Definitions
Despite the large scale currency that the term has gained as a "catch all" in scientific literature, surprisingly little effort has been made to come up with a coherent definition. The most notable attempt is that of the ecologist K. Rohde, who has suggested that a vacant niche can be defined as the possibility that in ecosystems or habitats more species could exist than are present at a particular point in time, because many possibilities are not used by potentially existing species (Rohde 2005b). For a systematic review see: (Lekevičius, 2009).
Read more about this topic: Vacant Niche
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