Re: Sequential Sympatric Speciation Across Trophic Levels
- From: "Entertained by my own EIMC Internetional Ptd. Lty." <ei_spamtrap_mc@xxxxxxxxxxxxxx>
- Date: Wed, 11 Feb 2009 16:11:25 -0500 (EST)
"John Edser" <edser@xxxxxxxxxxxxxx> wrote in message
news:gmpqj2$1b7t$1@xxxxxxxxxxxxxxxxxxxxxx
"Robert Karl Stonjek" <rstonjek@xxxxxxxxxxxxxx> wrote
Sequential Sympatric Speciation Across Trophic Levels
Andrew A. Forbes, Thomas H.Q. Powell, Lukasz L. Stelinski, James J.
Smith,
Jeffrey L. Feder
A major cause for biodiversity may be biodiversity itself. As new species
form, they may create new niches for others to exploit, potentially
catalyzing a chain reaction of speciation events across trophic levels.
Darwinian individuals (fertile forms) act as both selectees and
selectors, i.e. simultaneously, Darwinian parents (as strictly,
mono-centric fertile form units of selection) constitute an environment
(selector) which can act on themselves (organic selection) but which may
also form a niche for newly evolving species. The greater this level of
ecological complexity becomes the more specialized species evolve to be.
Specialization critically increases Total Darwinian Fitness (TDF)
mutualization within an expanding area. Because TDF represents an
absolute (fixed total in time and not just a transient fitness measure)
it alone can act as a falsifiable frame of reference allowing increases
in the relative difference between TDF's per population to be measured.
Without TDF proposed as a Galilean (constant) fitness frame per parent
per population, all that can be ascertained is that one transient
fitness remains larger or smaller than another, i.e. _it cannot even be
known which was the largest or the smallest_ just that they were
different in one point in time.
Natural selection is always the default comparison (set intersection) of
each and every TDF per population. Increasing TDF absolute fitness via
increasing specialization and exchange increase the relative TDF
difference providing a much larger fitness range (the difference between
the largest and the smallest TDF within one population becomes larger).
The net result of a TDF range increase is that the selective force which
can now be applied becomes much larger, increasing in turn _the
intensity of natural selection and thus the rate of evolution_.
Hi John,
Because you above, in your use of your concept "TDF", are also clearly
implying the traditional (ordinary 'common-sensical') meaning of
"fitness" -- which, if someone would ask, I would say is {answer *entirely
prudently tweaked* to accomodate your TDF concept} "a capacity of
individuals to meet the challenges that their lifetime present them with
well enough to eventually have a chance to become grandparents" --, I wonder
if you are ready to INTEGRATE these your defacto "categorical
exemplification" of evolutionary pressures of "opportunity type" (and, by
extrapolation, also all other to our evolution relevant such
evolutionary/selective pressures) WITH (a subcategory of) adverse lifetime
challenges (i.e. negatively naturally selective - or directly "naturally
pruning" - pressures) that I accEPTably define as "specific/synaptic
hibernation imploring type settings/situations/stressors" [this definition
refers almost exclusively to environmental sources of such stimulation - the
only relevant exception is _not_ people's inescapable and potentially
overtaxing ordeal of being born, because the source of the stress is
environmental relative the individual being born, but the pain that the
birthing process typically presents women, who are in the process of giving
birth, with], AND - MOST IMPORTANTLY - that such lifetime challenges DID (as
they do today) 'put' CURSES (my concEPT for a by a SHI-type predicament
conditioned-in kind of "neural state" - a dynamic state that can be
described as a 'secondary SHI-type' pressure and an insidious threat that
demands to be somehow successfully coped with or else succumbed to) into our
most recent prehuman ancestor's central Nervous (or central Actention
Selection Serving) system.
BTW: The accumulation of "conditioned-in unconscious reverberations of such
(SHI-type) stressors effecting symptoms"] happened very commonly within our
prehuman ancestors. However, *not quite as commonly* as this happens to/in
the lifetime of modern humans!
P
.
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- Re: Sequential Sympatric Speciation Across Trophic Levels
- From: John Edser
- Re: Sequential Sympatric Speciation Across Trophic Levels
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