11. They seem to occupy a similar ecological niche to hares. 12. Colonization happened for the same reason any organism migrates-to exploit an available ecological niche . 13. Bacteria occupy the ecological niche provided by both the tooth surface and gingival epithelium. 14. It occupies a similar ecological niche to some reed warblers. 15. They occupy a similar ecological niche to some reed warblers. 16. This gives them access to a whole ecological niche with minimal competition from other groups. 17. The emergence of South American organisms is due to the widening of that organisms'ecological niche . 18. :Yes, it's all about filling a particular ecological niche . 19. :: Per Graeme, I'm pretty sure this ecological niche is filled by kangaroos and wallabies. 20. This shows micro-differentiation, as each population of this species has adapted to its ecological niche .
