[Taxacom] Tectonic uplift as a mjor evolutionary process

John Grehan calabar.john at gmail.com
Fri Mar 22 20:10:04 CDT 2019


I see it as metaphysical because you invoke a story of imagined events
rather than based on anything remotely empirical. Correlations with uplift
tectonics is empirically based by comparison. If it works now it worked
then. But I agree that this is a prediction, not a proof so anyone is free
to disagree for whatever reason, just as one is free to imagine invasion of
alpine habits from the lowlands due to vacant niches or whatever. I think
it quite possible that arthropods were lifted out along with plants they
were feeding on.

John Grehan

On Fri, Mar 22, 2019 at 8:37 PM Kenneth Kinman <kinman at hotmail.com> wrote:

> John,
>         What is metaphysical about it???  Millipedes love mosses.  It is
> not only used for food, but shelter as well.  And since early bryophytes
> evolved from green algae, millipede ancestors likely consumed and sought
> shelter in green algal mats.  Therefore, it is not surprising that
> millipedes were among the first animals to invade land.
>         So I see this as a slow, but active, invasion (not due to being
> passively thrust up out of the water and managing to adapt).  Passive
> uplift certainly seems to have effects on plant and animal life later on
> (during mountain building), but I see no reason to think it had much (if
> any) to do with the invasion (active, not passive) of land by animals and
> plants.
>                         -----------------Ken
> ________________________________
> From: John Grehan <calabar.john at gmail.com>
> Sent: Friday, March 22, 2019 5:57 PM
> To: Kenneth Kinman
> Cc: taxacom
> Subject: Re: [Taxacom] Tectonic uplift as a mjor evolutionary process
>
> "The first invasions by millipedes and centipedes would have probably been
> due to active pursuit of bryophytes as a food source (followed by scorpions
> hunting them)." - this is a nice example of the selection metaphysics I was
> referring to (never mind that the milli and centis must have had enough
> food in the first place and how they figured out that there was more up
> 'above' beats me - smart bugs I guess). There is no 'probably' about it at
> all. The passive uplift model is as about empirically based as evolution
> can get, and if one argues for uniformitarianism then what works now also
> worked then. There are examples of inland freshwater taxa with marine
> relatives that can be correlated with tectonic uplift.
>
> John Grehan
>
> On Fri, Mar 22, 2019 at 6:45 PM Kenneth Kinman <kinman at hotmail.com<mailto:
> kinman at hotmail.com>> wrote:
> Dear all,
>      John Grehan wrote:  "The original establishment of terrestrial life
> was not from some metaphysical selective advantage... but the outcome of
> marine coastal life being constantly thrust
> out of the water. Sooner or later some were going to survive and the rest
> is history."
>      I suppose one could argue that this might have been a factor in early
> bryophytes invading land.  However, I'm not so sure being "constantly
> thrust out of the water" had much to do with animals invading land.  The
> first invasions by millipedes and centipedes would have probably been due
> to active pursuit of bryophytes as a food source (followed by scorpions
> hunting them).  And so many amphibian characteristics arose in shallow
> water, their invasion of land would have been mainly due to the selective
> advantage of actively evading predators and/or taking advantage of early
> land plants and early land arthropods as a food source.  This would have
> little to do with being "constantly thrust out of the water."
>                      -------------Ken
>
> ________________________________
> From: Taxacom <taxacom-bounces at mailman.nhm.ku.edu<mailto:
> taxacom-bounces at mailman.nhm.ku.edu>> on behalf of John Grehan <
> calabar.john at gmail.com<mailto:calabar.john at gmail.com>>
> Sent: Friday, March 22, 2019 3:49 PM
> To: taxacom
> Subject: [Taxacom] Tectonic uplift as a mjor evolutionary process
>
> For those interested in biogeographic processes beyond 'chance' I highly
> recommend the following article which can be obtained from me or the
> author. Passive uplift should, in my opinion, be listed as one of the most
> significant evolutionary processes around (should be in all basic
> evolutionary text books). It is going on all the time and affected
> evolution from the beginning. The original establishment of terrestrial
> life was not from some metaphysical selective advantage (any more than
> lowland species are supposed to invade supposedly vacant alpine niches or
> habitats), but the outcome of marine coastal life being constantly thrust
> out of the water. Sooner or later some were going to survive and the rest
> is history.
>
> Heads, M. 2019. Passive uplift of plant and animal populations during
> mountain building. Cladistics
>
> If a community and its substrate are raised by tectonic uplift, the species
> present can either die out in the area, survive in situ unchanged, or
> survive in situ with adaptation and differentiation. The large-scale
> passive uplift of plant and animal populations during mountain-building is
> accepted in a growing number of studies, but the idea has seldom been
> examined critically. If passive uplift does occur, it has implications for
> interpreting community structure and speciation in some of the most
> biodiverse places on Earth, tropical mountains. It would also provide a
> simple explanation for many altitudinal anomalies, such as the occurrence
> of typical coastal elements at unusually high altitudes in certain
> localities. Examples include the coastal saltmarsh plant Salicornia at 4200
> m altitude in the rapidly uplifted Andes, coastal frogs and ferns in
> African mountains, and inland mangroves
> in New Guinea. The first aim of this paper is to review previous work on
> passive uplift worldwide and the main ideas that have been discussed. A
> second goal is to discuss possible tests of passive uplift.
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