Another thing to consider is the change in habitat- invasive plants or
deliberate addition of new plants. In essence a change in food sources.
There are just too many variables for a definitive statement, either for
increase or decrease as to cause.
I note that wind turbines were not mentioned while insects do use the wind
to move from place to place.
Bill Truesdell
Bath, Maine
***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software. For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html