Diatoms and red algae, light micrograph

Diatoms and red algae, light micrograph

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Caption: Diatoms and red algae. Darkfield illuminated polarised light micrograph of individual Eunotia sp. diatoms (long, green) and a colony (oval, centre) amongst Batrachospermum sp. freshwater red algae (lobed). Diatoms are single-celled photosynthetic algae, of which there are about 100,000 species. They have mineralised cell walls (frustules) that contain silica and provide protection and support. They form an important part of the plankton at the base of the marine and freshwater food chains. Magnification: x400, when printed 10 centimetres wide.

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Keywords: alga, algae, algal, aquatic, batrachospermum sp., biological, biology, botanical, botany, calcareous, calcium carbonate, dark-field illumination, darkfield illuminated, diatom, diatoms, eunotia sp., flora, freshwater, frustule, light micrograph, light microscope, marine, marine biology, micro-organism, micro-organisms, microbiological, microbiology, microorganism, microorganisms, microscopic, mineralised cell wall, nature, no-one, nobody, photosynthetic, phytoplankton, plankton, planktonic, plant, plants, polarised light, red algae, silica, single-celled, unicellular, wildlife, zoological, zoology

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