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Ken McKenna
Box 218 Stellarton NS
B0K 1S0
902 752-7644
Hi Jane
Roland and Smith "The Flora of Nova Scotia" (1969) has a range map that shows Poison Ivy (R. radicans) as being widespread in NS
but for some reason not in the central mainland. In Pictou Co. there is now and may have been then as well-but not surveyed, a large
amount in the dunes and salt marsh on Big I. I have not seen a lot in many other places in the county.
cheers
Ken
----- Original Message -----
From: Christopher Majka
To: naturens@chebucto.ns.ca
Sent: Monday, November 01, 2010 5:30 PM
Subject: Re: [NatureNS]Invasive aliens: was re unauthorized vs. OK plants lists
Hi Jane,
On 1-Nov-10, at 5:05 PM, David&Jane Schlosberg wrote:
Here's a question for you experts: is poison ivy considered to be an invader?
When we first moved to Nova Scotia (Pictou county), in 1971, I don't remember seeing it at all. Now, of course, it's everywhere. It certainly would fall into the "noxious" category.
The term "invader" isn't a very useful or precise one. These days biologists often employ the term "adventive" meaning a species that "came from somewhere else." This is intended to encompass both species that were deliberately and accidentally (inadvertently) introduced. Adventive species can be invasive or not (most, of course, are not) according to factors such as their own biological potential, their habitat requirements, their climatic tolerance, whether they have predators and parasites (animals) that prey or parasitize them, or in the case of plants, feed on their foliage, roots, seeds, flowers, etc.
The counterpoint to adventive species are native species. Poison ivy (Toxicodendron radicans) and western poison ivy (Toxicodendron rydbergii) are both native species. Has their range expanded in Nova Scotia? I'm not sure; I don't think so. The 1996 Canadian Weed Control Act does categorize them as "noxious weeds."
Cheers!
Chris
Christopher Majka <c.majka@ns.sympatico.ca> | Halifax, Nova Scotia, Canada
* Research Associate: Nova Scotia Museum | http://museum.gov.ns.ca/mnh/research-asfr.htm
* Review Editor: The Coleopterists Bulletin | http://www.coleopsoc.org/
* Subject Editor: ZooKeys | http://pensoftonline.net/zookeys/index.php/journal/index
* Associate Editor: Journal of the Acadian Entomological Society | http://www.acadianes.org/journal.html
* Editor: Atlantic Canada Coleoptera | http://www.chebucto.ns.ca/Environment/NHR/atlantic_coleoptera.html
"Whenever I hear of the capture of rare beetles, I feel like an old war-horse at the sound of a trumpet." - Charles Darwin
--Boundary_(ID_rety0vweNTKB+o1n6Eqgwg)
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<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV>Ken McKenna<BR>Box 218 Stellarton NS<BR>B0K 1S0<BR>902 752-7644</DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial>Hi Jane </FONT></DIV>
<DIV><FONT size=2 face=Arial>Roland and Smith "The Flora of Nova Scotia" (1969)
has a range map that shows Poison Ivy (R. radicans) as being widespread in
NS</FONT><FONT size=2 face=Arial> </FONT></DIV>
<DIV><FONT size=2 face=Arial>but for some reason not in the central mainland. In
Pictou Co. there is now and may have been then as well-but not surveyed, a
large </FONT></DIV>
<DIV><FONT size=2 face=Arial>amount in the dunes and salt marsh on Big I. I have
not seen a lot in many other places in the county.</FONT></DIV>
<DIV><FONT size=2 face=Arial>cheers</FONT></DIV>
<DIV><FONT size=2 face=Arial>Ken</FONT><BR>----- Original Message ----- </DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=c.majka@ns.sympatico.ca
href="mailto:c.majka@ns.sympatico.ca">Christopher Majka</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=naturens@chebucto.ns.ca
href="mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, November 01, 2010 5:30
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NatureNS]Invasive aliens:
was re unauthorized vs. OK plants lists</DIV>
<DIV><BR></DIV>Hi Jane,
<DIV><BR>
<DIV>
<DIV>On 1-Nov-10, at 5:05 PM, David&Jane Schlosberg wrote:</DIV><BR
class=Apple-interchange-newline>
<BLOCKQUOTE type="cite"><SPAN
style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 0px; BORDER-COLLAPSE: separate; FONT: medium 'Times New Roman'; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"
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<DIV style="FONT-FAMILY: Tahoma; FONT-SIZE: 10pt" class=hmmessage>
<DIV><SPAN class=734380220-01112010><FONT color=#0000ff face=Arial>Here's a
question for you experts: is poison ivy considered to be an
invader?</FONT></SPAN></DIV>
<DIV><SPAN class=734380220-01112010><FONT color=#0000ff face=Arial>When we
first moved to Nova Scotia (Pictou county), in 1971, I don't remember seeing
it at all. Now, of course, it's everywhere. It certainly
would fall into the "noxious"
category.</FONT></SPAN></DIV></DIV></SPAN></BLOCKQUOTE><BR></DIV>
<DIV>The term "invader" isn't a very useful or precise one. These days
biologists often employ the term "adventive" meaning a species that "came from
somewhere else." This is intended to encompass both species that were
deliberately and accidentally (inadvertently) introduced. Adventive species
can be invasive or not (most, of course, are