Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: The effects of grazing by the prosobranch gastropods, Tricolia pulloides and Barleeia haliotiphila, on Epiphytic microalgae growing on the red alga, Rhodoglossum affine
Student Author(s): Chun, Stephen A.
Faculty Advisor(s): Burnett, Robin
%E Abbott, Donald
%E Abbott, Isabella
Pages: 24
Location: Final Papers Biology 175H
Date: June 1979
Keywords: midtide forest community
Abstract: Grazing pressure on the epiphytes on the fronds of the intertidal red alga, Rhodoglossum affine, was manipulated by adding and removing herbivorous gastropods. The green alga, Endophyton, and dense pennate diatom populations were found to be the most abundant epiphytes in percentage of frond area covered. The primary grazers were found to be the prosobranch gastropods, Tricolia pulloides, Barleeia haliotiphila, Tegula funebralis, and Tegula brunnea. Grazing by T. pulloides and B. haliotiphila was found to reduce the percentage of frond area covered by dense growths of pennate diatoms.