[CANUFNET] Optimal Tree Health Condition Rating

[Alex Wick]

Bruno,

First, you need to decide (or if you've decided already, elucidate) the
percentage scale you mentioned: i.e. is the "percentage" the chance
of surviving 1 year more, 10 years more, a measure of vigor, % of optimal
growth for that species under specific location and soil conditions, etc.
Front here, you can seek to improve it, but even then, I'd recommend
against developing a "target percentage" instead, seek to incrementally
reduce the mortality rate, while realizing that a couple of hot summers can
significantly affect tree health and mortality rates.
For the average citizen, it's easier to "bin" trees using a Likert scale
(i.e. 1-5), with 1 being dead or imminently dying, and 5 being perfectly
healthy.

Hope this helps, and happy to discuss further.

Sincerely,

*Alex Wick, *CEO
Forester/Founder
Cascadia Carbon
www.carboncodex.app <https://carboncodex.app/>
www.cascadiacarbon.com <http://cascadiacarbon.com/>
www.carbonaut.app



On Thu, Jan 6, 2022 at 12:52 PM Bruno PAQUET via CANUFNET <
canufnet at list.web.net> wrote:

> Hello everyone,
>
> Best wishes for the year ahead with hopefully less COVID considerations.
>
> Being responsible for the urban forest of a borough on the Montreal
> Island, I am looking for references on the optimal target rating for the
> health condition of public trees.
>
> A recent study I commissioned (2021) showed, based on a sampling of 10% of
> our public tree population, that the condition rating of our trees along
> streets and in parks was 67%.
>
> I have consulted many documents and have not found anything specific about
> a target for such an optimal rating, which would be recognized by the
> community as desirable. A target score of 100% would obviously be
> completely unrealistic but what should we aim for, 80, 85 or 90%.
>
> Your comments would be appreciated.
>
> Thanks
>
>
> *Bruno Paquet*
>
> bruno.paquet at montreal.ca
>
>
>
>
>
>
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