[Syrphidae] Re: FW: Syrphidae alert

[Leendert-Jan van der Ent]

Hi all,

Similar in The Netherlands.
Low number of specimens of most species and low numbers regarding species in forest areas on sandy soils.
We have had the thirth dry and warm spring in a row and probably also will get a dry and hot summer again.
This is going to be devestating to populations of quite some forest. and also natural dry grassland an Heather, species.
The number of species that I usually see around the place where I do live every year but the past few years not anymore is growing.
If this continuous we will get mediteranean climate conditions in The Netherlands .
Good for some interesting Pipizella and Paragus species, maybe also Merodon, but bad for the North European and Central European hilly area and mountain species.

Maybe an idea that those of us who have similar findings tries to quantify this downgrade of species and specimens numbers and put these information together to find out which species are influenced the most. I will do this at the end of the season.
Right now we are busy with the Red Listing of Eurpean hoverfly species.
Climate change - influenced by humans or not - might become a bigger threat to hoverfly species than habitat destruction has been in the past. And this effects most species of hoverflies and not only those who are living in threathened habitat types.

Let's hope that in other parts of Europe hoverflies are doing better!


Regards,

Leendert-Jan van der Ent








> Op 10 juni 2020 om 6:57 schreef Francis Gilbert <Francis.Gilbert at nottingham.ac.uk>:
> 
> 
>      
> 
>      
> 
>     From: stiller3 [mailto:stiller3 at xs4all.nl]
>     Sent: 09 June 2020 20:56
>     To: Ante Vujić <ante.vujic at dbe.uns.ac.rs>
>     Cc: Hoverfly discussion list <Syrphidae at lists.nottingham.ac.uk>
>     Subject: Re: [Syrphidae] Syrphidae alert
> 
> 
>     Hi Ante,
> 
>     I kind of experience the same here where I have spent almost 2 months now, in the SW of France. 
>     Low numbers of most taxa, also of many Syrphini, except some. 
>     Sphaerophoria scripta in very large numbers last week. 
>     But, compared to last year 2019, my impression is that this year is much poorer, despite the mild winter they had here. 
> 
>     But 'a hunch' is no proof. 
> 
>     cheers, André
> 
>      
> 
>      
> 
>     Ante Vujić schreef op 09-06-2020 09:59:
> 
>         > > 
> >         Dear all,
> > 
> >         I would like to share with you field experience from this season in Serbia. We have less than 50% of species usual for this time of year in flight and most of present species are with very small populations. Aphidofagous species are most numerous, especially Syrphus. Very low number of Cheilosia and Merodon. This can be related to long period without rain during spring, but still. During my 40 years experience in field work, this is the strangest season.
> > 
> >         Best regards,
> > 
> >         Ante
> > 
> > 
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Met vriendelijke groet,
Leendert-Jan van der Ent

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