Foraminiferal Ecology, Ala Wai Canal, Hawai'i
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1995-10
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University of Hawaii Press
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Abstract
The foraminiferal fauna of the Ala Wai Canal, described for the
first time here, is controlled principally by the canal's shallow coastal location,
normal marine salinity range, sedimentation from a major point source, and
phytoplankton productivity. Various pollutants may have produced up to 7%
abnormalities in test growth, but low oxygen conditions in the back basin are
counterbalanced by food availability there to produce the largest surface
foraminiferal abundance of 140 tests per gram of sediment. For at least the past
50 yr, the Ala Wai Canal has harbored a foraminiferal assemblage dominated
by five species that compose from 53 to 92% of the foraminifera. These dominant
species, Ammonia beccarii (Linne) vars., Bolivinellina striatula (Cushman),
Cribroelphidium vadescens Cushman & Bronnimann, Quinqueloculina poeyana
d'Orbigny, and Quinqueloculina seminula (Linne), are widespread geographically,
but are generally found together in lagoons or embayments where
salinities are normal marine to hypersaline rather than in estuaries. The maximum
number of species per sample (31) was found near the entrance and the
diversity decreased into the canal.
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Resig JM, Ming K, Miyake S. 1995. Foraminiferal ecology, Ala Wai Canal, Hawai'i. Pac Sci 49(4): 341-366.
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