Documentation and Conservation of Champion Big Trees in Urban Forests

Presented at the North Carolina Community Webinar hosted by North Carolina Urban Forest Council on November 14, 2023.

Transcript

1. P. Eric Wiseman, PhD Associate Professor of Urban and Community Forestry Dept. of Forest Resources and Environmental Conservation Virginia Tech NC Community Tree Webinar • November 14, 2023 Documentation and Conservation of Champion Big Trees in Urban Forests vtuf@vt.edu @vtarborist linktr.ee/EricWiseman Quercus muehlenbergii** Rockingham Co. 66’ 113’ 287” 381 pts.
2. Presentation Outline o Background on champion big tree programs o Methods of measuring and scoring big trees o Common threats to big trees in urban areas o Arboriculture for big tree conservation Goal: Improve your knowledge of champion big tree documentation and conservation. Quercus laurifolia** City of Chesapeake 77’ 81’ 321” 418 pts. NC Community Tree Webinar • November 14, 2023 02  31
3. Background on champion big tree programs Frederick Wilson Besley Source: www.stateforesters.org/2021/09/15/mr-besleys-forest- the-story-of-marylands-first-state-forester • Maryland’s first state forester • Graduate of Yale School of Forestry and mentored by Gifford Pinchot • Led creation of Maryland’s Roadside Tree Law in 1914 • Led creation of Maryland’s Big Tree Program in 1925 • Invented the measurement and scoring system used today nationally for crowning champion big trees NC Community Tree Webinar • November 14, 2023 03  31
4. Background on champion big tree programs Source: archive.org/details/sim_american-forests_1940-09_46_9 “The American Forestry Association heartily endorses the appeal by Mr. Joseph L. Stearns for the discovery and preservation of the largest specimens of outstanding American tree species.” - September, 1940 NC Community Tree Webinar • November 14, 2023 04  31
5. Background on champion big tree programs Lillian M. Cromelin • Associate editor of American Forests Magazine • Created the program for registering big tree champions in 1940 NC Community Tree Webinar • November 14, 2023 05  31
6. Background on champion big tree programs In 1941, 77 champion big trees were registered in the inaugural ‘American Big Trees Report’ of American Forests Source: www.americanforests.org/article/75-years-of-champions Source: archive.org/details/sim_american-forests_1941-05_47_5 Source: archive.org/details/sim_american-forests_1941-10_47_10 NC Community Tree Webinar • November 14, 2023 06  31
7. Background on champion big tree programs 1940: American Big Trees Report 1961: The Social Register of Big Trees 1978: The National Register of Big Trees 2014: The National Register of Champion Trees NC Community Tree Webinar • November 14, 2023 07  31
8. Background on champion big tree programs 2021 National Register • 563 champion and co-champion trees • 491 native and naturalized species • 40 states have at least one champion tree • Top-5 states: Virginia (93) Florida (86) Texas (63) Arizona (47) California (44) Source: www.americanforests.org/champion-trees/champion-trees-registry NC Community Tree Webinar • November 14, 2023 08  31
9. Background on champion big tree programs Source: naturalresources.tennessee.edu/search-underway-for-national-champion-tree-program-director NC Community Tree Webinar • November 14, 2023 09  31
10. Virginia’s big tree program To promote the care and appreciation of trees – big and small. Document the largest trees in the state and provide resources to aid in their protection and care. Maclura pomifera** Charlotte Co. 65’ 93’ 328” 416 pts. Photo credit: A. Cassell NC Community Tree Webinar • November 14, 2023 10  31
11. Virginia’s big tree program NC Community Tree Webinar • November 14, 2023 11  31
12. Virginia’s big tree program NC Community Tree Webinar • November 14, 2023 12  31
13. Virginia’s big tree program Source: www.vaforestry.org/virginia-forests-magazine NC Community Tree Webinar • November 14, 2023 13  31
14. Virginia’s big tree program Big Tree Interns Big Tree Volunteers Quercus pagoda** Portsmouth City 114’ 138’ 331” 480 pts. NC Community Tree Webinar • November 14, 2023 14  31
15. Virginia’s big tree program NC Community Tree Webinar • November 14, 2023 15  31
16. Virginia’s big tree program NC Community Tree Webinar • November 14, 2023 16  31
17. Virginia’s big tree program NC Community Tree Webinar • November 14, 2023 17  31
18. Measuring and scoring big trees 1. It’s living 2. It’s an eligible species 3. It’s the largest of its species 4. It’s been verified by an expert Champions: one tree with the most total points Co-Champions: two trees that are within 3 points or 3% of each other NC Community Tree Webinar • November 14, 2023 Robert T. (Bob) Leverett 18  31
19. Measuring and scoring big trees WHAT TO TAKE WITH YOU o Reel tape o Pin flags o Plumb bob o Yard stick, clinometer, or laser hypsometer o GPS unit o Camera NC Community Tree Webinar • November 14, 2023 19  31
20. Measuring and scoring big trees TRUNK CIRCUMFERENCE Composite functional circumference measurement on multi-trunk form when it is atypical for the species Composite circumference at 4.5’ = 185” (green) NC Community Tree Webinar • November 14, 2023 20  31
21. Measuring and scoring big trees TREE HEIGHT The tree height equals your horizontal distance (HD) from the tree plus your height (HT) Law of Similar Triangles NC Community Tree Webinar • November 14, 2023 21  31
22. Measuring and scoring big trees TREE HEIGHT NC Community Tree Webinar • November 14, 2023 22  31
23. Measuring and scoring big trees AVERAGE CROWN SPREAD NC Community Tree Webinar • November 14, 2023 23  31
24. Measuring and scoring big trees SCORE CALCULATION o Is it an eligible tree? Eligible species, Eligible trunk form o Measure trunk circumference at 4.5’ above ground line*: ____(inches) o Measure tree height from ground line to highest branch: ____(feet) o Measure average crown spread (1st max. ⊥ 2nd max.): ____(feet) 150 100 (90’/70’) 80 Circumference (1 point per inch) + Height (1 point per foot) + Crown spread (¼ point per foot) Big Tree Score Total 150 points 100 points 20 points 270 points NC Community Tree Webinar • November 14, 2023 24  31
25. Threats to big trees in urban areas The Ravages of Time Quercus bicolor* Loudoun Co. 85’ 110’ 237” 350 pts. NC Community Tree Webinar • November 14, 2023 25  31
26. Threats to big trees in urban areas Extreme Weather Quercus falcata** Sussex Co. 92’ 114’ 321” 442 pts. NC Community Tree Webinar • November 14, 2023 26  31
27. Threats to big trees in urban areas Pests and Diseases Fraxinus pennsylvanica** Fauquier Co. 73’ 72’ 252” 343 pts. NC Community Tree Webinar • November 14, 2023 27  31
28. Threats to big trees in urban areas Neglect and Indifference Quercus alba** Brunswick Co. 86’ 113’ 337” 451 pts. NC Community Tree Webinar • November 14, 2023 28  31
29. Threats to big trees in urban areas Arboricultural Malpractice Quercus laurifolia City of Chesapeake 79’ 70’ 247” 344 pts. NC Community Tree Webinar • November 14, 2023 29  31
30. Arboriculture for big tree conservation • Alert the community to champion tree distinction • Entrust qualified arborists for big tree care • Frequent inspections and health check-ups • Minimize disturbance and landscape change • Protect a large critical root zone • Lightning protection • Tree support systems • Judicious crown reduction for managing loads on decayed branches, trunks, and roots NC Community Tree Webinar • November 14, 2023 30  31
31. Documentation and Conservation of Champion Big Trees in Urban Forests P. Eric Wiseman, PhD Associate Professor of Urban and Community Forestry Dept. of Forest Resources and Environmental Conservation Virginia Tech vtuf@vt.edu @vtarborist linktr.ee/EricWiseman NC Community Tree Webinar • November 14, 2023 31  31