Cyanobacterial Diversity and Nitrogen Fixation in Coastal Areas around Zanzibar, Tanzania

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dc.contributor.authorLugomela, Charles
dc.contributor.authorBergman, Birgitta
dc.contributor.authorWaterbury, J.
dc.date.accessioned2016-06-26T17:12:47Z
dc.date.available2016-06-26T17:12:47Z
dc.date.issued2001
dc.descriptionFull text can be accessed at http://cat.inist.fr/?aModele=afficheN&cpsidt=14114230en_US
dc.description.abstractCyanobacterial diversity and nitrogen fixation were examined in coastal areas around Zanzibar, Tanzania. Samplings were performed intermittently from June 1997 to October, 1999 from plankton, intertidal and subtidal microbial mats as well as from epiphytes on seagrasses and seaweeds. A total of 21 cyanobacterial genera comprising 50 species are described, out of which 64% were filamentous non-heterocystous forms, 24% heterocystous forms and 12% unicellular forms. Non-heterocystous Oscillatoria spp. dominated the microbial mats and epiphytic habitats, and the like-wise non-heterocystous Trichodesmium spp. were the most abundant cyanobacteria in net samples. Fourteen of the species identified were analyzed for the ability to fix dinitrogen using the acetylene reduction assay and eleven species showed nitrogenase activity. Six of these species were also subjected to immuno-blotting. The presence of a nitrogenase (Fe-protein) protein with an average molecular weight of 36 kDa was detected. The results suggest higher cyanobacterial diversity in the area investigated than previously reported and indicate that the capacity to fix molecular nitrogen is present in a number of species that are often prominent in these habitats. It is therefore concluded that cyanobacteria may have an important role and may contribute to new N-production in coastal areas of Tanzania.en_US
dc.identifier.citationLugomela, C., Bergman, B. and Waterbury, J., 2001. Cyanobacterial diversity and nitrogen fixation in coastal areas around Zanzibar, Tanzania. Archiv für Hydrobiologie. Supplementband, Algological studies, 140, pp.95-115.en_US
dc.identifier.issn0342-1120
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2714
dc.language.isoenen_US
dc.publisherSchweizerbarten_US
dc.subjectEnzymatic activityen_US
dc.subjectAfricaen_US
dc.subjectTanzaniaen_US
dc.subjectBacteriaen_US
dc.subjectEnzymeen_US
dc.subjectOxidoreductasesen_US
dc.subjectSpecific identificationen_US
dc.subjectIndian Oceanen_US
dc.subjectZanzibaren_US
dc.subjectCyanobacteriaen_US
dc.subjectNitrogenaseen_US
dc.subjectEcological abundanceen_US
dc.subjectEpiphyteen_US
dc.subjectMicrobial maten_US
dc.subjectHabitaten_US
dc.subjectCoastal zoneen_US
dc.subjectPlanktonen_US
dc.subjectBiodiversityen_US
dc.subjectNitrogen fixationen_US
dc.titleCyanobacterial Diversity and Nitrogen Fixation in Coastal Areas around Zanzibar, Tanzaniaen_US
dc.typeJournal Articleen_US
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