Abstract
Nitrogen fixation was investigated in Kaneohe Bay, Oahu, Hawaii, a subtropical eutrophic estuary, by using the acetylene reduction technique on algal samples. No active, planktonic, N2-fixing blue-green algae or bacteria were observed. However, Calothrix and Nostoc capable of fixing N2 were cultured from navigational buoys and dead coral heads. Nitrogen fixation associated with these structures was greater in the middle sector than in the south and north sectors of the estuary. Experiments demonstrated that the fixation was photosynthetically dependent. Examination of the data showed that there was no significant correlation between rates of nitrogen fixation and concentration of combined nitrogen compounds in the Bay water. Fixation was significantly correlated to the inorganic N/P (atomic) ratio in the south and middle sectors but not in the north sector. The nutrient data indicate there was a flux of combined nitrogen, but not phosphate, from the reef flats.
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Selected References
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- Allen M. M., Stanier R. Y. Selective isolation of blue-green algae from water and soil. J Gen Microbiol. 1968 Apr;51(2):203–209. doi: 10.1099/00221287-51-2-203. [DOI] [PubMed] [Google Scholar]
- DiSalvo L., Gundersen K. Regenerative functions and microbial ecology of coral reefs. I. Assays for microbial population. Can J Microbiol. 1971 Aug;17(8):1081–1089. doi: 10.1139/m71-171. [DOI] [PubMed] [Google Scholar]
- Horne A. J., Goldman C. R. Suppression of nitrogen fixation by blue-green algae in a eutrophic lake with trace additions of copper. Science. 1974 Feb 1;183(4123):409–411. doi: 10.1126/science.183.4123.409. [DOI] [PubMed] [Google Scholar]
- Schöllhorn R., Burris R. H. Acetylene as a competitive inhibitor of N-2 fixation. Proc Natl Acad Sci U S A. 1967 Jul;58(1):213–216. doi: 10.1073/pnas.58.1.213. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Stewart W. D. Algal metabolism and water pollution in the Tay region. Proc R Soc Edinb Biol. 1972;71(2):209–224. doi: 10.1017/s0080455x00012248. [DOI] [PubMed] [Google Scholar]
- Stewart W. D., Fitzgerald G. P., Burris R. H. Acetylene reduction by nitrogen-fixing blue-green algae. Arch Mikrobiol. 1968;62(4):336–348. doi: 10.1007/BF00425639. [DOI] [PubMed] [Google Scholar]
- Webb K. L., Wiebe W. J. Nitrification on a coral reef. Can J Microbiol. 1975 Sep;21(9):1427–1431. doi: 10.1139/m75-214. [DOI] [PubMed] [Google Scholar]
- Wiebe W. J., Johannes R. E., Webb K. L. Nitrogen fixation in a coral reef community. Science. 1975 Apr 18;188(4185):257–259. doi: 10.1126/science.188.4185.257. [DOI] [PubMed] [Google Scholar]