I have to disagree here... unless "grass" is considered one species and
"tree" another prairie and even relatively uniform forest are still a far
cry from monoculture... 

In some areas yes,  that's true,  but prairie grass left alone takes over
everything. Like pines in Ontario,  or Manzinita and scrub brush in south
Texas.   Very little to keep bees going in some areas.  They manage by
storing huge amounts in a very small window.

Even in areas of monoculture there ae crops in the margins,  and usually off
season crops, making that not much different than huge tracts of Kansas
prairies.

Very few areas of monoculture so barren they don't support bees.  Most that
come to mind are wheat in some corn.  Both grown in areas that used to
contain prairie grass and little else.

Charles

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