Date of Award

Spring 1973

Document Type


Degree Name

Master of Science (MS)


Ocean & Earth Sciences



Committee Director

Jacques S. Zaneveld

Committee Member

Harold G. Marshall

Committee Member

John C. Ludwick

Call Number for Print

Special Collections LD4331.O35B44


This study was initiated to investigate epiphytic diatoms at selected stations along the North Carolina coast and bay region. The relationships between these organisms and the season of the year and salinity and temperature of the water in which they were found are considered. The special affinity between the epiphytic diatoms and their host plants is also discussed. The specific data were analyzed statistically via linear correlation coefficients, graphs of least squares-best fit, and multiple linear regression analysis.

From the statistical tests, it was found that the mean number of epiphytic diatoms shows a significant multiple linear regression with respect to the pooled effects of salinity, temperature and season of the year. There appears to be a direct relationship between the presence or absence of Synedra pulchella and Cocconeis scutellurn.

There is indicated a direct relationship between the number of diatoms present on any particular host and the surface configuration of that host.

In the limited area studied there is a pronounced gradient of epiphytic diatoms that appears to follow not only latitudinal but 3lso seasonal and grazing pressures.


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