11. The city's geographic isolation has helped lead to the creation of a new local dialect. 12. This geographic isolation made communications and trade very poor. 13. Caxiuan?is noted for its rich biodiversity, geographic isolation , and a very low population density. 14. Geographic isolation and communication bottleneck coupled with insufficient infrastructure have restricted economic growth of the state.15. :: Geographic isolation doesn't necessarily mean reproductive isolation. 16. The neighborhood is distinctive because of its severe geographic isolation from the rest of the city. 17. Geographic isolation led to numerous local adaptations as this species spread after the last ice age.18. Because of their strong geographic isolation within a Saharan matrix, these species have a high conservation value. 19. Meanwhile, others claim that much of the earth's diversity could be due to speciation without geographic isolation . 20. South Africa is a late comer to the AIDS epidemic after decades of geographic isolation during apartheid.