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Title: Filamentous Fungal Populations of Hawaiian Beaches 
Author: Dunn, Paul H.; Baker, Gladys E.
Date: 1984-07
Publisher: University of Hawai'i Press
Citation: Dunn PH, Baker GE. 1984. Filamentous fungal populations of Hawaiian beaches. Pac Sci 38(3): 232-248.
Abstract: Heterotrophic micro-organisms were studied on three Hawaiian
beaches-two of volcanic origin and one of carbonate. The volcanic beaches
consisted of coarse particles with little organic matter. The carbonate beach
consisted of coarse-to-fine, light-colored particles and contained more organic
material than the volcanic sands. Fungi populations of the three beaches differed
noticeably in their tolerance to temperature, salinity, and pH. In vitro testing of
selected fungi showed wide tolerance to salinity levels, less tolerance to the high
temperature of black sand, and no adaptation to alkaline pH levels. Heterotrophic
microbe populations were greatest in the supratidal zone, except for the
intertidal bacterial population of the black sand beach. In the subtidal black zone
of the carbonate beach, only bacteria were well established, actinomycetes were
absent, and fungi were few. Fifty percent of the fungi were common to any two of
the three beaches. Zonal decrease in numbers at all three beaches was attributed
to differences in submergence time.
ISSN: 0030-8870

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