[CANUFNET] Urban tree mortality rate

[Ethier Elaine]

Amelia, thank you so much for this added value to my pequinio knowledge!
I am looking forward to see with different tree professionals including some landscape architects in the province of Quebec to move on and catch up with what is promoted as scientific approaches. Tree economics in our province and main cities fall way behind. I worked with a economics forestry engineer student from UBC two years ago in Montreal for data on standing biomass in and around the emblematic Mount-Royal and the proposition to the developers made it that a review of architectural typography was done to change the design of buildings and of the street in order to go from 36% to 22% loss of the total biomass. The project became very interesting for city urban planning committees. So much to do.

Elaine Ethier
Plani Gester
Aménagement, foresterie urbaine

Le 30 mai 2016 à 07:15, Amelia Needoba <amelia at diamondheadconsulting.com<mailto:amelia at diamondheadconsulting.com>> a écrit :

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<tel:604.733.4886> ext. 33 F 604.733.4879<tel:604.733.4879>


On Tue, May 24, 2016 at 9:23 AM, Ethier Elaine <elaine.ethier at umontreal.ca<mailto: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><mailto: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<tel:905-771-5509> |  annmarie.farrugia at richmondhill.ca<mailto:annmarie.farrugia at richmondhill.ca><mailto:annmarie.farrugia at richmondhill.ca<mailto:annmarie.farrugia at richmondhill.ca>> |    RichmondHill.ca<http://richmondhill.ca><http://richmondhill.ca>

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