[Taxacom] RES: south-west Australia

[John Grehan]

No rain - I was referring to imaginary centers of origin and dispersal
that are used to account for vicariant differentiation.

John Grehan 

-----Original Message-----
From: Robin Leech [mailto:releech at telus.net] 
Sent: Friday, June 24, 2011 4:52 PM
To: John Grehan; taxacom
Subject: Re: [Taxacom] RES: south-west Australia

John,

You make it out such that there are no "Centres of Origin or Dispersal".
Well, sorry to rain on your parade, but here in Canada we have a number
of places that are post-Wisconsinan Centres of Dispersal from areas that
were either absolute refugia, or wandering refugia.
These have been well documented by Hulten and other botanists, and by
Surficial Geologists (Canadian), and by others such as me.

For example, there are species of spiders, insects and plants at the
northern end of Ellesmere Island and Pearyland (northern
Greenland) that are not found far from the refugial dispersal centre.
That is, they are still found ONLY in the Canadian and Greenland High
Arctic.

Robin

----- Original Message -----
From: "John Grehan" <jgrehan at sciencebuff.org>
To: "taxacom" <taxacom at mailman.nhm.ku.edu>
Sent: Friday, June 24, 2011 12:30 PM
Subject: Re: [Taxacom] RES: south-west Australia


>
> -----Original Message-----
> From: taxacom-bounces at mailman.nhm.ku.edu
> [mailto:taxacom-bounces at mailman.nhm.ku.edu] On Behalf Of Curtis Clark
>
>> panbiogeography is on a side track, no doubt due to Croizat's own
>> eccentricities.
>
> Curtis, since you are so big on objectivity and math how about backing
> up that claim with some corresponding evidence.
>
>> I would venture that it will become mainstream only if its current
>> practicioners reinvent it, or more likely when it is rediscovered in
>> the future, much as genetics was.
>
> Yes - when biogeographers free themselves from the slavery to
imaginary
> centers of origin and dispersal.
>
> John Grehan
>
>
>
> --
> --
> Curtis Clark
> Cal Poly Pomona
>
>
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