Nitrogenase Activity in Intertidal Sediment Along the Tanzanian Coast, Western Indian Ocean

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dc.contributor.authorLyimo, Thomas J.
dc.contributor.authorLugomela, Charles
dc.date.accessioned2016-06-19T21:27:23Z
dc.date.available2016-06-19T21:27:23Z
dc.date.issued2006
dc.description.abstractNitrogenase activity was determined using the acetylene reduction assay in the littoral areas near Tanga, Dar es Salaam and Mafia with the aim of investigating its spatial and temporal distribution along the Tanzanian coastal line. Ethylene (C2H4) production rates ranged from 0.07 - 13.5 nmol C2H4 cm-2h-1 in Tanga area, 0.30 - 5.43 nmol C2H4 cm-2h-1 in Dar es Salaam and from 0.10 - 6.25 nmol C2H4 cm-2h-1 in Mafia. Significantly higher rates of nitrogenase activity were measured during night-incubated samples compared to daytime incubated samples suggesting that the sediments were mostly composed of non-heterocystous diazotrophic organisms. However, there were no significant differences in rates of nitrogenase activity between the rainy and dry season and between the sandy and muddy beaches. Also, there were no significant differences in nitrogenase activity between the upper, mid and lower littoral zones, and between the three sampling locations, i.e. Tanga, Dar es Salaam and Mafia. A nitrogen fixation rate of 38 mmol N m-2y-1 was estimated. We conclude that diazotrophs contribute a substantial amount of nitrogen input to the Tanzania coastal ecosystems.en_US
dc.identifier.citationLyimo, T.J. and Lugomela, C., 2006. Nitrogenase Activity in Intertidal Sediment Along the Tanzanian Coast, Western Indian Ocean. Western Indian Ocean Journal of Marine Science, 5(2), pp.133-140.en_US
dc.identifier.doi10.4314/wiojms.v5i2.28505
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2604
dc.language.isoenen_US
dc.subjectNitrogen fixationen_US
dc.subjectAcetylene Reduction Assayen_US
dc.subjectDiazotrophsen_US
dc.subjectIntertidal sedimenten_US
dc.subjectTanzaniaen_US
dc.titleNitrogenase Activity in Intertidal Sediment Along the Tanzanian Coast, Western Indian Oceanen_US
dc.typeJournal Article, Peer Revieweden_US
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