The Society for Research into Higher Education

Ian Kinchin

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Survival in extreme environments

By Ian Kinchin

When I was actively researching biology (rather than education), a high point for me was when I was able to contribute to the naming of a new species (Bertolani and Kinchin, 1993). That was quite a buzz, and i still have a strange affection for Ramazzottius varieornatus – even though almost nobody has ever heard of it.

The Tardigrada is a particularly fascinating group of invertebrate animals. Whilst tardigrades are basically aquatic animals, they are able to survive periods of drought by desiccating their bodies. When in this dry, dormant state, their bodies are extremely resistant to environmental extremes that would normally be fatal. The animals can stay in this state of suspended animation – described as anhydrobiosis (life without water) or cryptobiosis (hidden life) – for months or even years (see Mobjerg et al, 2011; Welnicz et al, 2011). Once favourable environmental conditions are restored, the animals are able to rehydrate and continue their lives. Continue reading