MarBiolPHYTO

Dinoflagellatesareoftenabundant

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Unformatted text preview: shaped “shell” made of silica (silica is main component of beach Sand, rocks, or glass) As diatoms divide, the smaller shell As diatoms divide, the smaller shell becomes the larger shell on the new diatom • Thus half of the new generation will get smaller and smaller • To get bigger cells, the Diatoms have sex and New larger cells are formed New cell is back to original New cell is back to original size • Diatoms then divide by cell division And when they get too small, they Again have a sexual stage and form Larger cells. Some diatom species link up in chains. This Some diatom species link up in is thought to increase surface area to help keep them from sinking out of the euphotic zone. Diatom shells fall to the sediments Diatom shells fall to the sediments and can form thick sediments • This pinkish cliff is diatomaceous earth in Nevada Diatomaceous Earth is very pure Diatomaceous Earth and is used to filter beverages such as beer etc. • It is also used to kill insects (roaches etc) because the sharp edges penetrate their exosk...
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