Drying processes in the Antarctic collembolan Cryptopygus antarcticus (Willem)

Harrisson, Paul M.; Rothery, Peter; Block, William. 1991 Drying processes in the Antarctic collembolan Cryptopygus antarcticus (Willem). Journal of Insect Physiology, 37 (12). 883-890.

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Live and dead specimens of the Antarctic collembolan Cryptopygus antarcticus (Willem) dry, under constant external conditions of temperature (25 or 35°C) and r.h. (0%), like most hygric soil arthropods. The drying curves of both live and dead specimens have three phases: an initial decrease; a constant rate period and a final falling rate period. The latter is exponential. Cryptopygus dries throughout these phases in a purely physical, passive manner. The constant rate period is not indicative of active metabolic or physiological regulation of water loss. The entire drying curve can be explained using drying theories developed for porous, hygroscopic solids. A similar situation pertains in the Antarctic lichen Umbilicaria antarctica Frey et Lamb. Geometrically, the percentage of water remaining at the onset of the falling rate period is related to the hydrated thickness of the collembolan cuticle or the lichen cortices. For Cryptopygus the hydrated thickness is estimated as 14 μm.

Item Type: Publication - Article
Digital Object Identifier (DOI):
ISSN: 00221910
Additional Keywords: Collembola, springtail, Antarctic, rate of drying, conductance, hygroscopic, sorptional, porous solid, lichen
Date made live: 09 May 2018 08:47 +0 (UTC)

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