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Hello:
Would not many forms of zooplankton species
Feed directly on soup that is made out of feces ?
And thus form a meal for the next larger size
Until some can be seen using unaided eyes.
Yt, DW, Kentville
----- Original Message -----=20
From: Dusan Soudek=20
To: naturens@chebucto.ns.ca=20
Sent: Tuesday, January 06, 2015 6:59 PM
Subject: RE: [NatureNS] Sewer Strolls: Before and After Harbour =
Cleanup ?
These are interesting observations. I can see how fertilizing a =
harbour with sewage will increase its primary production and shift if =
from attached plants (kelp, eelgrass, etc.) to phytoplankton. But I =
doubt that the unmentionables we flush down our toilets are directly =
available to seabirds and seals as food. The stuff forms local sewage =
upwellings (sewage is warm), is dispersed by tidal currents, and broken =
down by decomposers, which eventually liberate the phosphates and =
nitrates...=20
Dusan Soudek=20
On January 6, 2015 at 12:40 PM jen cooper <iffercooper@hotmail.com> =
wrote:=20
Hello all,=20
I can't speak to Halifax Harbour but for comparison...=20
The Sydney side of Sydney harbour was fitted with wastewater =
infrastructure within the last ten years. Since the diversion of =
wastewater the clusters of diving ducks and seals, have either left or =
are very obviously not as plentiful as they used to be. On the west side =
of the harbour where infrastructure is yet to come (but on the way!) =
ducks still frequent the outfalls.=20
My two cents on why, are these:=20
Wastewater does cause eutrophication, fertilizing plants and algae =
(an onwards up the web). Food availability would definatley be different =
at outfalls than where there are none.=20
Often times, here, the warmer water at outfalls causes openings in =
the ice. In some areas these are the only access points to the water.=20
:) Jen=20
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---
From: soudekd@ns.sympatico.ca=20
To: naturens@chebucto.ns.ca=20
Subject: Re: [NatureNS] Sewer Strolls: Before and After Harbour =
Cleanup ?=20
Date: Sun, 4 Jan 2015 18:21:18 -0400=20
Joanne,=20
an excellent question. A broader one is what is it that attracts =
birds to the outfalls? The warm temperature of the discharge? it seems =
that a lot of the herring and great black-backed gulls that used to =
frequent the Point Pleasant Park outfalls were just bathing. Lots of =
preening, wind fluttering, etc. is the attraction the fish that are =
themselves attracted to this warm water? The sewage itself?=20
Dusan Soudek=20
=20
=20
From: Joanne Cook=20
Sent: Sunday, January 04, 2015 5:44 PM=20
To: naturens@chebucto.ns.ca=20
Subject: Re: [NatureNS] Sewer Strolls: Before and After Harbour =
Cleanup ?=20
=20
Dusan,=20
I was wondering the same thing yesterday, and also wondering about =
the temperature of the current effluent, and what effects it has - if =
any - where it emerges.=20
cheers,=20
Joanne=20
=20
____________________________________=20
=20
Do not meddle with the Forces of Nature, for you are small, =
insignificant, and biodegradable.=20
____________________________________=20
=20
On Sun, Jan 4, 2015 at 5:25 PM, Dusan Soudek =
<soudekd@ns.sympatico.ca> wrote:=20
Just curious: Have there been any noticeable changes in the =
numbers and species of waterfowl associated with Halifax Harbour sewer =
outlets since the Harbour Solutions project was completed? Only a small =
percentage of the city=E2=80=99s raw sewage gets dumped into the harbour =
these days, more so after periods of heavy rainfall when the sewage =
plants are overwhelmed by discharge from combined sewers...=20
Dusan Soudek=20
=20
=20
=20
=20
=20
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<DIV>Hello:</DIV>
<DIV> Would not many forms of zooplankton species</DIV>
<DIV>Feed directly on soup that is made out of feces ?</DIV>
<DIV>And thus form a meal for the next larger size</DIV>
<DIV>Until some can be seen using unaided eyes.</DIV>
<DIV>Yt, DW, Kentville</DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"=20
dir=3Dltr>
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: =
black"><B>From:</B>=20
<A title=3Dsoudekd@ns.sympatico.ca =
href=3D"mailto:soudekd@ns.sympatico.ca">Dusan=20
Soudek</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dnaturens@chebucto.ns.ca=20
href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, January 06, 2015 =
6:59=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: [NatureNS] Sewer =
Strolls:=20
Before and After Harbour Cleanup ?</DIV>
<DIV><BR></DIV>
<DIV>These are interesting observations. I can see how fertilizing a =
harbour=20
with sewage will increase its primary production and shift if =
from=20
attached plants (kelp, eelgrass, etc.) to phytoplankton. But I doubt =
that the=20
unmentionables we flush down our toilets are directly available=20
to seabirds and seals as food. The stuff forms local sewage =
upwellings=20
(sewage is warm), is dispersed by tidal currents, and broken =
down by=20
decomposers, which eventually liberate the phosphates and nitrates...=20
<BR>Dusan Soudek </DIV>
<BLOCKQUOTE=20
style=3D"POSITION: relative; BORDER-LEFT: blue 1px solid; =
PADDING-LEFT: 10px; MARGIN-LEFT: 0px"=20
type=3D"cite">On January 6, 2015 at 12:40 PM jen cooper=20
<iffercooper@hotmail.com> wrote: <BR><BR>
<DIV dir=3Dltr>Hello all, <BR><BR>I can't speak to Halifax Harbour =
but for=20