Diatoms,SEM

Numéro d’image : 11697723
Diatoms,SEM
Diatoms. Coloured scanning electron micrograph (SEM) of two diatoms (navicula sp.). Diatoms may be extremely abundant in both freshwater and marine ecosystems; it is estimated that 20% to 25% of all organic carbon fixation on the planet is carried out by diatoms. This is possible because they contain chlorophyll. Diatoms are a major food resource for marine and freshwater microorganisms and animal larvae,and are a major source of atmospheric oxygen. A unique feature of diatom cells is that they are enclosed within a cell wall made of silica (hydrated silicon dioxide) called a frustule. Magnification: x500 when printed at 10 centimetres wide
Licence : Droits gérés
Crédit: Science Photo Library / Gschmeissner, Steve
Taille de l’image : 4572 px × 4139 px
Model Release : Non requis
Property Release : Non requis
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