[NatureNS] fish kill Port Williams skating pond

Date: Fri, 01 May 2015 16:10:14 -0400
From: Fred Schueler <bckcdb@istar.ca>
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  href=3D"mailto:naturens@chebucto.ns.ca"&gt;nature
On 5/1/2015 3:49 PM, David & Alison Webster wrote:

>      Just a guess in hindsight but with this cold weather in Jan. before
> significant snowfall and subsequent constant cold winter leading likely
> to sluggish or no flow into the skating pond, perhaps deep ice in the
> pond before significant snowfall (i.e. zero O2 influx, and small O2
> storage), a pond with trees nearby and outflow apparently by standpipe
> (i.e. a deep deposit of leaves in various stages of decomposition;
> significant O2 sink) and many fish (another O2 demand however small)
> perhaps anoxia could develop.

* that sounds plausible, and similar to situations I've seen around here 
- 
http://www.ontarioriversalliance.ca/anecdotes-winter-rivers-devoid-oxygen-frederick-schueler/

fred.
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