by Roland Mortimer, Brazil
to the articles produced by Jan Parmentier and the Dutch Club (see footnote)
I became interested in studying marine diatoms for the first time in my
life. A friend of mine who dives and hunts fish as his hobby, kindly brought
me samples from different sea depths in wine and beer bottles. He (Osman)
and his wife Célia, apparently barbeque the fish he catches and
obviously drink a lot of wine with it, hence the enormous supply of wine
bottles. I was amazed at the diversity of species in such a small sample
of water simply collected as a 'scooped up' sample.
sea at this time of the year is at a temp. of about 19ºC, and the
sunlight is reasonably constant and bright, excellent for diatom growth.
Although most diatoms are fairly cosmopolitan and most species can be found
almost anywhere, they have become adapted to their warmer environment and
do pretty well in it, even at a depth of seven meters.
suggested I observe the diatoms in a living state first before cleaning
them of their protoplasts. He was absolutely right, they are really much
more beautiful alive and give much more enjoyment than looking at an empty
mounted frustule. Here are just a few of the many photographs I took of
the multitude of species from this beautiful area on the Southern coast
of Rio. I am very grateful to Jan for his help in identifying these specimens
and also for his encouragement.
Editor's footnote: Jan's articles on marine diatoms and other articles on diatoms can be found in the Micscape Library by typing in diatoms in the Search facility. Library link below.
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