<br><font size=2 face="sans-serif">RE: Tree species selection / Native
trees</font>
<br>
<br><font size=2 face="sans-serif">Native tree use in the urban landscape
is quite a complex issue. Native trees are slowly becoming mainstream
as nurserymen recognize the positive attributes, popular demand for, and
profitability of producing more of these species. </font>
<br>
<br><font size=2 face="sans-serif">Using native trees in the urban landscape
has great merit; one of the most important points to consider is the blending
of the urban environment into rural landscapes. However, I don't
think native trees will ever be exclusively used in urban settings. I
have heard talk in different municipalities of pressure to plant only native
tree species. </font>
<br>
<br><font size=2 face="sans-serif">Many areas have very limited resources
when choosing from native species, as Ian Wilson of Kelowna has pointed
out with an excellent example. Other areas may have more species
to choose from ,but the species are ill suited to survive the ecological
conditions of urban life. </font>
<br>
<br><font size=2 face="sans-serif">It is imperative to consider the urban
environment as a different habitat; a different ecozone, an altogether
unique ecological niche. Biologically Appropriate Material (BAM),
as previously referred to, is an excellent model to follow. The key
is in the word "Appropriate". That is where sound management
and insight pull everything together. </font>
<br>
<br><font size=2 face="sans-serif">It is imperative to consider the "City"
as an ecotype of it's own. Many people consider nature (forest, field,
desert, ocean) to be "natural" and cities to be "unnatural".
The reality is that people, human beings, are natural too; therefore
the actions of people are a natural consequence. The fact that humans
build cities is as natural as birds building nests. When people live
in close proximity to each other, they like to modify the local surroundings
to suit themselves. </font>
<br>
<br><font size=2 face="sans-serif">Since the cities are their own unique
ecosystem, there are native trees from the "City Ecotype". There
are tree species that are native to the urban and sub-urban ecosystem.
Ginkgo trees are essentially extirpated/extinct in what was once
it's native habitat, but they are native to areas where humans culture
them. Take the apple tree as another example; this tree has been
bred into so many different forms specifically for human use. Ecologically,
the apple tree follows human civilization around. The golden delicious
is native to human modified environments. </font>
<br>
<br><font size=2 face="sans-serif">We must consider the city as a different
ecotype to truly fit cities into our environmental planning. This
is how we must plan the urban forests of the future. We design the
non-living infrastructure of our cities to complement human life. We
also do the same with the living infrastructure wherever we can. </font>
<br>
<br><font size=2 face="sans-serif">We must design our urban forests and
green spaces to meet the needs of humans while blending the "City
Ecotype" into the surrounding ecosystems.</font>
<br>
<br><font size=2 face="sans-serif">Do no harm, and preserve the purity
of life. </font>
<br><font size=2 face="sans-serif">________________________<br>
Brian Geerts <br>
Urban Forestry Technician<br>
City of Brantford <br>
Parks & Recreation Department<br>
1 Sherwood Drive<br>
Brantford, ON N3T 1N3<br>
519.756.1500 x5511<br>
Fax 519.756.4893 <br>
bgeerts@brantford.ca</font>
<br>
<br>
<br>
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<td width=40%><font size=1 face="sans-serif"><b>canufnet-request@list.web.net</b>
</font>
<br><font size=1 face="sans-serif">Sent by: canufnet-bounces@list.web.net</font>
<p><font size=1 face="sans-serif">12/05/2008 12:00 PM</font>
<table border>
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<div align=center><font size=1 face="sans-serif">Please respond to<br>
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<div align=right><font size=1 face="sans-serif">cc</font></div>
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<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td valign=top><font size=1 face="sans-serif">CANUFNET Digest, Vol 49,
Issue 4</font></table>
<br>
<table>
<tr valign=top>
<td>
<td></table>
<br></table>
<br>
<br>
<br><font size=2><tt>Send CANUFNET mailing list submissions to<br>
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<br>
To subscribe or unsubscribe via the World Wide Web, visit<br>
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When replying, please edit your Subject line so it is more specific<br>
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<br>
<br>
Today's Topics:<br>
<br>
1. FW: CANUFNET Digest, Vol 49,
Issue 3 Re 1. Re: Urban Tree<br>
Species Selection (Fisher, Brian) (Boysen, Barb (MNR))<br>
2. "Urban" forestry publications on insects and diseases
(Steve Finn)<br>
3. Re: FW: CANUFNET Digest, Vol 49,
Issue 3 Re 1. Re: Urban<br>
Tree Species Selection (Fisher, Brian) (Fisher, Brian)<br>
4. Re: FW: CANUFNET Digest, Vol 49,
Issue 3 Re 1. Re: Urban<br>
Tree Species Selection (Fisher, Brian) (Ian Wilson)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Thu, 4 Dec 2008 14:55:43 -0500<br>
From: "Boysen, Barb (MNR)" <barb.boysen@ontario.ca><br>
Subject: [CANUFNET] FW: CANUFNET Digest, Vol 49,
Issue 3 Re 1. Re:<br>
Urban Tree Species Selection (Fisher, Brian)<br>
To: <canufnet@list.web.net><br>
Message-ID:<br>
<94E461E26D325A4B95B3E2339FF5C73C0773E68E@CTSPITDCEMMVX16.cihs.ad.gov.on.ca><br>
<br>
Content-Type: text/plain; charset="US-ASCII"<br>
<br>
Hello,<br>
<br>
I can't resist replying re the support of native species being called<br>
dogmatic. I hope such arguments, surely well meaning if annoying,
won't<br>
prevent people from looking at the bigger picture. One species'<br>
significant trouble under climate change impacts shouldn't be a reason<br>
to throw out the whole suite of other choices.<br>
<br>
One of the reasons we promote native species is that they are proven<br>
performers on the landscape - they are adapted to the local sites,<br>
climates and communities of species. Also in an urban setting promoting<br>
natives helps the urban island contribute to the gene flow between<br>
adjacent natural areas, rather than act as a barrier, or worse<br>
contribute exotic material. That material rarely shows itself to
be a<br>
problem immediately, usually only after it is now difficult and<br>
expensive to eradicate. Problems can include poor growth, short life<br>
span, reduced diversity, and increased insect and disease problems;<br>
never mind the really harmful effects if they invade native communities<br>
with the problems of hybridizing and reducing ecological functions.<br>
<br>
Where the urban sites themselves are highly disturbed and one could<br>
argue no longer 'native' (or even at all suitable for a tree), the<br>
introduction of exotics is still an experiment - what is the origin of<br>
the clones or populations you are introducing; how different is the<br>
source from your site, will it be long lived, healthy? <br>
<br>
Why not experiment with natives on such sites. Or restore the sites?<br>
<br>
Henry Kock of the University of Guelph used to talk about biologically<br>
appropriate material (BAM). The idea is to assess what constitutes<br>
biologically appropriate material for any particular situation. For<br>
example, projects designed to naturalize areas should use seed and/or<br>
propagules of adapted sources of native plants. An example of<br>
inappropriate material would be the establishment of an exotic that<br>
spreads (or hybridizes with native species) next to a natural area.<br>
There may be cases when the use of an exotic is appropriate - when<br>
native material to meet the planting objective is not yet available. An<br>
example might be the planting of exotic cultivars that tolerate the<br>
stressful conditions of an urban environment. <br>
<br>
Here's some of his words: <br>
"BAM - By only growing species that are genetically fit ... i.e. <br>
- adapted to the local environment, <br>
- of sufficient genetic diversity to avoid the pitfalls of
clones,<br>
and <br>
- appropriate to the objectives of the planting project<br>
can we ensure the success of our planting efforts and therefore the<br>
benefits that we expect from a healthy forest - rural or urban. Consider<br>
the consequences for the original planting but also for the subsequent<br>
generations- the very long term impact your selections will have. "<br>
<br>
Use these principles no matter what species you are considering - but<br>
please consider the natives first.<br>
<br>
OR - is the problem really that native species aren't as readily<br>
available yet, in the preferred stock types as the exotic clones and<br>
grafts that tend to be so mass produced?<br>
<br>
In that case we can all dare to be part of the solution rather than keep<br>
supporting the problem.<br>
<br>
Barb Boysen, Coordinator <br>
Forest Gene Conservation Association <br>
Suite 233, 266 Charlotte Street <br>
Peterborough, ON K9J 2V4 <br>
<br>
Tel: (705) 755-3284 <br>
Fax: (705) 755-3292 <br>
Cell: (705) 875-7150 <br>
<br>
barb.boysen@ontario.ca<br>
<br>
www.fgca.net <br>
<br>
www.ontariosnaturalselections.org <br>
<br>
<br>
-----Original Message-----<br>
From: canufnet-bounces@list.web.net<br>
[mailto:canufnet-bounces@list.web.net] On Behalf Of<br>
canufnet-request@list.web.net<br>
Sent: December 4, 2008 12:00 PM<br>
To: canufnet@list.web.net<br>
Subject: CANUFNET Digest, Vol 49, Issue 3<br>
<br>
Send CANUFNET mailing list submissions to<br>
canufnet@list.web.net<br>
<br>
To subscribe or unsubscribe via the World Wide Web, visit<br>
http://list.web.net/lists/listinfo/canufnet<br>
or, via email, send a message with subject or body 'help' to<br>
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When replying, please edit your Subject line so it is more specific<br>
than "Re: Contents of CANUFNET digest..."<br>
<br>
<br>
Today's Topics:<br>
<br>
1. Re: Urban Tree Species Selection (Fisher, Brian)<br>
2. City of Saskatoon Pest Management Supervisor Position<br>
(McLeod, Geoff (IS - Parks))<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Wed, 3 Dec 2008 09:31:25 -0800<br>
From: "Fisher, Brian" <Brian.Fisher@bchydro.com><br>
Subject: Re: [CANUFNET] Urban Tree Species Selection<br>
To: <spcushing@yahoo.ca>, "Canadian Urban Forest
Network"<br>
<canufnet@list.web.net><br>
Message-ID:<br>
<br>
<64B39DDD27287C4DB8A3448A44A8DF250548A097@EDMBCHMBX2V2.bchydro.adroot.bc<br>
hydro.bc.ca><br>
<br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
I have a copy of an old manual - (1993) <br>
Called STREET TREE FACTSHEETS<br>
Library of Congress Catalog Card Number 92.72203<br>
ISBN 1-883956.00.5<br>
Published by Penn State - College of Agricultural Sciences<br>
with support of USDA , Penn Dept.of Env. Res (Bureau of Forestry)<br>
Pennsylvania Electric Energy Research Council<br>
and Pennsylvania Nurserymen's Association.<br>
<br>
It has very good information on more than 200 species & cultivars and<br>
would merit some updating if someone wanted to pursue that.<br>
<br>
I am also finding that at least in our area, there seems to be an<br>
increasing pressure for<br>
Native trees from various ad hoc groups. While I certainly want to avoid<br>
true invasives, I think that the approach is often<br>
dogmatic and offers little that is truly helpful.<br>
In a Province where more than half a billion (Yes that's a B) native<br>
pines (95% of the pines in the province) have been<br>
killed by Mountain Pine Beetle, I think we need to be looking at<br>
importing new species, not insisting on natives.<br>
Regards,<br>
Brian <br>
<br>
<br>
<br>
-----Original Message-----<br>
From: canufnet-bounces@list.web.net<br>
[mailto:canufnet-bounces@list.web.net] On Behalf Of Stephen Cushing<br>
Sent: 2008, December 01 4:44 PM<br>
To: Canadian Urban Forest Network<br>
Subject: [CANUFNET] Urban Tree Species Selection<br>
<br>
Hello everyone, <br>
<br>
I am doing research on urban tree species selection, based on<br>
environmental stresses. I am trying to find examples of municipalities<br>
or organizations that have developed, use selection criteria, or follow<br>
a defined process in selecting urban trees. Other than providing lists<br>
of trees to choose from, most municipal websites and documents do not<br>
outline how urban foresters are selecting the trees they do. <br>
<br>
Any insight would be greatly appreciated. <br>
<br>
Cheers,<br>
Stephen Cushing<br>
MLA Candidate 2009. <br>
<br>
<br>
<br>
<br>
<br>
<br>
------------------------------<br>
<br>
Message: 2<br>
Date: Thu, 4 Dec 2008 13:21:38 -0800<br>
From: Steve Finn <Steve_Finn@bcit.ca><br>
Subject: [CANUFNET] "Urban" forestry publications on insects
and<br>
diseases<br>
To: <canufnet@list.web.net><br>
Message-ID:<br>
<OFEA298402.B89C8A25-ON88257515.00749CFD-88257515.0075568D@bcit.ca><br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
<br>
Hi list members:<br>
<br>
As our forest ecosystem program winds down and our new sustainable resource<br>
management program (http://www.bcit.ca/construction/srm/) , which has a<br>
environmental and community planning option starts, I am looking
at<br>
modifying my forest insect and disease courses to meet the needs of our
new<br>
students. Previously the courses were traditional forestry focused.<br>
<br>
I am looking for recommendations of good references that I can use to put<br>
more of an urban forestry focus on insects and disease, particularly<br>
western Canada focused. Other than the ISA publications, any others come
to<br>
mind? If you have some good on-line documents, that is great as well.<br>
<br>
Thanks<br>
Steve<br>
BCIT SRM<br>
<br>
Steve Finn M.F., R.P.F.<br>
Project Coordinator (BCIT)<br>
Brownfield Redevelopment Program<br>
http://commons.bcit.ca/brownfield/<br>
<br>
FSA Director<br>
604 432 8857 (o)<br>
778 928 2372 (c)<br>
604 439 0791 (f)<br>
steve_finn@bcit.ca<br>
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------------------------------<br>
<br>
Message: 3<br>
Date: Thu, 4 Dec 2008 14:19:32 -0800<br>
From: "Fisher, Brian" <Brian.Fisher@bchydro.com><br>
Subject: Re: [CANUFNET] FW: CANUFNET Digest, Vol 49,
Issue 3 Re 1.<br>
Re: Urban Tree Species Selection (Fisher, Brian)<br>
To: "Canadian Urban Forest Network" <canufnet@list.web.net><br>
Message-ID:<br>
<64B39DDD27287C4DB8A3448A44A8DF25054DD5F1@EDMBCHMBX2V2.bchydro.adroot.bchydro.bc.ca><br>
<br>
Content-Type: text/plain;
charset="us-ascii"<br>
<br>
A well-written defence, although I'm not sure why.<br>
When I get letters from an official representing an "Invasive Plant<br>
Council" saying that "ANY Non-native planting is<br>
promoting invasives" I see it as dogmatic.<br>
>From my perspective, a bad experience with one imported species<br>
(probably without much supporting research)<br>
shouldn't be a reason to throw out the whole suite of other choices.<br>
I am certainly not opposed to planting native species. I do, however,<br>
think the "natives only" is a bit overdone.<br>
Our nursery sciences have advanced a long way since some of our<br>
pioneering bad experiences.<br>
No we don't want invasives taking over, but diversity also has its<br>
merits, particularly in areas where climate <br>
change is making the environment less hospitable to natives.<br>
We have more information now than we used to. We have strong imports (no<br>
longer really "exotics") which enhance<br>
the liveability of our communities, do not hamper native growth and are<br>
sometimes less susceptible to insects and disease.<br>
Imports or exotics may be appropriate in some areas particularly where<br>
there are significant environmental changes happening.<br>
It is, in my opinion, a bit of an overstatement to suggest that any<br>
planting of a non-native anywhere is an experiment. <br>
In many cases, we have long term background and experience to support<br>
those choices.<br>
Lastly, support for the wise selection of BAM within the urban<br>
landscape, at least from me, does not eliminate the consideration<br>
of appropriate natives. I did not suggest that support for native<br>
species was dogmatic. I did imply that the attacking of any other<br>
choice except a native was dogmatic.<br>
Now if we can just get those Lombardi poplars onto the noxious weed list<br>
.......................................<br>
Brian<br>
<br>
<br>
<br>
<br>
-----Original Message-----<br>
From: canufnet-bounces@list.web.net<br>
[mailto:canufnet-bounces@list.web.net] On Behalf Of Boysen, Barb (MNR)<br>
Sent: 2008, December 04 11:56 AM<br>
To: canufnet@list.web.net<br>
Subject: [CANUFNET] FW: CANUFNET Digest, Vol 49,Issue 3 Re 1. Re: Urban<br>
Tree Species Selection (Fisher, Brian)<br>
<br>
Hello,<br>
<br>
I can't resist replying re the support of native species being called<br>
dogmatic. I hope such arguments, surely well meaning if annoying,
won't<br>
prevent people from looking at the bigger picture. One species'<br>
significant trouble under climate change impacts shouldn't be a reason<br>
to throw out the whole suite of other choices.<br>
<br>
<br>
<br>
<br>
<br>
-----Original Message-----<br>
From: canufnet-bounces@list.web.net<br>
[mailto:canufnet-bounces@list.web.net] On Behalf Of Stephen Cushing<br>
Sent: 2008, December 01 4:44 PM<br>
To: Canadian Urban Forest Network<br>
Subject: [CANUFNET] Urban Tree Species Selection<br>
<br>
Hello everyone, <br>
<br>
I am doing research on urban tree species selection, based on<br>
environmental stresses. I am trying to find examples of municipalities<br>
or organizations that have developed, use selection criteria, or follow<br>
a defined process in selecting urban trees. Other than providing lists<br>
of trees to choose from, most municipal websites and documents do not<br>
outline how urban foresters are selecting the trees they do. <br>
<br>
Any insight would be greatly appreciated. <br>
<br>
Cheers,<br>
Stephen Cushing<br>
MLA Candidate 2009. <br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
------------------------------<br>
<br>
Message: 4<br>
Date: Thu, 4 Dec 2008 14:03:11 -0800<br>
From: "Ian Wilson" <IWilson@kelowna.ca><br>
Subject: Re: [CANUFNET] FW: CANUFNET Digest, Vol 49,
Issue 3 Re 1.<br>
Re: Urban Tree Species Selection (Fisher, Brian)<br>
To: "Canadian Urban Forest Network" <canufnet@list.web.net><br>
Message-ID:<br>
<63C8F69A3250564AAAEE162EF144217F1101A43A@kelexchange.city.kelowna.bc.ca><br>
<br>
Content-Type: text/plain;
charset="us-ascii"<br>
<br>
Regarding the Native vs. exotic species thread:<br>
<br>
In my area, native basically mean Ponderosa pine, Douglas-fir or<br>
cottonwood. Some of the exotics, however, do quite well and have
been<br>
used successfully for a long time, here and elsewhere. Most of our<br>
successful urban tree species are exotics that have been successfully<br>
planted all over the world in the harshest, driest, worst soils and<br>
inhospitable urban spaces.<br>
<br>
Where there is enough space, then by all means let's use the native<br>
species but unfortunately in our urban areas space is a real luxury,<br>
native top soils are completely gone, and trees such as Ponderosa pine<br>
just don't do very well in our downtown; they aren't the greatest<br>
"shade" trees, not to mention planting under power lines or other<br>
difficult spots. For me it all comes back to the "right tree
for the<br>
right space", but there are definitely some advantages to the exotics
in<br>
difficult urban settings.<br>
<br>
Ian Wilson, RPF, Certified Arborist<br>
City of Kelowna<br>
<br>
<br>
-----Original Message-----<br>
From: canufnet-bounces@list.web.net<br>
[mailto:canufnet-bounces@list.web.net] On Behalf Of Boysen, Barb (MNR)<br>
Sent: Thursday, December 04, 2008 11:56 AM<br>
To: canufnet@list.web.net<br>
Subject: [CANUFNET] FW: CANUFNET Digest, Vol 49,Issue 3 Re 1. Re: Urban<br>
Tree Species Selection (Fisher, Brian)<br>
<br>
<br>
Hello,<br>
<br>
I can't resist replying re the support of native species being called<br>
dogmatic. I hope such arguments, surely well meaning if annoying,
won't<br>
prevent people from looking at the bigger picture. One species'<br>
significant trouble under climate change impacts shouldn't be a reason<br>
to throw out the whole suite of other choices.<br>
<br>
One of the reasons we promote native species is that they are proven<br>
performers on the landscape - they are adapted to the local sites,<br>
climates and communities of species. Also in an urban setting promoting<br>
natives helps the urban island contribute to the gene flow between<br>
adjacent natural areas, rather than act as a barrier, or worse<br>
contribute exotic material. That material rarely shows itself to
be a<br>
problem immediately, usually only after it is now difficult and<br>
expensive to eradicate. Problems can include poor growth, short life<br>
span, reduced diversity, and increased insect and disease problems;<br>
never mind the really harmful effects if they invade native communities<br>
with the problems of hybridizing and reducing ecological functions.<br>
<br>
Where the urban sites themselves are highly disturbed and one could<br>
argue no longer 'native' (or even at all suitable for a tree), the<br>
introduction of exotics is still an experiment - what is the origin of<br>
the clones or populations you are introducing; how different is the<br>
source from your site, will it be long lived, healthy? <br>
<br>
Why not experiment with natives on such sites. Or restore the sites?<br>
<br>
Henry Kock of the University of Guelph used to talk about biologically<br>
appropriate material (BAM). The idea is to assess what constitutes<br>
biologically appropriate material for any particular situation. For<br>
example, projects designed to naturalize areas should use seed and/or<br>
propagules of adapted sources of native plants. An example of<br>
inappropriate material would be the establishment of an exotic that<br>
spreads (or hybridizes with native species) next to a natural area.<br>
There may be cases when the use of an exotic is appropriate - when<br>
native material to meet the planting objective is not yet available. An<br>
example might be the planting of exotic cultivars that tolerate the<br>
stressful conditions of an urban environment. <br>
<br>
Here's some of his words: <br>
"BAM - By only growing species that are genetically fit ... i.e. <br>
- adapted to the local environment, <br>
- of sufficient genetic diversity to avoid the pitfalls of
clones,<br>
and <br>
- appropriate to the objectives of the planting project<br>
can we ensure the success of our planting efforts and therefore the<br>
benefits that we expect from a healthy forest - rural or urban. Consider<br>
the consequences for the original planting but also for the subsequent<br>
generations- the very long term impact your selections will have. "<br>
<br>
Use these principles no matter what species you are considering - but<br>
please consider the natives first.<br>
<br>
OR - is the problem really that native species aren't as readily<br>
available yet, in the preferred stock types as the exotic clones and<br>
grafts that tend to be so mass produced?<br>
<br>
In that case we can all dare to be part of the solution rather than keep<br>
supporting the problem.<br>
<br>
Barb Boysen, Coordinator <br>
Forest Gene Conservation Association <br>
Suite 233, 266 Charlotte Street <br>
Peterborough, ON K9J 2V4 <br>
<br>
Tel: (705) 755-3284 <br>
Fax: (705) 755-3292 <br>
Cell: (705) 875-7150 <br>
<br>
barb.boysen@ontario.ca<br>
<br>
www.fgca.net <br>
<br>
www.ontariosnaturalselections.org <br>
<br>
<br>
-----Original Message-----<br>
From: canufnet-bounces@list.web.net<br>
[mailto:canufnet-bounces@list.web.net] On Behalf Of<br>
canufnet-request@list.web.net<br>
Sent: December 4, 2008 12:00 PM<br>
To: canufnet@list.web.net<br>
Subject: CANUFNET Digest, Vol 49, Issue 3<br>
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Today's Topics:<br>
<br>
1. Re: Urban Tree Species Selection (Fisher, Brian)<br>
2. City of Saskatoon Pest Management Supervisor Position<br>
(McLeod, Geoff (IS - Parks))<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Wed, 3 Dec 2008 09:31:25 -0800<br>
From: "Fisher, Brian" <Brian.Fisher@bchydro.com><br>
Subject: Re: [CANUFNET] Urban Tree Species Selection<br>
To: <spcushing@yahoo.ca>, "Canadian Urban Forest
Network"<br>
<canufnet@list.web.net><br>
Message-ID:<br>
<br>
<64B39DDD27287C4DB8A3448A44A8DF250548A097@EDMBCHMBX2V2.bchydro.adroot.bc<br>
hydro.bc.ca><br>
<br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
I have a copy of an old manual - (1993) <br>
Called STREET TREE FACTSHEETS<br>
Library of Congress Catalog Card Number 92.72203<br>
ISBN 1-883956.00.5<br>
Published by Penn State - College of Agricultural Sciences with support<br>
of USDA , Penn Dept.of Env. Res (Bureau of Forestry) Pennsylvania<br>
Electric Energy Research Council and Pennsylvania Nurserymen's<br>
Association.<br>
<br>
It has very good information on more than 200 species & cultivars and<br>
would merit some updating if someone wanted to pursue that.<br>
<br>
I am also finding that at least in our area, there seems to be an<br>
increasing pressure for Native trees from various ad hoc groups. While
I<br>
certainly want to avoid true invasives, I think that the approach is<br>
often dogmatic and offers little that is truly helpful. In a Province<br>
where more than half a billion (Yes that's a B) native pines (95% of the<br>
pines in the province) have been killed by Mountain Pine Beetle, I think<br>
we need to be looking at importing new species, not insisting on<br>
natives. Regards,<br>
Brian <br>
<br>
<br>
<br>
-----Original Message-----<br>
From: canufnet-bounces@list.web.net<br>
[mailto:canufnet-bounces@list.web.net] On Behalf Of Stephen Cushing<br>
Sent: 2008, December 01 4:44 PM<br>
To: Canadian Urban Forest Network<br>
Subject: [CANUFNET] Urban Tree Species Selection<br>
<br>
Hello everyone, <br>
<br>
I am doing research on urban tree species selection, based on<br>
environmental stresses. I am trying to find examples of municipalities<br>
or organizations that have developed, use selection criteria, or follow<br>
a defined process in selecting urban trees. Other than providing lists<br>
of trees to choose from, most municipal websites and documents do not<br>
outline how urban foresters are selecting the trees they do. <br>
<br>
Any insight would be greatly appreciated. <br>
<br>
Cheers,<br>
Stephen Cushing<br>
MLA Candidate 2009. <br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
End of CANUFNET Digest, Vol 49, Issue 4<br>
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