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• W2044193787 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 169:295-301 (1998) - doi:10.3354/meps169295 Ammonium contribution from boring bivalves to their coral host--a mutualistic symbiosis? Ofer Mokady1,*, Yossi Loya2, Boaz Lazar3 1Institute for Nature Conservation Research and 2Department of Zoology, George S. Wise Faculty of Life Sciences, and the Porter Super-Center for Ecological and Environmental Studies, Tel-Aviv University, Tel-Aviv 69978, Israel 3The Institute of Earth Sciences and Moshe Shilo Minerva Center for Marine Biogeochemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel *E-mail: mokady@post.tau.ac.il ABSTRACT: The mytilid bivalve Lithophaga simplex is found to inhabit the scleractinian coral Astreopora myriophthalma in high densities. This boring bivalve, living inside the CaCO3 skeleton of the coral, produces considerable amounts of ammonium as a nitrogenous waste product. Ammonium production rate by the bivalves and consumption rate by the coral (via the symbiotic algae) were measured in laboratory experiments. The population density of L. simplex bivalves in A. myriophthalma corals was surveyed in the Nature Reserve Reef, Eilat, Red Sea, Israel. Ammonium production rate by the bivalves, inhabiting the coral at a density of 0.22 ± 0.11 bivalves cm-2, is calculated to be 8.2 ± 3.8 and 3.5 ± 1.6 nmol (cm2 coral)-1 h-1 during daytime and nighttime, respectively. Under conditions of low ammonium concentration (0.2 to 1.2 µM) the consumption rate of the coral ranged between 5 and 22 nmol cm-2 h-1. Thus, under naturally occurring levels of ammonium (<0.15 µM), recycling of nitrogenous waste produced by the bivalves (ammonium) may account for a significant portion of the needs of the coral/zooxanthellae. In contrast to the generally accepted view of boring bivalves as parasites of their coral hosts, it is hypothesized that the association between L. simplex and A. myriophthalma may also be an example of mutualistic symbiosis. The results indicate a possible pathway in the biogeochemical cycle of nitrogen in the coral reef environment. KEY WORDS: Ammonium · Boring bivalves · Symbiosis · Nitrogen cycle · Reef ecology Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 169. Publication date: August 06, 1998 Print ISSN:0171-8630; Online ISSN:1616-1599 Copyright © 1998 Inter-Research." @default.
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• W2044193787 title "Ammonium contribution from boring bivalves to their coral host--a mutualistic symbiosis?" @default.
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