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I am not surprised by the numbers of species found together - the
ecological separation may be both the prey item and also the
micro-climate. It is worth bearing in mind that despite the ideas of
phytosociology linking invertebrates to a defined plant assemblage
is problematic. My feeling is that within the UK fauna there is an
assemblage that is essentaily associated with acidic (and
ericaceous) conditions in which the habitat has both wet and dry
zones and is fringed by acid grassland with large numbers of yellow
composites.<br>
<br>
I have found as many as five species (S. batava, S. philantha, S.
virgata, S. fatarum and S. scripta) on the same heathland sites in
SE England but of those two are abundant in the north and west (S.
philantha and S. fatarum), whilst one is highly localised (S.
virgata) and one is primarily northern (S. fatarum). What I do
wonder about is the future status of these species in SE England
with increasing climate impacts.<br>
<br>
Regards<br>
<br>
Roger<br>
<br>
<div class="moz-cite-prefix">On 14/09/2020 09:13, ximo mengual
sanchis wrote:<br>
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<div><font size="2">Many thanks Roger!</font></div>
<div><br>
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<div><font size="2">Very interesting information. Somehow, each
species has different ecological requirements, but one can
collect 2 or 3 species in the same locality.</font></div>
<div><font size="2"><br>
</font></div>
<div><font size="2">Regards,</font></div>
<div><font size="2"><br>
</font></div>
<div><font size="2">Ximo</font><br>
</div>
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<div dir="ltr" class="gmail_attr">El dom., 13 sept. 2020 a las
20:13, Roger Morris (<<a href="mailto:syrphid58@gmail.com"
moz-do-not-send="true">syrphid58@gmail.com</a>>)
escribió:<br>
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<div> In the UK there is quite strong regional
differentiation, with S. philantha and fatarum being
strongly northern and western but also found in heathlands
in southern England. S. potentillae is confined to Culm
grassland in the SW. S. taeniata and S. batava are
differentiated on habitat with S. taeniata more closely
associated with grasslands and S. batava with ericaceous
scrub. There are few records of S. virgata but this too
seems to be a heathland species. There remains a question
mark for S. interrupta but my feeling is that it is more a
northern and western species. No idea for S. bankowski!<br>
<br>
Regards<br>
<br>
Roger<br>
<br>
<div>On 13/09/2020 18:20, Menno Reemer wrote:<br>
</div>
<blockquote type="cite">
<div
style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
In the Netherlands, every Sphaerophoria species has its
own habitat requirements, but some can be found in the
same areas. For details, you could consult the species
accounts in the book <i>De Nederlandse zweefvliegen</i>:</div>
<div
style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<a
href="https://www.bestuivers.nl/publicaties/de-nederlandse-zweefvliegen"
id="gmail-m_-4202525432556369148LPlnk" target="_blank"
moz-do-not-send="true">https://www.bestuivers.nl/publicaties/de-nederlandse-zweefvliegen</a><br>
</div>
<div
style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
See chapter 10 pp. 311-318 for Sphaerophoria. These
species accounts are based on the collective field
experiences of many Dutch syrphidologists.<u> They all
have English summaries!</u></div>
<div
style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Also see appendix 6, which arranges all the species
according to the habitats in which they occur. </div>
<div
style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Best wishes,</div>
<div
style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Menno</div>
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style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
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style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
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<div id="gmail-m_-4202525432556369148divRplyFwdMsg"
dir="ltr"><font style="font-size:11pt" face="Calibri,
sans-serif" color="#000000"><b>From:</b> <a
href="mailto:syrphidae-bounces@lists.nottingham.ac.uk"
target="_blank" moz-do-not-send="true">syrphidae-bounces@lists.nottingham.ac.uk</a>
<a
href="mailto:syrphidae-bounces@lists.nottingham.ac.uk"
target="_blank" moz-do-not-send="true"><syrphidae-bounces@lists.nottingham.ac.uk></a>
on behalf of Robert Żóralski <a
href="mailto:robert@insects.pl" target="_blank"
moz-do-not-send="true"><robert@insects.pl></a><br>
<b>Sent:</b> Sunday, September 13, 2020 4:21 PM<br>
<b>To:</b> ximo mengual sanchis <a
href="mailto:xmengual@gmail.com" target="_blank"
moz-do-not-send="true"><xmengual@gmail.com></a><br>
<b>Cc:</b> Hoverfly discussion list <a
href="mailto:syrphidae@lists.nottingham.ac.uk"
target="_blank" moz-do-not-send="true"><syrphidae@lists.nottingham.ac.uk></a><br>
<b>Subject:</b> [Syrphidae] Re: Sympatry in
Sphaerophoria</font>
<div> </div>
</div>
<div>
<div dir="auto">In Poland S. virgata is forest
species, and rare. S. scripta is present on all
possible types of meadows incl. ruderal areas, being
sympatric with S. taeniata and S. batava on e.g.
forest glades and "good open areas", especially on
coasts an along rivers - many times I gathered
longer series of all three. S.philantha is extremely
rare. S.interrupta is very rare.</div>
<br>
<div>
<div dir="ltr">niedz., 13 wrz 2020, 08:12 użytkownik
ximo mengual sanchis <<a
href="mailto:xmengual@gmail.com" target="_blank"
moz-do-not-send="true">xmengual@gmail.com</a>>
napisał:<br>
</div>
<blockquote style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div dir="auto">Dear all,
<div dir="auto"><br>
</div>
<div dir="auto">I have a question regarding
Sphaerophoria. Based on my field experience, I
would say that usually more than one
Sphaerophoria species occur in the same
locality. </div>
<div dir="auto"><br>
</div>
<div dir="auto">I am interested on S. taeniata,
virgata, scripta, interrupta and philantha.
Can someone tell me if they are sympatric?</div>
<div dir="auto"><br>
</div>
<div dir="auto">I collected in the same place
scripta and taeniata, for example. Is it the
same for philantha and virgata? or taeniata
and interrupta?</div>
<div dir="auto"><br>
</div>
<div dir="auto">Cheers,</div>
<div dir="auto"><br>
</div>
<div dir="auto">Ximo</div>
</div>
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