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Dear friends,<br>
<br>
About the remarks of Ton on the list of invasive higher plants in Belgium
I would like to answer that the short list for Belgium is a deliberate choice.
There excists allready a full list of naturalized phanerogamic species for
Flanders (Verloove 2002). Within few monts a full list of all adventive and
naturalized species for Belgium will be published by the same author (Inplanbel-project).
Every species on both lists is fully commented (frequency, origin, trend,...).
Several thousands of species are incorporated on the list. However, whether
or not to call an alien species also a invasive species is to some degree
a matter of choice. Many really invasive species are not considered harmful
or as a nuissance a so they do not figure on those lists. What I mean is,
that it is not the number of species present on the invasive species lists
that defines the quality of that list. <br>
<br>
Best wishes,<br>
Leo Vanhecke<br>
<br>
Ton van Haaren wrote:<br>
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<div dir="ltr" align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">Dear Etienne</font></span></div>
<div dir="ltr" align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">I have seen the invasive species list
of Belgium and I do think that the list is somewhat short. Although I do
not have any idea how many species and which species really do occur in
Belgium, but there are some errors made in that list. As a member of the
Dutch version of invasive species forum, I'm responsible for the invertebrate
list of the invasive species in The Netherland presented on <a
href="http://www.wew.nu%5Cexoten">www.wew.nu\exoten</a>. While verifying
the Dutch list with the Belgian list there are some differences of which
I mention some below. Also the list of freshwater species of the higher
plants must be longer than this (5 species!). in The Netherland there are
about 30 species recorded.</font></span></div>
<ol dir="ltr">
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">the absence of Corbicula fluminalis
strikes me. It has been introduced in The Netherlands in 1988.</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">Dreissena polymorpha most likely originates
from the Ponto-Caspian area</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial"><font color="#0000ff" size="2">Mytilopsis leucophaeta is a
species that originates from N-America or NW-Africa. The first European
record is from 1835 from the harbour of Antwerpen. The original distribution
area is the Gulf of Mexico and adjacent Atlantic Ocean.</font></font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">Astacus leptodactylus originates form
Eastern Europe</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">Chelicorophium curvispinum, Dikerogammarus
villosus and D. hamobaphes originate from the Ponto-Caspian area.</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">Dikerogammarus haemobaphes in Belgium
seems unlikely, the nearest record in western Europe seems to be some
few records in Germany. Recent claims from this species in the Nertherlands
were all female or specimens with an artefact.</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">Orchestia cavimana originate from
southern Europe</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">the North-American Gammarus tigrinus
is quit common in The Netherlands since 1960. It seems likely that this
species also occurs in Belgium.</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">the absence of both Hemimysis anomala
and Limnomysis benedeni seems peculiar. The last species is extremely
common throughout The Netherlands since it was introduced in 1997.</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">the absence of Atyaephyra desmaresti
(a meditterenean species). This species has been collected in Belgium
for the first time in 1886.</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">the oligochaet Quistadrilus multisetosis
also occurs in Belgium and originates from North-America. This species
had probably been introduced (at least in The Netherland) around 1980.</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">the mosquitoe Aedes albopictus also
occurs in Belgium as an invasive species from North-America or Asia. There
is a record from 2003 from Antwerpen. Although I understand this species
is deliberately omitted from the list, for it's a vector of a human disease.</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">the beetle Stenopelmus rufinasus is
a north-American species that has been introduced in France at the beginning
of the 20th century. Between 1915-1922 the beetle arrived in The Netherlands
and is now extremely common on and between Azolla.</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">the fish Ctenopharyngidon idellus
originates (Dutch specimens) from china</font></span></div>
</li>
<li>
<div align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">Hypophthalmichthys molitrix originates
from Russia or China</font></span></div>
</li>
</ol>
<div dir="ltr" align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">Note that this is just a short list
of Dutch species, and that the origin or introduction year maybe different
in Belgium. You may check our list on <a
href="http://www.wew.nu%5Cexoten">www.wew.nu\exoten</a>.</font></span></div>
<div dir="ltr" align="left"><span class="464205615-10012006"></span> </div>
<div dir="ltr" align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">Best wishes</font></span></div>
<div dir="ltr" align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">Ton van Haaren</font></span></div>
<div dir="ltr" align="left"><span class="464205615-10012006"><font
face="Arial" color="#0000ff" size="2">Grontmij|AquaSense</font></span></div>
<div dir="ltr" align="left"><span class="464205615-10012006"><font
face="Arial" size="2"> </font></span></div>
<div dir="ltr" align="left"><span class="464205615-10012006"> </span></div>
<div dir="ltr" align="left">
<hr tabindex="-1"> </div>
<div dir="ltr" align="left"><font face="Tahoma" size="2"><b>From:</b> BRANQUART
Etienne [<a class="moz-txt-link-freetext" href="mailto:E.Branquart@mrw.wallonie.be">mailto:E.Branquart@mrw.wallonie.be</a>] <br>
<b>Sent:</b> Tuesday, January 10, 2006 4:47 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:invasive-species@biodiversity.be">invasive-species@biodiversity.be</a><br>
<b>Subject:</b> [Invasive-species] New webpages for the Belgian Forum
on Invasive Species<br>
</font><br>
</div>
<div><font face="Arial" size="2">Dear all,</font></div>
<div> </div>
<div><font face="Arial" size="2">New webpages of the Belgian Forum on Invasive
Species have been developed and are accessible from the following URL :</font></div>
<div> </div>
<div><font face="Arial" size="2"><a
href="http://www.biodiversity.be/thematic-forums/invasive-alien-species">http://www.biodiversity.be/thematic-forums/invasive-alien-species</a></font></div>
<div> </div>
<div><font face="Arial" size="2">As you'll see, the list of invasive alien
species in Belgium has been updated, thanks to the contribution of numerous
forum members. I would like to take the opportunity to thank all of you
who contributed to this task by sending information on new invasive species
in Belgium. Species factsheets will be incorporated in the new website in
a few days, including additional species profiles on fishes, parakeets,
etc. A special thank to Dieter Anseeuw, Marie Pairon and Diederik Strubbe
who prepared background information for those new profiles.</font></div>
<div> </div>
<div><font face="Arial" size="2">Of course, new species and information
can be added to this reference list for Belgium. Please feel free to send
new information on the list or directly to my e-mail address.</font></div>
<div> </div>
<div><font face="Arial" size="2">On those pages, new information is also
avaiable on international IAS resources (working groups, research networks,
etc.), thematic news and events, etc. Additional information on legislation
and other IAS-related issues will be also developed in the future. Any comment
or suggestion is very welcome.</font></div>
<div> </div>
<div><font face="Arial" size="2">Very best regards,</font></div>
<div> </div>
<div><font face="Arial" size="2">Etienne Branquart</font></div>
<div> </div>
<div><font face="Arial" size="2">==========================================================================<br>
<br>
Dr. Etienne Branquart<br>
Belgian Biodiversity Platform (SPO)<br>
<br>
Ministere de la Region wallonne<br>
Centre de Recherche de la Nature, des Forets et du Bois (DGRNE)<br>
Avenue Marechal Juin, 23<br>
B-5030 Gembloux- Belgium<br>
<br>
Tel : + 32 (0)81 620 420<br>
Fax : + 32 (0)81 620 436<br>
E-mail : <a href="mailto:E.Branquart@mrw.wallonie.be">E.Branquart@mrw.wallonie.be</a><br>
URL: <a href="http://www.biodiversity.be">http://www.biodiversity.be</a><br>
<br>
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<br>
<pre class="moz-signature" cols="$mailwrapcol">--
Dr. Leo Vanhecke
National Botanic Garden of Belgium (BR)
Dept. of vascular plants
Domein van Bouchout, B-1860 Meise, Belgium
Phone: general: +32 (0)2 269 39 05
direct line: +32 (0)2 260 09 60
Fax: +32 (0)2 270 15 67
e-mail: <a class="moz-txt-link-abbreviated" href="mailto:leo.vanhecke@BR.fgov.be">leo.vanhecke@BR.fgov.be</a></pre>
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