I have some older book that is on the waters of the countys, there were
several of these published and I have some. They all rate on the pages that
deal with fertility of water ways by how high the pH and hardness are. Soft
tannic waters were labeled low and hard akaline waters like Lake Michigan
for example were labeled high. Funny how that never seemed to reflect real
life. Maybe their model ran off of some other regions statistics? I think
it was a bias against swamps, really.
I notice that even current distribution maps favor samples in metro areas
and the further from anywhere with high populations the less that is done.
Ray
/-----------------------------------------------------------------------------
/"Unless stated otherwise, comments made on this list do not necessarily
/ reflect the beliefs or goals of the North American Native Fishes
/ Association"
/ This is the discussion list of the North American Native Fishes Association
/ nanfa_at_aquaria.net. To subscribe, unsubscribe, or get help, send the word
/ subscribe, unsubscribe, or help in the body (not subject) of an email to
/ nanfa-request_at_aquaria.net. For a digest version, send the command to
/ nanfa-digest-request_at_aquaria.net instead.
/ For more information about NANFA, visit our web page, http://www.nanfa.org