Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: The ecological effect of Batillaria attramentaria on the Elkhorn Slough mudflat
Student Author(s): Schafer, Kate
Faculty Advisor(s): Powers, Dennis
Pages: 18
Location: Final Papers Biology 175H
Date: June 1991
Abstract: The impact of the introduced mudflat grazer, Batillaria attramentaria on the ecosystem in Elkhorn Slough was studied by building cages to exclude the snails from plots of sediment. Sediment samples were collected from the exclosures and from controls areas where the snails were present. These samples were then analyzed for chlorophyll a concentration as a measure of diatom productivity. The high variation within the environment, both spatially and temporally, obscured the effects of the snails. Therefore, the population dynamics of the diatoms must first be elucidated before the effects of snails can be determined.