NDLI: Thermal limits of burrowing capacity are linked to oxygen availability and size in the Antarctic clam Laternula elliptica

Content Provider	Springer Nature Link
Author	Peck, Lloyd Samuel Morley, Simon Anthony Pörtner, Hans Otto Clark, Melody Susan
Copyright Year	2007
Abstract	Animal responses to changing environments are most commonly studied in relation to temperature change. The current paradigm for marine ectotherms is that temperature limits are set through oxygen limitation. Oxygen limitation leads to progressive reductions in capacity to perform work or activity, and these are more important and proximate measures of a population’s ability to survive. Here we measured the ability of a large Antarctic clam to rebury when removed from sediment at temperatures between −1.5 and 7.5 °C and at three oxygen concentrations, 10.2, 20.5 and 27.7%. The proportion of the population capable of reburying declined rapidly and linearly with temperature from around 65% at 0 °C to 0% at 6 °C in normoxia (20.5% O2). Decreasing oxygen to 10.2% reduced temperature limits for successful burial by around 2 °C, and increasing oxygen to 27.7% raised the limits by 1–1.5 °C. There was an interactive effect of body size and temperature on burying: the temperature limits of larger individuals were lower than smaller animals. Similarly, these size limits were increased by increasing oxygen availability. Considering data for all temperatures and oxygen levels, the fastest burying rates occurred at 3 °C, which is 2 °C above the maximum summer temperature at this site.
Starting Page	479
Ending Page	484
Page Count	6
File Format	PDF
ISSN	00298549
Journal	Oecologia
Volume Number	154
Issue Number	3
e-ISSN	14321939
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-09-26
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Activity Temperature Climate change Critical temperature Aerobic scope Size Plant Sciences Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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