2 questions

Allan Shanfield shanfield at EARTHLINK.NET
Sun Jun 22 11:22:41 CDT 1997

Dear Taxacomers,

I have two questions that may not be purely related to sytematic issues, but
something that sytematicists might have insight on, especially those with an
interest in phytogeography and ecological dynamics.

(1) Has this been done or does it even appear interesting: to compare
paramaters (ie., plant phys., etc.) ecological segregation in microhabitats
of riparian zones in a N. American (mostly Laurasian flora) vs. the same in
a Gondwanan flora (ie., New Zealand)? Could this be a test of "convergence"
or has this idea hackneyed and understood after the IBP's efforts years ago
in testing for "convergence" ie., mediterranean floras in disparate regions?
Backtracking, and in a different vein, is it reasonalble to assume
constituents a Laurasian flora ecologically "behave" as a "Gondwanan"
(slightly older?) flora; or is this an idiotic question.

(2) Are there good discussion "how" and "why" there can be single family
dominance over large tracts of land [at the expense of other families] ie.,
Dipterocarpaceae in SE Asia (accepting there's ecolog. segregregation/niche
differentiation among genera and spp)? Besides eucalypts, are there other
"family" dominated examples? I imagine this is speculative and paleo must be

If anyone knows of any citations re: the above-mentioned questions, I would
be especially grateful to hear from you.

Thanks a lot.

Allan Shanfield

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