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href=3D"mailto:naturens@chebucto.ns.ca">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. ------------------------------------------------------------ Frederick W. Schueler & Aleta Karstad Daily Paintings - http://karstaddailypaintings.blogspot.com/ Vulnerable Watersheds - http://vulnerablewaters.blogspot.ca/ Mudpuppy Night in Oxford Mills - http://pinicola.ca/mudpup1.htm RR#2 Bishops Mills, Ontario, Canada K0G 1T0 on the Smiths Falls Limestone Plain 44* 52'N 75* 42'W (613)258-3107 <bckcdb at istar.ca> http://pinicola.ca/ ------------------------------------------------------------
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