Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Aspects of the symbiotic relationship between the giant kelp, Macrocystis pyrifera and its principle epiphyte, Membranipora menbranacea (bryozoa)
Student Author(s): Magee, Scott
Faculty Advisor(s): Burnett, Robin
Pages: 33
Location: Final Papers Biology 175H
Date: June 1980
Keywords: symbiosis at the seashore
Abstract: 1. The distribution of the size classes of Membranipora on Macrocystis reflects the possiblitly that two different stocks exist at the surface and bottom intervals in the study sites observed. Membranipora colonies found that the bottom intervals were larger in mean size and more abundant than at the surface, particularly at the HMS Point site. 2. Bottom zooids were found to be significantly larger than surface zooids. 3. Bottom zooids of Membranipora are better able to cope with dessication stress. Surface zooids can withstand higher temperatures for longer periods of time. There is no signifcant difference in salinity tolerences between the two depth intervals. 4. Radioactive labeling experiment suggest that Membranipora receives some of its food supply from its host algae, Macrocystis.