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EXTREMOPHILE IMAGES
Bacteria that can withstand extreme heat are what cause the vibrant colours around hot springs in Yellowstone National Park in the USA. The water in the geysers and springs at the park can get to temperatures as high as 70ºC.
Credit: Steve Ford, Flickr
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Thermophilic bacteria, Yellowstone National Park
Thermophilic algae can survive and flourish in extremely high temperatures. The green algae seen here in Yellowstone National Park grows in water at around 50ºC.Credit: Anne Weston, LRI, CRUK, Wellcome Images.
Thermophilic algae, Yellowstone National Park
Microcystis is a type of bacterial algae that grows in waters with extremely high pH levels, such as Mono Lake in California. The cells are usually found organised into colonies like this and can produce and release harmful toxins.
Credit: Specious Reasons, Flickr
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Microcystis
These cyanobacteria (bacteria that get their energy from photosynthesis) are endoliths, extremophiles that can survive in extremely rocky terrain. Credit: hawkwing3141, Flickr
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Endolithic bacteria
In this aerial view of a salt pond, the microalgae Dunaliella salina, which love extremely salty conditions, create the bright pink colouring.Credit: Steve Jurvetson, Flickr.
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Dunaliella salina, a halophile
Honckenya peploides, commonly known as sea sandwort, is a halophile and can grow in extremely salty conditions – most commonly found near the beach.Credit: Bas Kers (NL), Flickr
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Sea sandwort, another halophile
Tardigrades, or water bears, are water-dwelling micro-animals that can survive extreme environments. For example, they can withstand extreme low and high temperatures, extreme pressure and doses of radiation that would be lethal for most animals, and they can go without food or water for
more than ten years.Credit: Bob Goldstein & Vicky Madden, tardigrades.bio.unc.edu
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Tardigrades from the Goldstein lab, UNC Chapel Hill
Certain species of pika, a small rodent found on rocky mountainsides, can live in extreme altitudes. The Himalayan pika, for example, can live at altitudes of up to 4,200 metres.
Credit: Philpete, Flickr
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A pika at extreme altitude
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• Cartoon illustrations are © Glen McBeth. We commission Glen to produce these illustrations for ‘Big Picture’. He is happy for teachers and students to use his illustrations in a classroom setting, but for other uses, permission must be sought.
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