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<DIV><FONT face=Arial size=4>All:</FONT></DIV>
<DIV><FONT face=Arial size=4></FONT> </DIV>
<DIV><FONT face=Arial size=4>When looking at the "behavior" of colonizing
species, both time and place (context) is often overlooked. Many variables may
be involved. </FONT></DIV>
<DIV><FONT face=Arial size=4></FONT> </DIV>
<DIV><FONT face=Arial size=4>Riparian zones are, by their nature, "disturbed."
Boulder bulldozers are still bulldozers as far as ecosystems are concerned and
every site is subject to at least some "perturbation." Persistence is one
measure of an organism's long-term viability in an ecological context. Organisms
move around opportunistically, and if there are propagules and some perturbation
shifts an environment/habitat in favor of an organism, it will do its
thing--when it can, where it can. If it can't, it won't. </FONT></DIV>
<DIV><FONT face=Arial size=4></FONT> </DIV>
<DIV><FONT face=Arial size=4>Ecologists should be more patient. While anecdote
is the singular of data, even mountainous piles of data cannot always reveal
much about long-cycle ecosystem dynamics. Similarly, extremely short-cycled
dynamics like riparian zones can be one way one day; another way another day;
this can produce quite a dilemma when trying to make sense of mere numbers.
There may be no algorithm for this. </FONT></DIV>
<DIV><FONT face=Arial size=4></FONT> </DIV>
<DIV><FONT face=Arial size=4>WT</FONT></DIV>
<DIV><FONT face=Arial size=4></FONT> </DIV>
<DIV> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=jrandall@email.unc.edu href="mailto:jrandall@email.unc.edu">Randall,
John L</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=wvanderploeg@ameritech.net
href="mailto:wvanderploeg@ameritech.net">Wayne Vanderploeg</A> ; <A
title=Dominic.Maze@portlandoregon.gov
href="mailto:Dominic.Maze@portlandoregon.gov">Maze, Dominic</A> ; <A
title=katie@westernwatersheds.org
href="mailto:katie@westernwatersheds.org">Katie Fite</A> ; <A
title=apwg@lists.plantconservation.org
href="mailto:apwg@lists.plantconservation.org">apwg@lists.plantconservation.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, July 19, 2011 11:05
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [APWG] Jewelweed</DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 'Calibri','sans-serif'">I
agree with Wayne on the Impatiens info. I studied the ecology of both I.
capensis and I. pallida for many years and, like Wayne, have watched
populations come and go. These are very “sensitive,” fragile, annuals whose
seeds do not have any dormancy, which makes me very surprised that they are
behaving as an “invasive.” But my experience with these taxa is in the
southeast, so I cannot really speak to their (mis)behavior outside of this
range. Johnny Randall <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<DIV>
<DIV
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; BORDER-LEFT: medium none; PADDING-TOP: 3pt; BORDER-BOTTOM: medium none">
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'"> <A
href="mailto:apwg-bounces@lists.plantconservation.org">apwg-bounces@lists.plantconservation.org</A>
[mailto:apwg-bounces@lists.plantconservation.org] <B>On Behalf Of </B>Wayne
Vanderploeg<BR><B>Sent:</B> Tuesday, July 19, 2011 1:25 PM<BR><B>To:</B> Maze,
Dominic; Katie Fite; apwg@lists.plantconservation.org<BR><B>Subject:</B> Re:
[APWG] Jewelweed<o:p></o:p></SPAN></P></DIV></DIV>
<P class=MsoNormal><o:p> </o:p></P>
<DIV>
<DIV>
<P class=MsoNormal>Hello All, <BR><BR>I don't usually make comment to this
group....I generally browse this list to see what new issues are popping
up. As a biologist/ecologist/naturalist/land manager for 31 years in the
Chicago area with the Forest Preserve District of Cook County, I have seen
this plant come and go. Deer do browse it heavily and tend to prefer it
over most other plants. It does well in disturbed areas where the soil
is rich, moist and semi shaded. I have always viewed it as sensitive
plant that is easily displaced by weeds and never thought of it as a problem
plant in the Chicago area. The fact that it is spreading prolifically in
other areas where it typically does not occur could be a symptom of a bigger
problem. I would expect it to disappear when those problems are
discovered and solved. <BR><BR>Wayne Vanderploeg<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">
<HR align=center width="100%" SIZE=1>
</SPAN></DIV>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'"> "Maze, Dominic"
<Dominic.Maze@portlandoregon.gov><BR><B>To:</B> Katie Fite
<katie@westernwatersheds.org>; "apwg@lists.plantconservation.org"
<apwg@lists.plantconservation.org><BR><B>Sent:</B> Tue, July 19, 2011
11:42:18 AM<BR><B>Subject:</B> Re: [APWG] Jewelweed</SPAN><o:p></o:p></P>
<DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'">Hi
Katie et alia,</SPAN><o:p></o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'">
<I>Impatiens capensis</I> is, in my experience, a problematic species here
west of the Cascade Range in the Pacific NW. The densities of this sp.
are pretty amazing with the understory of riparian corridors often dominated
by it. I’ve been seeing more and more of it in the Willamette Valley and
surrounding ranges here in Oregon with seemingly little attention paid to
it.</SPAN><o:p></o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'">
Interestingly, some land managers still consider this species native here on
the West Coast, probably due to confusion with our native, <I>I.
ecalcarata</I> in some older floras and field guides. Ed Alverson of TNC
wrote a short comment in reply to a posting on <I>I. capensis</I> at the
Botany Photo of the Day website:</SPAN><o:p></o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'"> </SPAN><o:p></o:p></P>
<P class=MsoNormal><SPAN class=apple-style-span><SPAN
style="COLOR: #333333; FONT-FAMILY: 'Arial Narrow','sans-serif'">“Impatiens
capensis is an introduced and invasive species in the Pacific Northwest , west
of the Cascades. Peter Zika addressed this issue in a 2006 paper, "The status
of Impatiens capensis (Balsaminaceae) on the</SPAN></SPAN><SPAN
style="COLOR: #333333; FONT-FAMILY: 'Arial Narrow','sans-serif'"><BR><SPAN
class=apple-style-span>Pacific Northwest coast", published in the Journal of
the Torrey Botanical Club, vol. 133 pp. 593-600. In fact, I. capensis is
spreading into the habitats of the uncommon native I. ecalcarata west of the
Cascades, and the two species are hybridizing. This has created a situation
where the native species is potentially being out-competed by both the
introduced species and by their hybrids. Zika has published another paper on
the hybrid, which he has named Impatiens x pacifica , see "Impatiens x
pacifica (Balsaminaceae), a New Hybrid jewelweed from the Pacific Northwest
Coast of North America", Novon vol. 16, pp. 443-448,
2006.</SPAN>”</SPAN><o:p></o:p></P>
<P class=MsoNormal><SPAN class=apple-style-span> </SPAN><o:p></o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'">Add
this spp. to <I>I. glandulifera</I> (a big problem) and <I>I. balfourii</I>
(an escaping species which may be a problem in the future), and we’ve got our
hands full out here with the touch-me-nots.</SPAN><o:p></o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'"> </SPAN><o:p></o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Arial','sans-serif'"> </SPAN><o:p></o:p></P>
<DIV>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><B><SPAN
style="FONT-SIZE: 10pt; COLOR: green; FONT-FAMILY: 'Calibri','sans-serif'">Dominic
Maze</SPAN></B><SPAN
style="FONT-SIZE: 10pt; COLOR: green; FONT-FAMILY: 'Calibri','sans-serif'"> |
</SPAN><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Calibri','sans-serif'">Invasive
Species Coordinator </SPAN><o:p></o:p></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Calibri','sans-serif'">City
of Portland Environmental Services</SPAN><o:p></o:p></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Calibri','sans-serif'">1120
SW 5th Avenue, Room 1000</SPAN><o:p></o:p></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Calibri','sans-serif'">Portland,
Oregon 97204</SPAN><o:p></o:p></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Calibri','sans-serif'">p:
(503) 823-4899</SPAN><o:p></o:p></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Calibri','sans-serif'">f:
(503) 823-5344</SPAN><o:p></o:p></P>
<P class=MsoNormal style="MARGIN-LEFT: 0.5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Calibri','sans-serif'"><A
href="mailto:dominic.maze@portlandoregon.gov"
target=_blank>dominic.maze@portlandoregon.gov</A></SPAN><o:p></o:p></P></DIV>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center>
<HR align=center width="100%" SIZE=2>
</DIV>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">
apwg-bounces@lists.plantconservation.org
[mailto:apwg-bounces@lists.plantconservation.org] <B>On Behalf Of </B>Katie
Fite<BR><B>Sent:</B> Monday, July 18, 2011 5:46 PM<BR><B>To:</B>
apwg@lists.plantconservation.org<BR><B>Subject:</B> [APWG]
Jewelweed</SPAN><o:p></o:p></P></DIV>
<P class=MsoNormal> <o:p></o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: 'Calibri','sans-serif'"><BR>Has anyone
had any experience with jewelweed (Impatiens) native to the eastern U. S.
becoming weedy in valley marsh habitats in the intermountain West? <BR><BR>I
see that jewelweed <I>Impatiens capensis</I> (orange jewelweed) is listed as a
King County (WA) “Weed of Concern”. <BR><BR>This species is shown as
having a yellow flowered form, which is what we are seeing.<BR><BR><A
href="http://www.kingcounty.gov/environment/animalsAndPlants/noxious-weeds/laws/list.aspx"
target=_blank>http://www.kingcounty.gov/environment/animalsAndPlants/noxious-weeds/laws/list.aspx</A><BR><BR>Katie
Fite<BR>Western Watersheds
Project<BR>katie@westernwatersheds.org<BR><BR> </SPAN>
<o:p></o:p></P></DIV></DIV></DIV></DIV></DIV>
<P>
<HR>
<P></P><BR>_______________________________________________<BR>PCA's Alien
Plant Working Group mailing
list<BR>APWG@lists.plantconservation.org<BR>http://lists.plantconservation.org/mailman/listinfo/apwg_lists.plantconservation.org<BR><BR>Disclaimer<BR>Any
requests, advice or opinions posted to this list reflect ONLY the opinion of
the individual posting the message.
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