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Appl Environ Microbiol. 1976 May; 31(5): 781-783
Copyright © 1976 American Society for Microbiology. All Rights Reserved.

N₂ Fixation Associated with Decaying Leaves of the Red Mangrove (Rhizophora mangle)

¹ Division of Biology and Living Resources, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida 33149

ABSTRACT

N₂ (C₂H₂) fixation was associated with decaying leaves of Rhizophora mangle. The process was predominantly anaerobic, with about two-thirds of the nitrogenase activity being light dependent. Average N₂ fixation rates in the light were 11 µg of N per g (dry weight) per h for leaves that had decayed for 2 to 3 weeks. This nitrogen input is probably significant in the estuarine, detrital food chains linked to R. mangle.

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