Pennate Diatom Colony (asterionella Sp.) #4 is a photograph by Dennis Kunkel Microscopy/science Photo Library which was uploaded on October 4th, 2018.
Pennate Diatom Colony (asterionella Sp.) #4
Coloured scanning electron micrograph (SEM) of fresh water pennate diatom colony (Asterionella sp.). Asterionella are planktonic fresh water diatoms... more
Title
Pennate Diatom Colony (asterionella Sp.) #4
Artist
Dennis Kunkel Microscopy/science Photo Library
Medium
Photograph
Description
Coloured scanning electron micrograph (SEM) of fresh water pennate diatom colony (Asterionella sp.). Asterionella are planktonic fresh water diatoms found worldwide. The cells are joined at the broadest apex by mucilage pads to form stellate or spiral colonies. Some populations are particularly susceptible to chytrid infestations. This genus is a biological indicator of hard water. The body or frustule of each pennate cell in the colony is composed of two halves which fit tightly together. The cell walls contain silica dioxide (glass) which are preserved in deposits known as diatomaceous earth. Diatoms represent about 25% of the plant biomass in the world. These microscopic unicellular plants are important biomass and oxygen producers. Magnification: x140 when shortest axis printed at 25 millimetres.
Uploaded
October 4th, 2018
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