[CANUFNET] Appraisal of trees and estimating the age of trees

[Michael Richardson]

Aging trees can be done quickly with a Resistograph by Rinntech and some
soft ware, or by increment core, sanding and a microscope.

Aging trees less than 100cm diameter can be quickly and easily achieved
with the Resistograph (one minute per drilling) and a couple of minutes of
data analysis.

The oldest known Sugar Maples in Ontario is aged at 330 years.  There are
lots of examples of trees up to 200 years.

If you are looking at a large Sugar Maple on the road edge it likely dates
to the 1920 and Edmund Zavitz's first tree planting program.

Michael

> I understand the use of incremental bore samples and I do know that age
> does not matter, to those of us who know trees and are "in the choir". But
> is seems that to the lay person, age comes into play when looking at
> preservation.
> How many times have we heard, "save that tree because it is 200 years
> old"? We do not often hear "save that tree because it has a canopy cover
> of 70 square meters" which is often the case for older larger trees. Or
> how about "save that tree because it is a tree". How many larger trees are
> saved through that argument?
> As a municipal arborist, I know the difficulties of preserving are older
> larger trees, especially when towns in fill through development of older
> heritage sites or areas. 
> Knowing size, AGE, canopy coverage, root coverage and the benefits of
> preserving these larger, older trees can be helpful in our tool boxes for
> preserving healthy mature trees. The lay person needs to know all this,
> but we always look at age before the other tools. Tell me if I am wrong?
>
>
> Mark Carroll
> ISA Certified Arborist, Qualified Arborist Tech
> All around nice guy
> Taking our environment first
> Thanks for connecting...
>
>
>
>   On Fri., 19 Mar. 2021 at 11:23 a.m., Jalil
> Hashemi<jalil.hashemi at oakville.ca> wrote:   #yiv9557263681
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>
> Hi Mark,
>
>  Â 
>
> Search Dr. Paula Pepper under growth algorithm and Allometric equations
> subjects and you might find many helpful research papers done in US
> modeling the correlation between tree size (DBH, height) and Age. There
> were two researches completed by two Master of Forest Conservation
> graduates from University of Toronto in Oakville, Canada. One published in
> Urban Forestry and Urban Greening.
>
>  Â 
>
> However, as these correlations can be heavily altered by various factors
> (soil texture, volume, weather, available growth space, location, etc.),
> your estimated age will not be as accurate as taking a core sample using
> increment borer. So depending on how accurate you want to be in your
> calculation/estimation, you might choose either the equations or increment
> borer. Â Â 
>
>  Â 
>
> Please see the link and the attachment.
>
> 1.      Allometric equations for urban ash trees (Fraxinus spp.) in
> Oakville, Southern Ontario, Canada By: Claudia Alzate
>
> Urban Forestry & Urban Greening
>
> Volume 13, Issue 1, 2014, Pages 175-183
>
> https://www.fs.fed.us/psw/publications/peper/psw_2014_peper001.pdf
>
>  Â 
>
> 2.      Growth Dimensions for Maple Trees in the Town of Oakville
> by: Suzanne Spyron
>
>  Â 
>
> See attached
>
>  Â 
>
> Thanks,
>
>  Â 
>
> Jalil
>
>  Â 
>
> Jalil Hashemi,RPF
> Manager - Forestry Services
> Parks & Open Space
> Town of Oakville | 905-845-6601, ext.3848 |f: 905-338-4227
> |www.oakville.ca
>
>
>
>
> Vision: To be the most livable town in Canada
> Please consider the environment before printing this email.
> http://www.oakville.ca/privacy.html
>
>
>
> From: CANUFNET <canufnet-bounces at list.web.net>On Behalf Of Mark Carroll
> via CANUFNET
> Sent: March 17, 2021 10:35 PM
> To: Canadian Urban Forest Network <canufnet at list.web.net>
> Cc: Mark Carroll <environment1st at rogers.com>
> Subject: [CANUFNET] Appraisal of trees and estimating the age of trees
>
>  Â 
>
> SECURITY CAUTION: This email originated from outside of The Town of
> Oakville. Do not click links or open attachments unless you recognize the
> sender and know the content is safe.
>
> To all
>
>  Â 
>
> I am looking for some help. Does anyone know of a way to positively
> estimate the age of a tree? I have some old Acer saccharum I would
> estimate at 130 years of age. Is there a registry of size, area and specie
> of tree that can identify the age of trees? I have 2 that I am dealing
> with, one is 90cm DBH (130 years old) and the other is 54cm DBH (80 years
> old ).
>
>  Â 
>
> Thanks for any help....
>
> Mark Carroll
> ISA Certified Arborist, Qualified Arborist Tech
>
> TRAQ Certified
> Taking our environment first
> Thanks for connecting...
>
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