Bryazoans- perhaps a natural carbon sink-

[Qaanaaq]

http://www.bbc.co.uk/news/science-environment-12524042

[Clifford]

http://www.bbc.co.uk...onment-12524042

It isn't one organism, but many different organisms that grow better with more CO₂, and warmer weather. Especially in the polar regions where a slight increase of temperature could be very beneficial. I'm sure that would be true both on land and sea.

There is always a question of "Carbon Sink" vs "Carbon Cycle".

I suppose if the equilibrium is pushed towards more plant matter, then there is at least a short period of increased carbon sequestration. Such an effect would likely level off as the growth/decay cycle is balanced out.

A true carbon sink would be the places where one gets plant growth without consumption or decay. Perhaps there are places in the deep ocean where this would be the case, or in polar areas.

Or, if there was anything that would stimulate clathrate growth in the oceans, then that would act as a true carbon sink.

Hmmm...

So, we need to know whether the clathrates are growing or shrinking.

Looking at oxygen and methane.

Oxygen to the right. North Pacific nearly anoxic at 1000m

Ocean Methane Concentration

http://seajellyexhibit.blogspot.com/2010/08/solving-ocean-methane-paradox.html

There is an interesting "blip" in the methane production at the anoxic level of 900m.

So, organisms in the oceans produce methane.

The oceans also release methane.

But.

Are the clathrate quantities increasing?