Spatial and temporal variations of trophic state conditions of Lake Bunyonyi, south‑western Uganda

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dc.contributor.authorAlex, Saturday
dc.contributor.authorThomas, J. Lyimo
dc.contributor.authorJohn, Machiwa
dc.contributor.authorSiajali, Pamba
dc.date.accessioned2022-11-24T13:26:23Z
dc.date.available2022-11-24T13:26:23Z
dc.date.issued2022
dc.description.abstractThe study was conducted to assess the spatial and temporal variations of the trophic state condition of Lake Bunyonyi between October 2019 and September 2020. Secchi depth (SD), total phosphorus (TP) and chlorophyll-a (Chl-a) concentration were measured to aid the quantification of trophic state condition of the lake using Carlson trophic state index (CTSI). The trophic state index (TSI) values based on SD, TP and Chl-a values were 60.82 ± 5.35, 68.99 ± 11.04 and 61.74 ± 7.51, respectively. March 2020 recorded the highest mean CSTI value (70.14 ± 4.04), while in September 2020, the lowest mean value (58.03 ± 6.22) was obtained. Based on CTSI values, the lake was eutrophic in both dry and wet seasons albeit with differences in the values. The eutrophic state of the lake is possibly attributed to nutrients inflow into the lake via runoff and drainage from farmlands. The negative value of TSI-Chl-a–TSI-TP deviation pointed out that the lake is not phosphorus limited, while the positive TSI-Chl-a–TSI-SD mean deviation value revealed the effect of Chl-a and TP on the lake’s transparency. The study recommends the necessity to develop guidelines for the trophic status monitoring of Lake Bunyonyi since results suggest the deteriorating lake condition.en_US
dc.description.sponsorshipKabale Universityen_US
dc.identifier.urihttps://doi.org/10.1007/s13201-022-01816-y
dc.identifier.urihttp://hdl.handle.net/20.500.12493/748
dc.language.isoen_USen_US
dc.publisherSpringeren_US
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/us/*
dc.subjectWater quality · Trophic state index · Secchi depth transparency · Lake Bunyonyien_US
dc.titleSpatial and temporal variations of trophic state conditions of Lake Bunyonyi, south‑western Ugandaen_US
dc.typeArticleen_US

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