Employing multivariate analysis to determine the drivers of productivity on the North Kenya Bank and in Kenyan territorial waters

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dc.contributor.authorKamau, J.
dc.contributor.authorOchala, O.
dc.contributor.authorOhowa, B.
dc.contributor.authorMitto, C.
dc.contributor.authorMagori, C.
dc.contributor.authorOsore, M.
dc.contributor.authorMahongo, S.B.
dc.contributor.authorKyewalyanga, M.S.
dc.date.accessioned2021-03-29T13:56:40Z
dc.date.available2021-03-29T13:56:40Z
dc.date.issued2020
dc.description.abstractA complex mix of natural processes exist in nearshore and offshore waters which influence coastal and marine ecosystem productivity. An understanding of the biogeochemical processes involved is a key element in interdis ciplinary studies of primary production, oceanic flux and storage of carbon dioxide. Water circulation in the East African region is influenced by coastal currents driven by monsoon winds. There are four oceanic currents influenc ing Kenya’s coastal waters; namely the East African Coastal Current, the Somali Current, the Southern Equatorial Current and the Equatorial Counter Current. The Kenyan fishing industry is slowly embracing offshore fishing grounds, and the North Kenya Bank is emerging as the next fishery frontier. This study aims to provide insight on the processes driving the productivity of Kenya’s territorial waters. The variable Si* (the difference between available silicate [Si(OH)4] and nitrate [NO3- ]) was employed as a proxy of upwelling. It was highly positively correlated to chlorophyll-a, indicating that upwelling is a major phenomenon driving productivity in Kenyan territorial waters. Particulate Organic Carbon (POC) and Dissolved Oxygen (DO) exhibited a lesser positive correlation with chloro phyll-a, implying that remineralization also has some influence in the productivity of the area.en_US
dc.description.sponsorshipKenya Marine and Fisheries Research Institute (KMFRI) through access to its RV Mtafiti platform as well as associated analytical infrastructure and the Western Indian Ocean Marine Science Association (WIOMSA) through its MASMA Grant.en_US
dc.identifier.citationKamau, J., Ochala, O., Ohowa, B., Mitto, C., Magori, C., Labatt, C., Osore, M., Mahongo, S.B. and Kyewalyanga, M.S. 2020. Employing multivariate analysis to determine the drivers of productivity on the North Kenya Bank and in Kenyan territorial waters. Western Indian Ocean Journal of Marine Science. Special Issue 1/ 2020, 33-41.en_US
dc.identifier.doihttp://dx.doi.org/10.4314/wiojms.si2020.1.4
dc.identifier.urihttp://hdl.handle.net/20.500.11810/5563
dc.language.isoenen_US
dc.publisherWIOMSAen_US
dc.subjectNitrate, Silicate, Productivity, Kenya, North Kenya Banken_US
dc.titleEmploying multivariate analysis to determine the drivers of productivity on the North Kenya Bank and in Kenyan territorial watersen_US
dc.typeJournal Articleen_US
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