Oxygen in the ponds: it’s going on up

[Click the graph for a clearer picture].

Pretty crazy weather here in Abingdon: snowed today so new pond now has slush on top of ice.

Old pond ice has now melted.

Oxygen in the old pond has gone up remarkably over the last couple of days, peaking yesterday and now dropping down a bit. 20 milligrammmes of oxygen in each litre of water is as high as my meter goes!

The new pond is back to the level when it first iced over, around its normal value.

The big test now is to see how the snow cover – and associated very low oxygen levels (for this pond) – affected animal life in the pond.


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