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On Tue, 2 Apr 1996, Jeffrey Martz wrote:
> >[In response to the hypothesis that geese originally developed their
> >long necks for feeding at the bottoms of ponds]
> Is there any fossil evidence to back this up? Do any long necked
> waterfowl today feed off the bottoms of ponds?
Correct me if I'm wrong, but isn't this exactly what swans do?
> > What kind of ground cover was around in the Mesozoic? Most dinosaur
> > drawings I've seen show a lot of bare earth. Seems unlikely to me.
> As far as I know, there is no known Mesozoic equivalent for
> grasses. Undergrowth yeah, but no uniform ground cover like grasses are
> today. Would this have prevented problems for other plants via heavy
> erosion? Probably a dumb question.
Not a dumb question at all, and part of the reason for my original
question. It does seem like a lack of ground cover would leave the
topsoil vulnerable to erosion, particularly if there were periods of
heavy rain like in today's trpics. It would also be a major unexploited
niche for the plants.
> LN Jeff
Pacific Lutheran University
Tacoma, WA 98447