> -----Original Message-----
> From: Hoover, Jan J ERDC-EL-MS
> Sent: Tuesday, October 16, 2001 4:18 PM
> To: 'nanfa_at_aquaria.net'
> Subject: RE: NANFA-- Current Literature and a question
>
>
> Rob,
>
> I would call that the "boundary layer" - the first few mm or
> cm (depending
> on scale and bottom roughness) of water slowly dragging
> across the bottom.
> Benthic fishes built for station-holding (like darters) and
> small sturgeon
> exploit it as a low-energy way of maintaining position.
>
> - Jan
>
>
>
>
>
> -----Original Message-----
> From: Denkhaus, Robert
> Sent: Tuesday, October 16, 2001 4:11 PM
> To: 'nanfa_at_aquaria.net'
> Subject: RE: NANFA-- Current Literature and a question
>
>
> Thanks Jan! So the next obvious question is...is there an
> area known as
> "hyperheic" and would that be the zone directly above the
> bottom surface?
>
> > -----Original Message-----
> > From: Hoover, Jan J ERDC-EL-MS
> > Sent: Tuesday, October 16, 2001 4:06 PM
> > To: 'nanfa_at_aquaria.net'
> > Subject: RE: NANFA-- Current Literature and a question
> >
> >
> > "Now for the question...
> > "hyporheic habitat". I am not familiar with the terminology. Can
> > someone please clarify?"
> >
> >
> > Hyporheic refers to wetted area beneath the surface of the bottom
> > (substrate) of the stream (which I know sounds oxymoronic).
> > Its the tiny
> > interstitial spaces of the sand and gravel inhabited by
> > rotifers, copepods,
> > gastrotrichs, and water mites. Benthic biologists
> > collectively refer to
> > these really microscopic organisms as "meiofauna" and can
> > sample them in
> > some habitats with soda straws.
> >
> > The language of "bottom-pickers" is esoteric and it changes
> > over time. Not
> > too many years ago, the plant-and-animal felt that covered
> > submersed solid
> > objects was called "aufwuchs." Now the terms periphyton and
> > epifauna (and
> > specific variants) are more popular.
> >
> >
> >
>
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/-----------------------------------------------------------------------------
/"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
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/ For more information about NANFA, visit our web page, http://www.nanfa.org