[Taxacom] Hypothesis: How Nothofagus rafted to New Zealand
kinman at hotmail.com
Sun Dec 24 11:29:10 CST 2006
Granted, that first sentence is not a testable hypothesis, but it is
the beginnings of one. Dispersal of some kind is indeed a testable
hypothesis, and I'm glad to see Fred Schueler understands what I am trying
to do. Note that the Cyttaria evidence has already shifted my attention
from birds to ocean rafting as the more likely mechanism, so I am testing
and modifying the hypothesis as I go along.
Anyway, onto mosses and insects to seek even more evidence that
dispersal is more likely than vicariance in this case. And by the way, it
looks like Cyttaria gunnii might have speciated in New Zealand (if Cyttaria
pallida is it's closest relative). Unfortunately NCBI only shows one
sequence for the entire genus, so I guess we have to rely on morphology for
now (Cyttaria would be a great project for a molecular mycologist!!!). But
it is Christmas eve, so Nothofagus and Cyttaria have to go on my back burner
for a few days.
Curtis Clark wrote:
>On 2006-12-23 20:03, Ken Kinman wrote:
> > My hypothesis is that one (or more) Nothofagus cunninghamii trees
> > rafted to New Zealand carrying on their branchs both their own fruit and
> > their unique fungus Cyttaria gunni. The tree or trees could have been
> > dislodged due to land slides, massive floods, or even a tsunami---pick
> > your favorite disaster.
>This is not a hypothesis, since it's not testable. It's evolutionary
>"tall tales" such as this that give the panbiogeographers ammunition.
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