If importance is the magnitude of ecological effect - for those of us
in North America in these latter days it's Dreissena - and the shells
are available in uncountable myriads for those who wish to collect them.
fred.
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Frederick W. Schueler & Aleta Karstad
Mudpuppy Night - http://pinicola.ca/mudpup1.htm
Vulnerable Watersheds - http://vulnerablewaters.blogspot.ca/
study our books - http://pinicola.ca/books/index.htm
RR#2 Bishops Mills, Ontario, Canada K0G 1T0
on the Smiths Falls Limestone Plain 44* 52'N 75* 42'W
(613)258-3107 <bckcdb at istar.ca> http://pinicola.ca/
"[The] two fundamental steps of scientific thought - the conjecture
and refutation of Popper - have little place in the usual conception
of intelligence. If something is to be dismissed as inadequate, it is
surely not Darwin [, whose] works manifest the activity of a mind
seeking for wisdom, a value which conventional philosophy has largely
abandoned." Ghiselen, 1969. Triumph of the Darwinian Method, p 237.
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