Nitrogen fixation (acetylene reduction) on a coral reef |
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| Authors: | N. Shashar T. Feldstein Y. Cohen Y. Loya |
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| Affiliation: | (1) H. Steinitz Marine Biology Laboratory, The Interuniversity Institute of Eilat, PO Box 469, 88103 Eilat, Israel;(2) Department of Zoology, George S. Wise Faculty of Life Sciences, Tel Aviv University, 69978 Tel Aviv, Israel;(3) Division of Microbial and Molecular Ecology, Life Science Institute, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel;(4) Present address: Department of Biological Sciences, University of Maryland, Baltimore County, 21228 Catonsville, MD, USA |
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| Abstract: | ![]()
Nitrogen fixation rates associated with various substrates on a fringing reef at Eilat, Red Sea, were estimated by in situ acetylene reduction. High rates of acctylene reduction were associated with bare substrates, such as sand and dead coral skeletons. Low rates of acetylene reduction were associated with substrates covered by macroalgae or living coral tissue. Estimates of nitrogen fixation in various reef zones, based on these measurements, indicate that the sand-covered lagoon is responsible for more than 70% of the fixation in the reef. Consequently, the lagoon may serve as an important source of nitrogen for the coral reef community. |
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