Prof. John F. Machiwa

Publications in Refereed Journals

\r\n\r\n1. Machiwa, J.F. 1992. Trace metals in coastal sediments off Dar es Salaam, \r\nTanzania Environment International, 18: 409-415

\r\n\r\n2. Machiwa, J.F., Mgaya, Y.D. and Ndaro, S.G.M. 1992. A preliminary \r\nconsideration of the role of Mangroves in nutrient and organic fluxes in the Rufiji delta system, Tanzania. East African Journal of Science (Biological series) 1: 15-27

\r\n\r\n3. Machiwa, J.F. 1992. Anthropogenic pollution in the Dar es Salaam harbour area, Tanzania. Marine Pollution Bulletin, 24: 562-567

\r\n\r\n4. Machiwa, J.F. and Hallberg, R.O. 1995. Flora and crabs in a mangrove forest \r\npartly distorted by human activities, Zanzibar. Ambio 24: 492-496

\r\n\r\n5. Machiwa, J.F. 1998. Distribution and remineralization of organic carbon in \r\nsediments of a mangrove stand partly contaminated with sewage waste. Ambio 27: 740-744

\r\n\r\n6. Machiwa, J.F. 1999. Lateral fluxes of organic carbon in a mangrove forest partly \r\ncontaminated with sewage waste. Mangroves and Salt marshes 3: 95-104.

\r\n\r\n7. Machiwa, J.F. 2000. Heavy metals and organic pollutants in sediments of Dar es \r\nSalaam harbour prior to dredging in 1999. Tanzania Journal of Science 26: 29-45

\r\n\r\n8. Machiwa, J.F. 2000. 13C signatures of flora, macrofauna and sediment of a \r\nmangrove forest partly affected by sewage wastes. Tanzania Journal of Science 26: 15-27

\r\n\r\n9. Machiwa , J.F. and Hallberg, R.O. 2002. An empirical model of the fate of \r\norganic carbon in a mangrove forest partly affected by anthropogenic activity Ecological Modelling 147: 69-83

\r\n\r\n10. Kishe, M.A. and Machiwa, J.F. 2003. Distribution of heavy metals in \r\nsediments of Mwanza Gulf of Lake Victoria, Tanzania. Environment International 28: 619-625 \r\n

\r\n11. Mremi, S.D. and Machiwa, J.F. 2003. Heavy metal contamination of mangrove \r\nsediments and the associated biota in Dar es Salaam, Tanzania. Tanzania Journal of Science 29 (No 1): 61-76 \r\n

\r\n12. Machiwa, J.F. 2003. Metal concentrations in sediment and fish of Lake Victoria \r\nnear and away from catchments with gold mining activities. Tanzania Journal of Science 29 (No.2): 43-54 \r\n

\r\n13. Machiwa, J.F. 2003. Concentrations of metals in river sediment and wetland \r\nvegetation in mining sites, Lake Victoria basin, Tanzania. Tanzania Journal of Science 29(No.2): 81-88 \r\n

\r\n14. Machiwa, J.F., Lugomela, C., Muzuka. A.N.N. 2004. Phytoplankton and \r\nnutrients studies in Magu Bay, Speke Gulf, Lake Victoria, (Tanzania), following the 2001 principal rain season. Tanzania Journal of Science 30 (1): 33 - 42 \r\n

\r\n15. Machiwa, J.F. 2004. Total mercury concentration in common fish species of \r\nLake Victoria, Tanzania. Tanzania Journal of Science 30 (2): 11 - 20 \r\n

\r\n16. Ngoye, E. and Machiwa, J.F. 2004. The influence of land-use patterns in the Ruvu River watershed on water quality in the river system. Physics and Chemistry of the Earth 29: 1161-1166

\r\n\r\n17. Taylor, H, Appleton, J.D, Lister, R., Smith, B., Chitamweba, D., Mkumbo, O., \r\nMachiwa, J.F., Tesha, A.L. and Beinhoff, C. 2005. Environmental assessment of mercury contamination from the Rwamagasa artisanal gold mining centre, Geita District, Tanzania. Science of the Total Environment 343: 111-133

\r\n\r\n18. Machiwa J.F. 2005. Metals in Nile perch (Lates niloticus) and Suspended \r\nParticulateMatter from Lake Victoria, Tanzania. Journal of Environmental Science and Health Part A 40 (9): 1809 - 1822

\r\n\r\n19. Muzuka, A.N.N., Machiwa, J.F., Lugomela, C. 2005. Recent trends in \r\nAccumulation rate, elemental and isotopic composition of organic matter in the Magu Bay, Lake Victoria. Tanzania Journal of Science 31 (1) 23 - 34

\r\n\r\n20. Mtanga A. and Machiwa J.F. 2007. Heavy metal pollution levels in water \r\nand oysters, Saccostrea cucullata, from Mzinga Creek and Ras Dege mangrove ecosystems, Tanzania. African Journal of Aquatic Science 32 (3): 235 - 244

\r\n\r\n21. Mtanga, A. and Machiwa, J.F. 2007. Assessment of heavy metal pollution in \r\nsediment and polychaete worms from the Mzinga Creek and Ras Dege mangrove ecosystems, Dar es Salaam, Tanzania. Western Indian Ocean J. Mar. Sci. 6(2) 125 - 135

\r\n\r\n22. Ideva, RJ., Machiwa, J. Schiemer F and Hein, T. 2008. Effect of an \r\nimpoundment on nutrient dynamics in the Kihansi River, Tanzania. African J. \r\nAquatic Sci. 33: 181-188

\r\n\r\n23. Gaspare L., Machiwa, J.F., Mdachi, SJ.M., Streck, G. and Brack, W. 2009 \r\nPolycyclic aromatic hydrocarbons (PAH) contamination of surface sediments and \r\noysters from the intertidal areas of Dar es Salaam, Tanzania. Environmental \r\nPollution 157: 24-34

\r\n\r\n24. Machiwa, J.F. 2010 Nature of suspended particulate matter and concentration of \r\nHeavy metals in sediment in the southern part of Lake Victoria, East Africa. African Journal of Aquatic Science 35(1): 95-101.

\r\n\r\n25. Machiwa, J.F. 2010 Stable carbon and nitrogen isotopic signatures of organic \r\nmatter sources in the southern part of Lake Victoria. Journal of Great Lakes Research 36: 1 - 8.

\r\n\r\n26. Machiwa, J.F. 2010 Heavy metal levels in paddy soils and rice (Oryza sativa (L)) \r\nfrom wetlands of Lake Victoria Basin, Tanzania.. Tanzania Journal of Science 36: 59-72

.\r\n\r\n27. Machiwa, J.F. 2010 Coastal marine pollution in Dar es Salaam (TANZANIA) relative to recommended environmental quality targets for the Western Indian Ocean. WIO Journal of Marine Science 9: 303 - 312

\r\n\r\n28. Shayo S.D., Lugomela C., Machiwa J.F. 2011. Influence of land use patterns on \r\nSome limnological characteristics in the south-eastern part of Lake Victoria, \r\nTanzania Aquatic Ecosystems Health and Management 14:3, 246 - 251

\r\n\r\n29. Mangion P., Macia A., Rosario A., Mwangi S., Machiwa J.F, Kristensen E., \r\nFrank Dehairs F. Tracing the fate and pathways of sewage-derived carbon and nitrogen in mangrove ecosystems: consequences for epibenthic communities (Submitted, Marine Ecology Progress Series)

\r\n\r\n30. Morrison R.J., Zhang J., Urban Jr. E.R., Hall J., Ittekkot V., Avril B., Hu L., Hong G.H.,Kidwai S., Lange C.B., Lobanov V., Machiwa J., San Diego-McGlone M.L., Oguz T, Plumley F.G.,Yeemin T., Zhu W. and Zuo F. 2013. Developing human capital for successful implementation of international marine scientific research projects Marine Pollution Bulletin 77: 11-22.

\r\n\r\n31. Sekadende BC, Machiwa JF and Mwanuzi FF 2014. Processes Governing the Retention of Phosphorus and Nitrogen in Nyashishi Wetland. Open Journal of Ecology 4: 124-134

\r\n\r\n\r\nChapters in Books

\r\n\r\n1. Machiwa J, Rutagemwa D, Rwetabula J, Myanza O, Mnyanga V, Lupeja P. and \r\nMwanuzi F. Pesticides and Metal Contamination. In: Lake Victoria Water Quality and Management, Chap. 10. (In press)\r\n
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