Appendix C 



Definition Crosswalk 



(Vegetation Classification Terms) 



Major terms arc given with the applicable reference shown in parentheses. Terms having 

 similar definitions arc indented and given below with their applicable reference shown in 

 parentheses. 



Association 

 (4.5.6,9) 



In normal usage, this is a climax community type or potential natural 

 community. In riparian systems, because of their dynamic nature, a 

 true climax community may not have an opportunity to occur 

 (Youngblood et al. 1985). An association for a riparian environment 

 is therefore a plant community type representing the latest succes- 

 sional stage attainable on a specific hydrologically influenced surface 

 (Kovalchik 1987, Hansen 1989).Hansen (1989) uses the term 

 "riparian association" while Youngblood et al. (1985) chose the term 

 "potential stable community type" that approaches an association. 



Community Type 

 (1,4,5,6,7,9) 

 Association (2) 



J 



Dominant Species 

 (1,2,3,4.5,6,7,9,10) 



All sites in which the dominant and/or indicator species are similar. 

 The aggregation of all plant communities distinguished by floristic 

 and structural similarities in both overstory and undergrowth layers. 

 The method in which community types are determined varies be- 

 tween procedure. Generally some type of statistical procedure is 

 applied to composition or structural data that has been collected 

 through a stratified mapping procedure. The discreetness of the 

 mapping unit reflects the complexity of representative community 

 type. In procedure (7), Platts et al. (1988) has a unit called a com- 

 plex which may contain several community types that appear to be 

 associated to similar riverine sequences. Community type names 

 are generally determined from the name of the dominant or codomi- 

 nant species. Also, Dick-Peddie and Hubbard (1977) stress the 

 importance of using obligate riparian species when determining the 

 dominant species. This convention, however, is not specifically 

 stated in all of the riparian classification procedures. 



Those species in a stand that have the greatest foliar canopy volume 

 per unit area (9). Those species with at least 25 percent [30 percent 

 in (10)] canopy coverage in the tallest layer of a site (5). Therefore, 

 the method by which dominant species is collected should be known. 

 Also, Dick-Peddie and Hubbard (1977) stress the importance of 

 using obligate riparian species when determining the dominant 

 species. This convention, however, is not specifically stated in all of 

 the riparian classification procedures. 



J 



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