F col SEM of surface of rock, showing water bear

F col SEM of surface of rock, showing water bear

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Credit: DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY

Caption: False-colour scanning electron micrograph of the surface of a rock showing a tardigrade, or water bear, Macrobiotus sp., surrounded by filamentous blue-green algae (Nostoc sp.). The tardigrade is a segmented animal 0.1-1.0mm long. Cylindrical in shape, it has four stumpy legs terminating in large claws. Tardigrades can survive years at a time in a dehydrated "capsule" state & then swell up & return to life when they encounter water. They live in coastal waters, ditches, lakes, & in moss clumps on rocks, walls & roofs. Such environments are subject to drastic temperature changes & desiccation. Magnification: x185 at 6x4.5cm size, x100 at 35mm size.

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Keywords: algae, animal, blue green algae, blue-green, blue-green algae, cyanophyta, invertebrate, invertebrates, jbu colouring, macrobiotus sp., microenvironment of a rock, nature, tardigrada, tardigrade, water bear, wildlife, zoology

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