. Porter, “Heterogeneity of Global and Local Connectivity in Spatial Network Structures of World Migration”, in arXiv