Nitrogen fixation (acetylene reduction) associated with communities of heterocystous and non-heterocystous blue-green algae in mangrove forests of Sinai

Oecologia ◽  
1979 ◽  
Vol 39 (3) ◽  
pp. 359-373 ◽  
Author(s):  
M. Potts
Keyword(s):  
Nitrogen Fixation ◽  
Green Algae ◽  
Acetylene Reduction ◽  
Mangrove Forests ◽  
Blue Green Algae

scholarly journals Nitrogen Fixation in Canadian Precambrian Shield Lakes

1980 ◽  
Vol 37 (3) ◽  
pp. 494-505 ◽  
Author(s):  
Robert J. Flett ◽  
David W. Schindler ◽  
Robert D. Hamilton ◽  
Norman E. R. Campbell
Keyword(s):  
Nitrogen Fixation ◽  
Green Algae ◽  
Acetylene Reduction ◽  
Low Oxygen ◽  
Experimental Lakes Area ◽  
Blue Green Algae ◽  
Methane Oxidizing Bacteria ◽  
Bloom Formation ◽  
Littoral Sediments ◽  
Shield Lakes

Acetylene reduction assays in the water columns of several artificially eutrophied lakes in the Experimental Lakes Area revealed that nitrogen fixation by planktonic blue-green algae could supply a significant portion of the nitrogen income to these lakes. In situ 15N2 uptake experiments in one lake indicated that nitrogen fixation was proceeding at a slow rate in the low oxygen region of the thermocline, probably via methane oxidizing bacteria. Other 15N2 uptake experiments in the littoral sediments of an oligotrophic lake failed to detect nitrogen fixation. Generally, algal nitrogen fixation occurred in Shield lakes that were subject to total N:total P loading ratios (wt/wt) of less than approximately 10. This suggests that in these lakes phosphorus removal from loading is the best technique for eutrophication abatement and that nitrogen removal, when applied by itself, may be detrimental because it could encourage bloom formation of nitrogen fixing blue-green algae.Key words: nitrogen fixation, eutrophication, blue-green algae, acetylene reduction, nitrogen-15

scholarly journals Studies on Nitrogen Fixation by Blue-Green Algae

1942 ◽  
Vol 19 (1) ◽  
pp. 78-87
Author(s):  
G. E. FOGG
Keyword(s):  
Nitrogen Fixation ◽  
Green Algae ◽  
Anabaena Cylindrica ◽  
Fixed Nitrogen ◽  
Blue Green Algae ◽  
Combined Nitrogen

1. Anabaena cylindrica Lemin. has been obtained in pure unialgal bacteria-free culture. 2. Due precautions having been taken against contamination by other organisms and error due to absorption of fixed nitrogen from the atmosphere, this alga has been shown to possess the capacity of fixing nitrogen. 3. Nitrogen fixation does not take place in the presence of a sufficient quantity of readily available combined nitrogen.

Is the Heterocyst the Site of Nitrogen Fixation in Blue-green Algae?

Nature ◽  
1968 ◽  
Vol 220 (5169) ◽  
pp. 810-812 ◽  
Author(s):  
P. FAY ◽  
W. D. P. STEWART ◽  
A. E. WALSBY ◽  
G. E. FOGG
Keyword(s):  
Nitrogen Fixation ◽  
Green Algae ◽  
Blue Green Algae

Physiological and biochemical studies on nitrogen fixation by blue-green algae

1963 ◽  
Vol 44 (4) ◽  
pp. 356-365 ◽  
Author(s):  
Ezz Eldin M. Taha ◽  
Abdel Monem H. Refai
Keyword(s):  
Nitrogen Fixation ◽  
Green Algae ◽  
Blue Green Algae ◽  
Biochemical Studies ◽  
Physiological And Biochemical
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