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Pea/fingernail clams


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#21 gerald

gerald
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  • Wake Forest, North Carolina

Posted 28 July 2017 - 09:44 AM

Auban wrote:  "The thing I find interesting to think about is that drainage ditches are entirely man made structures. They are providing environments for all kinds of little critters to live in that may otherwise have no other suitable habitat later on down the road."

 

In most cases, a drainage ditch is a man-made replacement for a natural drainageway (stream or wetland).  These sites presumably had all sorts of native critters for millenia before they were converted into ditches.  Relatively few ditches are "entirely man made" (in places that were not waters or wetlands prior to ditching).  This is a hot button in the arguments for and against regulating construction impacts to "ditches" to protect water quality.


Gerald Pottern
-----------------------
Hangin' on the Neuse
"Taxonomy is the diaper used to organize the mess of evolution into discrete packages" - M.Sandel


#22 Auban

Auban
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Posted 29 July 2017 - 11:15 PM

I wouldn't argue that the environment was there for these critters before we obliterated them and constrained them to mere roadside ditches. I'm mostly interested in knowing what happens to those tiny communities. I would think that any affects that we can produce on them would be much more immediately visible than affects we have on larger aquatic ecosystems.

To me, they seem like an opportunity to study the effects of farm runoff, pollution, etc. They aren't exactly large... Just a little bit of change would probably be easily and quickly observable.

Anyway, to dispel any doubts that I may have clam shrimp, here is a pic of one of the little clams climbing up the side of its tank: https://vgy.me/r6Csvr.jpg
"The ecologist is continually having to look at the aspects of nature with which he is unfamiliar and perforce must be an amateur for much of his working time.... professionals may carp at omissions, misconstructions, or even downright errors in these pages. perhaps ultimately they may forgive them for the sake of the overall vision that only the amateur, or the ecologist, blithely sets out to experience."G. Evelyn Hutchinson

#23 gerald

gerald
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  • Wake Forest, North Carolina

Posted 30 July 2017 - 08:14 AM

Looks just like a booger that my kid flicked on a tank once.  Re ditches, yup, just one uncaptured oil change, radiator hose failure, or car wreck could pretty much render a ditch uninhabitable for gill-breathing critters for a year or more.  And in places with public water systems, hydrant flushing poisons them with chlorine a couple times a year (and the headwater creeks they flow into).  Chlorine is gone much quicker than motor oil or antifreeze, but the frequency of  impacts doesn't allow much chance for recolonization.


Gerald Pottern
-----------------------
Hangin' on the Neuse
"Taxonomy is the diaper used to organize the mess of evolution into discrete packages" - M.Sandel


#24 mattknepley

mattknepley
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  • Smack-dab between the Savannah and the Saluda.

Posted 30 July 2017 - 01:37 PM

Booger Clam does seem to be an accurate moniker!
Matt Knepley
"No thanks, a third of a gopher would merely arouse my appetite..."




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