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Effect of Ammonium Enrichment on Animal and Algal Biomass of the Coral Pocillopora damicornis

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Item Summary Muller-Parker, G. McCloskey, L.R. Hoegh-Guldberg, O. McAuley, P.J. 2008-08-05T05:44:12Z 2008-08-05T05:44:12Z 1994-07
dc.identifier.citation Muller-Parker G, McCloskey LR, Hoegh-Guldberg O, McAuley PJ. 1994. Effect of ammonium enrichment on animal and algal biomass of the coral Pocillopora damicornis. Pac Sci 48(3): 273-283.
dc.identifier.issn 0030-8870
dc.description.abstract Algal and animal biomass parameters of colonies of the Pacific coral Pocillopora damicornis (Linnaeus) were measured as a function of time of exposure to elevated concentrations of seawater ammonium (20 and 50 uM [(NH4)2S04]) ranging from 2 to 8 weeks. Areal concentrations of zooxanthellae, chlorophyll, and protein increased with 20 uM ammonium addition. During the 8-week period of exposure to 20 uM ammonium, the population density of zooxanthellae increased from 3.5 to 7.5 x 105 cells cm-2, chlorophyll a content of zooxanthellae increased from 5.7 to 8.6 pg, and animal protein concentration doubled (from 0.74 to 1.38 mg cm-2). These data indicate that both the coral animal and the zooxanthellae respond to the addition of exogenous dissolved inorganic nitrogen provided as 20 uM ammonium. Growth of the symbiotic association in response to the addition of 20 uM ammonium adds further evidence to support the argument that growth of tropical symbioses is limited by the availability of nitrogen. However, the coral response is likely to depend on the concentration of ammonium provided, because the biomass parameters of corals held at 50 uM ammonium did not change significantly with time of exposure to the added nutrient.
dc.language.iso en-US
dc.publisher University of Hawaii Press
dc.title Effect of Ammonium Enrichment on Animal and Algal Biomass of the Coral Pocillopora damicornis
dc.type Article
dc.type.dcmi Text
Appears in Collections: Pacific Science Volume 48, Number 3, 1994

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