[CANUFNET] Urban tree mortality rate

[Amelia Needoba]

Hi Elaine and Ann Marie,

Ann Marie...
There is research work out there on regionally, species and age specific
mortality rates for street trees. For example:
Richards, 1979
http://joa.isa-arbor.com/request.asp?JournalID=1&ArticleID=1612&Type=2
Nowak, 1990 http://www.nrs.fs.fed.us/pubs/jrnl/1990/ne_1990_nowak_001.pdf
Roman and Scatena, 2011
http://www.actrees.org/wp-content/uploads/2012/08/roman-scatena-2011-street-tree-mortality.pdf

Richards proposed a rule-of-thumb to achieve population stability for
'adapted, long-lived species' (in Syracuse, NY) by managing age diversity
in the population so that: 40% of trees under 20 cm dbh, 30% 20 - 40-cm
trees in early functional stage, 20% 40-60- cm functionally mature trees,
and 10% older trees with most of their functional live behind them
(Richards, 1982/83 Urban Ecology, 7, 159-171).

Elaine...
In terms of tree appraisals related to their amenity contribution, you've
probably already been pointed towards the CTLA tree appraisal system
https://www.asla.org/land/LandArticle.aspx?id=30959

There are also some other methods. For example, the City of Melbourne in
Australia uses an adapted Burnley method to assess tree amenity value (see
attached and
http://www.croydonconservation.org.au/wp-content/uploads/Burnley-method-Tree-value-pdf..pdf)
and adds the iTree calculated ecosystem services value on top .

Are those the kind of appraisals you are looking for or are you wanting to
assess actual biomass for replacement?

Best Regards,
Amelia.

-- 

*Amelia Needoba*
3551 Commercial Street | Vancouver | V5N 4E8
Diamond Head Consulting <http://www.diamondheadconsulting.com/>
<http://www.diamondheadconsulting.com/> P *604.733.4886 <604.733.4886>** ext.
33* F *604.733.4879 <604.733.4879>*


On Tue, May 24, 2016 at 9:23 AM, Ethier Elaine <elaine.ethier at umontreal.ca>
wrote:

> Hello,
>  I am looking for standing tree biomasse appraisals such as municipal
> models that could be presented to a Montreal group of professionals in
> relation to the Historic Mont-Royal. So far, nothing more than a few
> letters suggesting tertiary value of the tall specimens and a multiple
> factor of smaller trees to replace the loss. It's not enough to stimulate
> and bring awareness even to a knowledgeable scientific assistance.
>
> Thanking you in advance
>
> Elaine Ethier
> Plani Gester
> Aménagement, foresterie urbaine
>
> Le 24 mai 2016 à 11:58, Ann Marie Farrugia <
> annmarie.farrugia at richmondhill.ca<mailto:annmarie.farrugia at richmondhill.ca>>
> a écrit :
>
> Good morning,
>
> I’d like to ask if anyone is aware of any information or research that
> defines standard urban street tree mortality rates and/or tree replacement
> rates (pre/post EAB) .  Is there a rule of thumb the industry follows?
>
> Thanks in advance for your help,
> Ann Marie
>
>
> ________________________________________________________________
> Ann Marie Farrugia, B.E.S., MA.Sc., EP
> Manager of Natural Environment
> Environment Services  |  Environment & Infrastructure Services
> 905-771-5509 |  annmarie.farrugia at richmondhill.ca<mailto:
> annmarie.farrugia at richmondhill.ca> |    RichmondHill.ca<
> http://richmondhill.ca>
>
> <image001.jpg>
>
>
>
>
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