Editing Biogeographic realm (section)

==Concept history==
The "biogeographic realms" of Udvardy{{r|Udvardy1975}} were defined based on taxonomic composition. The rank corresponds more or less to the [[phytochorion|floristic kingdoms]] and [[zoogeography|zoogeographic regions]].

The usage of the term "ecozone" is more variable. Beginning in the 1960s, it was used originally in the field of [[biostratigraphy]] to denote intervals of geological [[stratum|strata]] with fossil content demonstrating a specific ecology.<ref>{{Cite journal |last=Størmer |first=Leif |date=1966-01-01 |title=Concepts of stratigraphical classification and terminology |url=https://dx.doi.org/10.1016/0012-8252%2866%2990039-0 |journal=Earth-Science Reviews |volume=1 |issue=1 |pages=5–28 |doi=10.1016/0012-8252(66)90039-0 |issn=0012-8252|url-access=subscription }}</ref> In Canadian literature, the term was used by Wiken{{r|Wicken1986}} in macro-level [[regionalisation|land classification]], with geographic criteria (see [[Ecozones of Canada]]).{{r|Wicken1986|Scott1995}} Later, Schultz{{r|Schultz1988}} would use it with ecological and physiognomical criteria, in a way similar to the concept of [[biome]].

In the [[Global 200]]/WWF scheme,{{r|OlsonDinerstein1998}} originally the term "biogeographic realm" in Udvardy sense was used. However, in a scheme of [[BBC]],{{r|BBCecozones}} it was replaced by the term "ecozone".