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Hi Jen,
Sewage ponds and their outlets are quite simply the most nutrient rich area=
s that can be found and are filled with invertebrates. Whether they are loc=
ated in Nova Scotia, Ontario or Florida they are some of the best places to=
find birds associated with water and marshes. That's as long as there is s=
ome component of natural habitat included in them and they are not cement l=
ined, sterile pools as is usually the case in Quebec. One of my favorite me=
mories is Jim Wolford showing my field biology class the abundance of inver=
tebrates in a sewage pond sweep. Can you say Daphnia and Rat-tailed Maggot?=
Sure you can. Thanks Jim!
All the best,
Lance
Lance Laviolette
Glen Robertson, Ontario
From: naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca] =
On Behalf Of jen cooper
Sent: Tuesday, January 06, 2015 11:41 AM
To: naturens@chebucto.ns.ca
Subject: EXTERNAL: RE: [NatureNS] Sewer Strolls: Before and After Harbour C=
leanup ?
Hello all,
I can't speak to Halifax Harbour but for comparison...
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 pl=
entiful as they used to be. On the west side of the harbour where infrastru=
cture is yet to come (but on the way!) ducks still frequent the outfalls.
My two cents on why, are these:
Wastewater does cause eutrophication, fertilizing plants and algae (an onwa=
rds up the web). Food availability would definatley be different at outfall=
s than where there are none.
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.
:) Jen
________________________________
From: soudekd@ns.sympatico.ca<mailto:soudekd@ns.sympatico.ca>
To: naturens@chebucto.ns.ca<mailto:naturens@chebucto.ns.ca>
Subject: Re: [NatureNS] Sewer Strolls: Before and After Harbour Cleanup ?
Date: Sun, 4 Jan 2015 18:21:18 -0400
Joanne,
an excellent question. A broader one is what is it that attracts birds t=
o 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 flutterin=
g, etc. is the attraction the fish that are themselves attracted to this wa=
rm water? The sewage itself?
Dusan Soudek
From: Joanne Cook<mailto:jocook.ns@gmail.com>
Sent: Sunday, January 04, 2015 5:44 PM
To: naturens@chebucto.ns.ca<mailto:naturens@chebucto.ns.ca>
Subject: Re: [NatureNS] Sewer Strolls: Before and After Harbour Cleanup ?
Dusan,
I was wondering the same thing yesterday, and also wondering about the temp=
erature of the current effluent, and what effects it has - if any - where i=
t emerges.
cheers,
Joanne
____________________________________
Do not meddle with the Forces of Nature, for you are small, insignificant, =
and biodegradable.
____________________________________
On Sun, Jan 4, 2015 at 5:25 PM, Dusan Soudek <soudekd@ns.sympatico.ca<mailt=
o:soudekd@ns.sympatico.ca>> wrote:
Just curious: Have there been any noticeable changes in the numbers and =
species of waterfowl associated with Halifax Harbour sewer outlets since th=
e Harbour Solutions project was completed? Only a small percentage of the c=
ity's raw sewage gets dumped into the harbour these days, more so after per=
iods of heavy rainfall when the sewage plants are overwhelmed by discharge =
from combined sewers...
Dusan Soudek
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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca=
libri","sans-serif";color:#1F497D">Hi Jen,<o:p></o:p></span>=
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