Re[2]: [NatureNS] Multiflora Rose

Date: Wed, 6 Dec 2017 13:28:14 -0400 (AST)
From: "rita.paul@ns.sympatico.ca" <rita.paul@ns.sympatico.ca>
To: naturens@chebucto.ns.ca
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Index of Subjects

e in NS (or in a new wave of invasiveness)=C2=A0 sometime after 2000.
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   &#160;
   <span style=3D"font-size: medium;">Most store roses are grafted unto a r=
ootstock David.</span>
  </div>=20
  <div>
   <span style=3D"font-size: medium;">The rootstock will be undefined in mo=
st cases but we know<br/></span>
  </div>=20
  <div>
   <span style=3D"font-size: medium;">Multiflora roses are popular for good=
 reasons! The grafted<br/></span>
  </div>=20
  <div>
   <span style=3D"font-size: medium;">part - top - will usually be inferior=
 in hardiness and other aspects to<br/></span>
  </div>=20
  <div>
   <span style=3D"font-size: medium;">the rootstock so the top dies - the r=
oots send up shoots and then<br/></span>
  </div>=20
  <div>
   <span style=3D"font-size: medium;">you have a Multiflora rose ready to g=
o!<br/></span>
  </div>=20
  <div>
   <span style=3D"font-size: medium;">You can obtain roses on their own roo=
ts - hardy roses that is&#160; - but<br/></span>
  </div>=20
  <div>
   <span style=3D"font-size: medium;">not at the local store!<br/></span>
  </div>=20
  <div>
   <span style=3D"font-size: medium;">Enjoy the rain - it will help the ros=
es.<br/></span>
  </div>=20
  <div>
   <span style=3D"font-size: medium;">Paul<br/></span>
  </div>=20
  <div>
   <span style=3D"font-size: medium;">&#160;</span>
  </div>=20
  <blockquote style=3D"padding-left: 10px; margin-left: 0px; border-left-co=
lor: blue; border-left-width: 1px; border-left-style: solid; position: rela=
tive;" type=3D"cite">
   On December 6, 2017 at 10:41 AM David Patriquin &#60;davidgpatriquin@gma=
il.com&#62; wrote:
   <br/>
   <br/>=20
   <div dir=3D"ltr">
    Another &#34;David&#34; here. An interesting, worthwhile debate. A few =
thoughts.=20
    <div>
     &#160;
    </div>=20
    <div>
     Multiflora rose, while it had been here 100 years and more, seems to h=
ave taken off recently as an invasive in NS (or in a new wave of invasivene=
ss)&#160; sometime after 2000. Did that stem from threshold changes in dist=
urbance or vehicles of movement, or did a particular line have traits that =
make it especially invasive (or some combination of the two); it seems a ge=
netic study could sort that out. Are there less invasive strains that could=
 be used as ornamentals/to attract and feed birds?
    </div>=20
    <div>
     &#160;
    </div>=20
    <div>
     I have conducted some documentation of the spread of R. multiflora in =
the Halifax area, Point Pleasant Park in particular. See=20
     <a href=3D"http://versicolor.ca/multiflorarose">versicolor.ca/multiflo=
rarose</a>&#160;&#160;
    </div>=20
    <div>
     &#160;
    </div>=20
    <div>
     We might&#160; keep in mind that about 1/3 of our flora is of exotic o=
rigin at least in recent centuries, and mostl of these species are plants o=
f disturbed habitats, perhaps all (except (glossy buckthorn?) are not shade=
 tolerant; their introduction since European colonizations reflects&#160; t=
he greater abundance of ruderal species in Europe &#38; Asia because of a l=
onger history of extensive human disturbance than in NA. On the whole these=
 immigrants&#160; perform important ecological functions and do not serious=
ly threaten native plant communities. (Surely the loss of weedy species und=
er our now super efficient glyphosate weed control is a big factor in decli=
ne of many species). Perhaps where they do threaten native plant communitie=
s in NS that is a transient process as it likely was for many of the exotic=
 species for a period after they first arrived.&#160;
    </div>=20
    <div>
     &#160;
    </div>=20
    <div>
     NS is likely species depauperate because of the short time since the g=
laciers retreated and our relative isolation as a peninsula on the Atlantic=
 coast, so in a sense we are &#34;open for business&#34; when it comes to i=
mmigration of new plant species. I think we should be very actively conduct=
ing Assisted Migration, particularly for forest species, to increase specie=
s diversity and resilience in the face of climate change.&#160; Anyway, a f=
ew thoughts for the mix.&#160;
    </div>=20
    <div>
     &#160;
    </div>=20
    <div>
     PS: I have spent some time cutting back multiflora rose&#160; near The=
 Bluff Trail trailhead, as it is still not abundant along the rails to trai=
l BLT, and so far there are no exotics once you get 5 m into the trail, so =
it takes little effort at this point to keep it out. I do not have R multif=
lora in my back yard but if I could obtain a non-invasive type, I would wel=
come it both as an ornamental and as bird food.&#160; I do not keep bird fe=
eders because they&#160; encourage everything I don&#39;t want, rats, squir=
rels and pigeons amongst them.
    </div>=20
    <div class=3D"gmail_extra">
     <br/>=20
     <div class=3D"gmail_quote">
      On Wed, Dec 6, 2017 at 8:49 AM, Randy Lauff=20
      <span>&#60;<a target=3D"_blank" href=3D"mailto:randy.lauff@gmail.com"=
>randy.lauff@gmail.com</a>&#62;</span> wrote:
      <br/>=20
      <blockquote style=3D"margin: 0px 0px 0