[Taxacom] Tectonic uplift as a mjor evolutionary process

John Grehan calabar.john at gmail.com
Fri Mar 22 17:57:29 CDT 2019


"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> 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> on behalf of John
> Grehan <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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