Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Evidence for the existence of two morphologically distinct species of Egregia menziesii (Laminariales, Phaeophyta) and related ecological interactions
Student Author(s): Englund, Matthew Aaron
Faculty Advisor(s): Goff, Lynda
Pages: 31
Location: Senior Thesis UC Santa Cruz
Date: May 1992
Keywords: DNA, ecology, Egregia menziesii var. menziesii, gregia menziesii var. laevigata, Laminariales, morphology, rachii, taxonomy, transplant, tuberculate, Cabillo Point Pacific Grove, Davenport Landing, Pleasure Point Soquel, Hopkins Marine Life Refuge, HMLR
Abstract: Egregia menziesii appears ecologically in many different forms which have elicited certain aspects of confusion in its classification since the late 1800's (Chapman 1962 and Smith 1944). Although many distinct populations do exist, Egregia is presently considered to be a monotypic genus with much morphological variation. According to Abbott and Hollenberg (Marine Algae of Calif., 1976), there is much variation in Egregia populations between Los Angeles and Cape Mendocino. These authors mention that Northern populations (Alaska to Cape Mendocino) have tuberculate rachii and smooth sporophylls while Southern populations (Los Angeles into Baja Califonria) have smooth rachii and wrinkled sporophylls. Populations found in the Channel Islands and from the vicinity of Cape Mendocino to Ventura County possess every possible combination of features observed in the geographic extremes and include a few unique vegetative and reproductive morphologies as well (See figure 1). Findings presented in this research project argue that there may be two species rather than a monotypic genus of Egregia menziesii based upon observed morphological development and largely exclusive environments in which each species is found...