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I have to admit that in this case I identified the slick without being close
to it, since it was covering the centre of the pond. But it looks like a
grayish very thin oil-slick, with stuff like you mentioned caught up in and
on it, and if you run a stick or finger through it, the cracks stay put and
don't run back together like they would if it was oil or gasoline. These
bacterial slicks are very common on small stagnant puddles and in
salt-marshes. Cheers from Jim
----------
From: David & Alison Webster <dwebster@glinx.com>
Reply-To: naturens@chebucto.ns.ca
Date: Tue, 21 Aug 2007 13:03:01 -0300
To: naturens@chebucto.ns.ca
Subject: Re: [NatureNS] pond life in Irving Gardens, hornets on sw. milkweed
flowers, other flowers at Gardens
Jim Wolford wrote:
>Aug. 20, 2007 -
>
>(also a bacterial scum
>covered the surface of the pond, whose surface was protected from the wind),
>
Hi Jim, Aug 21, 2007
How do you distinguish between bacterial scum on the one hand and
general purpose pond scum (spores, pollen, fragments of hydrophobic
materials, algae...) on the other ?
DW, Kentville
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