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Re: Nature magazine article. review



A further comment on this --

It does point out an interesting fact, that niche modeling is not very well
developed or understood. In fact most niche models are nothing more than
statistical distributions, practically neutral models already. Both tend to
leave out very important processes, including adaptation, disturbance
history, and niche construction. If anything the paper shows how bad niche
modeling really is. I've suggested a model comparison project for this very
reason - the current models are really terrible and have a variety of
random assumptions thrown in. I looked at one - Biomapper - and found that
it did not represent a niche at all, but a statistical association of
indicators - the difference would take some explanation, but it was severe,
and undocumented.

JJK

At 09:09 AM 3/27/04 -0800, you wrote:
Dear Judith,

Not sure why it's such a mystery.  The formulae that
co-mingle several 'random distribution' vectors are
de facto generators of niches (or, ala standard complexity
notions, 'attractor basins').

If the concern is that the math is 'neutral' to what
any specific qualia/characteristics are for the possible
niches, then the only thing missing is identification
of this or that bundle of vectors as being associable
with one or another niche qualia, where they can be shown
to interactively track/map one another.

Might be an interesting empirical way to be able
to conceptually move between tiers of qualia in
'Roseneanly complex' systems.

James





> Judith Rosen wrote:
>
> Hi Folks,
>
> There is an article that was published last year in Nature magazine
about some
> ecology theories and models developed by two men; Hubbell and Bell.
Neutrality
> Theory, it's being called. I read it because my oldest child had a paper to
> write and thought some of "Pop's stuff" (her name for her grandfather)
might be
> applicable. She was right.
>
> I'm curious, before I infect the group with my own point of view, what
some of
> the ecologists think. The link is here:
> http://www.nature.com/nsu/020527/020527-13.html
>
> I would also like to get contact info for Hubbell, if anyone knows how to
> achieve that?
>
> Judith