Nitrogen Fixation by a Blue-Green Epiphyte on Pelagic Sargassum
- 15 December 1972
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 178 (4066) , 1207-1209
- https://doi.org/10.1126/science.178.4066.1207
Abstract
Nitrogen fixation by Dichothrix fucicola, an epiphyte on pelagic Sargassum, was measured in May and June 1972 in the western Sargasso Sea and the Gulf Stream. This is the first report of nitrogen fixation by a heterocyst-bearing blue-green alga in the open ocean, and also the first observation of nitrogen fixation in the genus Dichothrix. Cellular carbon/nitrogen ratios suggested that the Dichothrix was nitrogen-starved. In dense aggregations of Sargassum, such as rafts or windrows, the enrichment of surface seawater with combined nitrogen from nitrogen fixation may be pronounced.Keywords
This publication has 7 references indexed in Scilit:
- Assay of Algal Nitrogen Fixation in the Marine Subtropics by Acetylene ReductionNature, 1970
- Nitrogen turnover in marine and brackish habitats IV. Uptake of the extracellular products of the nitrogen-fixing alga Calothrix scopulorumJournal of the Marine Biological Association of the United Kingdom, 1969
- Nitrogen turnover in marine and brackish habitats III. The production of extracellular nitrogen byCalothrix scopulorumJournal of the Marine Biological Association of the United Kingdom, 1969
- Acetylene reduction by nitrogen-fixing blue-green algaeArchiv für Mikrobiologie, 1968
- ESTIMATES OF IN SITU RATES OF NITROGEN UPTAKE BY TRICHODESMIUM SP. IN THE TROPICAL ATLANTIC OCEAN1Limnology and Oceanography, 1966
- HIGH NITROGEN FIXATION RATES IN THE SARGASSO SEA AND THE ARABIAN SEA1Limnology and Oceanography, 1964
- FURTHER MEASUREMENTS OF PRIMARY PRODUCTION USING A LARGE‐VOLUME PLASTIC SPHERELimnology and Oceanography, 1963