Dissertation/Thesis Abstract

Frequency of Sublethal Thermal Stress Events Determines Tolerance to Subsequent High Temperature Challenges in California Mussels
by Prince, Christine, M.S., California State University, Long Beach, 2017, 57; 10638620
Abstract (Summary)

Climate change models predict increased frequency and intensity of extreme thermal events, suggesting that exposure to stressful high temperatures will likely become more common for many organisms. I investigated how frequency of exposure to sublethal temperature stress impacted the relative shell growth and size-specific tissue mass of the California mussel, Mytilus californianus . Mussels were exposed in the lab to 32 °C during simulated low tides 0, 1, 4, or 7 days per week for eight weeks or transplanted into rocky intertidal plots exhibiting a range of thermal conditions in the field for 12 weeks, then challenged with repeated exposures to a more extreme temperature (36, 39, or 42 °C) for 5 sequential days. As predicted by theory, increased frequency of exposure to sublethal heat stress invoked a cost to individuals, expressed as reduced shell growth or size-specific tissue mass, but also resulted in higher survival following subsequent exposure to potentially lethal temperatures.

Indexing (document details)
Advisor: Allen, Bengt J.
Commitee: Pernet, Bruno, Whitcraft, Christine
School: California State University, Long Beach
Department: Biological Sciences
School Location: United States -- California
Source: MAI 57/02M(E), Masters Abstracts International
Subjects: Ecology, Biological oceanography
Keywords: Climate change, Growth, Heat stress, Intertidal zone, Survival, Trade-off
Publication Number: 10638620
ISBN: 9780355575477
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