Nutrients’ distribution and their impact on Pangani River Basin’s ecosystem – Tanzania

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dc.contributor.author Selemani, J. R.
dc.contributor.author Zhang, J.
dc.contributor.author Muzuka, A.N.N.
dc.contributor.author Njau, Karoli N.
dc.contributor.author Zhang, G.
dc.contributor.author zuza, M. K.
dc.contributor.author Maggid, A.
dc.date.accessioned 2019-07-22T11:44:24Z
dc.date.available 2019-07-22T11:44:24Z
dc.date.issued 2017-05-05
dc.identifier.uri http://dx.doi.org/10.1080/09593330.2017.1310305
dc.identifier.uri https://dspace.nm-aist.ac.tz/handle/20.500.12479/365
dc.description Research Articles published by Taylor & Francis Group en_US
dc.description.abstract Surface and groundwater from Pangani River Basin (PRB) were sampled in dry and wet seasons, analysed for dissolved organic and inorganic nutrients (N, P, Si and Urea). There was spatial and seasonal nutrients’ variability, with enrichment of dissolved inorganic fractions accumulated from natural and anthropogenic sources. Silicates increased in dry season, whereas nitrate, ammonium, phosphate and urea increased in wet season; except for phosphate, other nutrients increased from upstream to the river mouth. High rate of chemical weathering possibly due to tropical climate and volcanic rocks has caused PRB to have higher concentration of silicates than average freshwater African Rivers. Contribution of PRB to the coast of Indian Ocean was 2.6, 39.0, 45.2, 67.4 and 5444.8 (mol/km2/yr) for nitrite, phosphate, ammonium, nitrate and silicates, respectively, which were lower than most of the tropical rivers in the world. Levels of nitrate and phosphate for most of the stations were higher than recommended levels for aquatic ecosystem health. Furthermore, observed hypoxia condition in some stations threatens aquatic life. This study recommends the efficient use of fertilizers to reduce nutrients’ uptake into the lakes and rivers so as to meet the recommended level for aquatic and human health. en_US
dc.language.iso en_US en_US
dc.publisher Taylor & Francis Group en_US
dc.subject ecosystem health en_US
dc.subject human health en_US
dc.subject river basin en_US
dc.title Nutrients’ distribution and their impact on Pangani River Basin’s ecosystem – Tanzania en_US
dc.type Article en_US

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