Recent Trends in Accumulation Rate, Elemental and Isotopic Composition of Organic Matter in the Magu Bay, Lake Victoria

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dc.creatorMuzuka, Alfred N. N.
dc.creatorMachiwa, John F.
dc.creatorLugomela, C.
dc.date2016-03-23T13:42:59Z
dc.date2016-03-23T13:42:59Z
dc.date2005
dc.date.accessioned2018-04-18T11:50:23Z
dc.date.available2018-04-18T11:50:23Z
dc.descriptionStable isotope composition of organic carbon (OC), 14C data, OC and nitrogen content of recently deposited sediments in Magu Bay of Speke Gulf, Lake Victoria are used to document accumulation rates, sources and distribution of organic matter in the bay. The stable isotope values of both organic carbon and nitrogen decrease towards offshore, and this trend is associated with increase in the contents of organic carbon and nitrogen. The isotope results show that the organic material deposited in the bay are generally derived from C4 type of plants and are not transported far from the river mouth. Also the results show that preservation of organic matter is high in open water probably due to high primary productivity owing to high concentration of nutrients and low in turbidity. Low isotope values in offshore sites indicate that the available stock of nutrients far exceeds the demand. Sedimentation rates in the bay are not high and range from 5 to 54 cm/ka. This could be attributed to trapping efficiency by shoreline aquatic macrophyte. Furthermore, the mean accumulation rates of organic carbon and nitrogen for the bay, range from 6.92 to 57.25 gC/m2/yr and 0.51 to 4.37 gN/m2/yr, respectively, and show that Magu Bay is currently experiencing eutrophication.
dc.identifierMuzuka, A.N.N., Machiwa, J.F., Lugomela, C. 2005. Recent trends in Accumulation rate, elemental and isotopic composition of organic matter in the Magu Bay, Lake Victoria. Tanzania Journal of Science 31 (1) 23 - 34
dc.identifier0856 1761
dc.identifierhttp://hdl.handle.net/123456789/1293
dc.identifier10.4314/tjs.v31i1.18406
dc.identifier.urihttp://hdl.handle.net/123456789/10886
dc.languageen
dc.publisherUniversity of Dar Es Salaam
dc.subjectcomposition of organic matter
dc.subjectMagu bay
dc.subjectlake victoria
dc.subjectisotope composition
dc.titleRecent Trends in Accumulation Rate, Elemental and Isotopic Composition of Organic Matter in the Magu Bay, Lake Victoria
dc.typeJournal Article, Peer Reviewed

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