>
>
> I agree with you the rest of your post, except to say that not all
> mosquitoes are human-feeders, and not all are WNV-vectors (only those
> that bite both birds and mammals are).


>
> > Fewer bees probably does equate with fewer flowering plants.


 In the same spirit, I should add that many flowering plants are long-lived
perennials, many use pollinators other than bees (possibly in addition to
bees), and many are capable of pollinating themselves or producing seeds
asexually (and, if you want to call clonal growth "reproduction," a whole
lot of them do that, too).  So their abundances cannot be expected to
track bee abundances very closely.  On the other hand, if flowering plant
abundance IS strongly correlated with bee abundance across space or time in
your study system, it could be the bee populations that are tracking the
plant populations.

This is what makes ecology so challenging!

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