USF St. Petersburg campus Honors Program Theses (Undergraduate)

First Advisor

Heather Judkins, Ph.D., Assistant Professor, College of Arts and Sciences

Second Advisor

David John, Ph.D., Biology Instructor, College of Arts and Sciences


University of South Florida St. Petersburg

Document Type


Date Available

May 2014

Publication Date


Date Issued

April 2014


Ocean acidification is the result of uptake of atmospheric CO2 in the oceans. Anthropogenic CO2 emissions have increased rapidly since the start of the Industrial Revolution. Along with an increase in acidity, the ocean’s average temperature is rising from global warming. This study investigates the near-future (year 2100) effects of acidification and temperature on regeneration rates of the brittle star Ophiocoma echinata. Using HCl to induce acidification, regeneration rates for near-future conditions (pH 7.8 and temperature 30°C) did not decrease significantly from present conditions. Regeneration increased significantly with an increase in temperature alone, suggesting a complex interaction between temperature and acidity.


A thesis submitted in partial fulfillment of the requirements of the University Honors Program, University of South Florida St. Petersburg.

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