As for Europe. As there are much more seashells than inlandshells in a certain place of the
Mediterranean or Atlantic there sure are more seashells in one place as in a compareable
localitiy are inlandshells. At the day of biodiversity at Hohenems in Vorarlberg in a certain
place collecting normal sized species and microshells I veryfied about 48 species. And this
is quite a lot in such an area.
with best regards
Helmut Nisters, now serious

Helmut "Helix" Nisters
Franz-Fischer-Str. 46
A-6020 Innsbruck / Austria / Europe
phone: 0043 / 512 / 57 32 14
e-mail: [log in to unmask]
web:    www.netwing.at/nisters/
           (please visit it and sign guestbook)
always looking for shellgrit from all over the world
for my nearly 89 years aged mother Irmgard
to makes happy and to keep up her health

office:
Natural History Department of the
Tiroler Landesmuseum Ferdinandeum Innsbruck
Feldstrasse 11 a
A-6020 Innsbruck / Austria / Europe
phone: 0043 / 512 / 58 72 86 - 37
web: www.tiroler-landesmuseum.at
        (specimen donations to the
         Tiroler Landesmuseum molluscs collection
         are always appreciated)

----------
I agree with Harry, I think.

Speak English next time....I'm from the South.   Kurt


At 06:27 PM 6/21/00 -0400, you wrote:
>Dear Liz et al.,
>
>The distribution of species collected at a single station by their
>frequency, given a good measure of biodiversity, always has a bunch of
>"stragglers" (only one or two examples of certain species).  A typical
>example (and one in which human selective factors had been minimized) is
>Charlotte Lloyd's report discussed recently in this forum
><http://home.sprynet.com/~wfrank/remarkab.htm>.  Look at all the species
>preceded by a "1"!
>
>Corollary to this pattern, which I have witnessed in fossil and Recent
>land, marine and aquatic field collections over 50 years of noodling for
>shells and their contents, is the fact that there WILL be additional taxa
>(given a diverse and robust regional fauna) on a revisit to the same
>collecting site.
>
>The numbers-crunchers can model this frequency distribution into some kind
>of chi-square or asymptotic transmogrification, but the "straggler" concept
>is good enough for me.  I think this experience is a paraphrase of Andy R's
>hypothetical melange of field trips to the Cretaceous pit and Liz's posting
>below.
>
>Now to tackle that recommended reading of high specific gravity prose (vide
>infra)!
>
>Harry
>
>
>At 06:26 PM 6/21/00 +0100, you wrote:
>>Dear all,
>>
>>As Andrew points out, the expectation is a curve which rises sharply
>>and then tails off. Since there is rarely enough time to exhaustively
>>collect and identify every specimen it is not surprising that
>>ecologists have devised various ways of estimating species diversity.
>>If anyone is interested, the friendliest book on the subject I know
>>is:
>>
>>Magurran, A.E. (1988) Ecological Diversity and its Measurement.
>>Chapman & Hall.
>>
>>From the replies coming in, it looks as if conch-l collectively has
>>some interesting data on the subject.
>>Liz
>Harry G. Lee
>Suite 500
>1801 Barrs St.
>Jacksonville, FL 32204
>USA   904-384-6419
><[log in to unmask]>
>Visit the Jacksonville Shell Club Home Page at:
>http://home.sprynet.com/~wfrank/jacksonv.htm
>
>oo  .--.  oo  .--.  oo  .--.
> \\(____)_ \\(____)_ \\(____)_
>  `~~~~~~~` `~~~~~~~` `~~~~~~~`
>