Authors contributed equally.
Supercooling point frequency distributions in Collembola are affected by moulting
Article first published online: 19 APR 2006
Volume 20, Issue 2, pages 323–329, April 2006
How to Cite
WORLAND, M. R., LEINAAS, H. P. and CHOWN, S. L. (2006), Supercooling point frequency distributions in Collembola are affected by moulting. Functional Ecology, 20: 323–329. doi: 10.1111/j.1365-2435.2006.01089.x
- Issue published online: 19 APR 2006
- Article first published online: 19 APR 2006
- Received 25 July 2005; revised 7 November 2005; accepted 8 November 2005 Editor: C. Fox
- Ceratophysella denticulata;
- 1Many arthropods depress the freezing point of their body fluids (supercool) to avoid freezing at subzero temperatures. This is normally a seasonal response and is achieved by the production of specific biomolecules including cryoprotectants, a cessation in feeding, and the removal or masking of ice-nucleating material from their bodies.
- 2In springtails, the mid-gut is shed during moulting which results in the complete evacuation of the gut and a concomitant reduction in the supercooling point (SCP). We determined whether this non-adaptive explanation could account for the variability observed in the SCP of summer-acclimatized springtails.
- 3Moult preparation resulted in a highly significant reduction in the SCP. Feeding after moulting restored the SCP to previous high levels.
- 4Significant differences in SCP between springtails sampled from vegetation and the soil surface, on different days, and at different sites on the same day were also documented, demonstrating that not all variation in SCP is environmentally induced.
- 5Investigations of the responses of the SCP to environmental variation in springtails and other arthropods should take into account the effects of moulting before solely adaptive conclusions are drawn.