"Significant tree" means a tree with a caliper of at least 10 inches except dogwoods and vine maples are significant trees if they have a caliper of at least seven inches, and alders are not significant trees. For multiple stem trees such as vine maples, the caliper of the individual stems are added together to determine if a tree meets the minimum caliper for a significant tree. (Added by Amended Ord. 02-064, Dec. 9, 2002, Eff date Feb. 1, 2003; Amended by Amended Ord. 08-101, Jan. 21, 2009, Eff date Apr. 21, 2009).