My study was designed to determine how different thermal defense strategies and the intensity of high temperature challenges might affect demographic and physiological performance of limpets on rocky shores. Found together in the high intertidal zone, Lottia scabra employs a constitutive thermal defense strategy, whereas L. austrodigitalis has an inducible one. I measured loss and growth rates of both species as a function of average daily maximum temperature exposure in the field, and respiration rates for field-collected and lab-acclimated individuals under benign conditions in the lab before and after exposure to one of five peak temperatures (14, 24, 28, 32, or 36 °C) during a 4.5-hour simulated low tide. L. scabra was relatively unaffected by exposure to high temperatures, whereas L. austrodigitalis exhibited significant increases in loss rates from experimental plates, decreases in growth rates, and increases in oxygen consumption, consistent with activation of the heat shock response.
|Advisor:||Allen, Bengt J.|
|Commitee:||Pace, Douglas, Pernet, Bruno|
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 57/02M(E), Masters Abstracts International|
|Subjects:||Biology, Ecology, Climate Change|
|Keywords:||Climate change, Growth, Limpet, Respiration, Rocky intertidal, Thermal defense|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be