In Partnership with ISA Michigan

The GAA is excited to partner with ISA Michigan on a series of webinars throughout the summer. The lineup includes excellent speakers on a range of topics. The first in the series is: 

Tree Appraisal and the Principle of Substitution

James Komen, Class One Arboriculture 

One of the foundational concepts in tree appraisal is the Principal of Substitution. A thing cannot appraise for more than a substitute of equivalent utility. Possibly the hardest step in applying this principal is selecting a “functional equivalent” to the subject tree or trees. When selecting the best appraisal technique, an appraiser must ask: “Is there a way the benefits provided by this tree could be replaced at a lower cost?” Depending on the facts of a case, the answer could be very different. This presentation reviews 10 court cases that applied the Principle of Substitution to tree appraisal.

About the speaker: 

Speaker James Komen is a consulting arborist in California specializing in risk assessment and tree appraisal. He helps clients make informed management decisions for individual trees and for tree inventories.

His work has been published in Arboriculture & Urban Forestry, Arboricultural Consultant, Palms, Ontario Arborist, and Western Arborist. He is an ISA TRAQ instructor and has taught workshops on tree appraisal around the U.S. and Canada.

Your personal Zoom link to access the webinar will be emailed separately by ISA Michigan two (2) days before the event. You WILL NOT receive the link at the time of registration

2024 Remaining Webinars:  

7/10/2024 COMPETING LEGAL INTERESTS IN STREET TREES
James Komen, Consulting Arborist, Class One Arboriculture 

7/24/2024 PLANT GROWTH REGULATORS (PGRs) IN TREE CARE
Blake Thilmony, R&D Project Manager, Rainbow Ecoscience 

8/20/2024 APPRAISING TREE LOSSES FOR INSURANCE ADJUSTERS
James Komen, Consulting Arborist, Class One Arboriculture 

8/21/2024 SPOTTED LANTERNFLY (SLF): THREATS AND MANAGEMENT STRATEGIES
Mark Ware, Arborologist, Rainbow Ecoscience