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metal prints nature metal prints alga metal prints aquatic metal prints biological metal prints biology metal prints botanical metal prints botany metal prints chlorophyll metal prints colored metal prints coloured metal prints diatom metal prints false color metal prints false colour metal prints false-coloured metal prints flora metal prints

photographs nature photos alga photos aquatic photos biological photos biology photos botanical photos botany photos chlorophyll photos colored photos coloured photos diatom photos false color photos false colour photos false-coloured photos flora photos

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Diatom (Podosira sp.). Coloured scanning electron micrograph (SEM) of a single diatom. 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 thus 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: x1000 when printed at 10 centimetres wide.

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