What are they doing in winter?
In fact, this is not a modern question. R. Sydney Harper, member of the
famous British Royal Microscopical Society has been thinking about this topic
already half a century ago and has left a report for us:
"A few month ago the water in the bird-bath was teeming
with these organisms, and then a frost came and the water was frozen solid.
On thawing, I examined the water again, and found that these little animals
were still alive and active".
[many thanks to B. Krause, U.K., for the literature hint]
From this we do have an answer already. Everything goes on in winter.
Tardigrades apparently have no problem with a little bit of body-freeze
and body re-thawing.
The consequence for us microcopy amateurs is that we can go on watching
tardigrades also in winter. Just go ahead and try in a real snow scenario
(to international readers: we hope that there is a little bit of snow in
your country from time to time as well) |