Physico-Chemical Parameters and Phytoplankton Community of Some Selected Fishponds in Lagos State, Nigeria

Oladipo, A. E.; Williams, Akanbi

doi:10.4314/jas.v18i1.19943

Cited by 5 publications

(3 citation statements)

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“…These factors directly influence physical, chemical and biological variables affecting water, including temperature, pH, turbidity, electrical conductivity, dissolved oxygen concentration, biological oxygen demand, suspended solids, nutrients and chlorophyll-a concentrations and plankton populations. Previous studies have documented the effects of such physical, chemical and biological variables on the structure and functioning of aquatic ecosystems (Chapman & Kimstach, 1996;Doyle & Smart, 2001;Lam & Schertzer, 1999;Ngatia et al, 2019;O'Gorman et al, 2016;Oladipo & Williams, 2003;Svobodová et al, 1993;Walker et al, 2007). Of these variables, the Secchi depth, nutrient concentrations (phosphorus and nitrogen) and chlorophyll-a concentrations can affect a lake's productivity, subsequently dictating its trophic status.…”

Section: Introductionmentioning

confidence: 99%

Water quality and ecology of Lake Kanyaboli, Kenya: Current status and historical changes

et al. 2022

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Small waterbodies are the most threatened freshwater habitats because of the large ratio between their size and the catchment they drain. The present study assessed the current and historical changes in the physical, chemical and biological variables of Lake Kanyaboli, a satellite lake on the northern shores of Lake Victoria in western Kenya. Primary and secondary data on pH, electrical conductivity (EC), dissolved oxygen (DO) concentration, temperature, Secchi depth (SD), and nitrate (NO − 3 ), nitrite (NO − 2 ), ammonium (NH + 4 ), soluble reactive phosphorus (SRP), total nitrogen (TN), and total phosphorus (TP) and chlorophyll-a (Chl-a) concentrations were utilized in the present study. The results indicated Secchi depth and chlorophyll-a were the most erratic of all the analyzed environmental variables studied, exhibiting a range of 0.69 ± 0.29-0.87 ± 0.34 m and 9.03 ± 0.81-34.97 ± 3.36 µg/L respectively. Two-way ANOVA yielded no significant interactions between sampling sites and seasons for all the variables. Except chlorophyll-a, there also were no significant differences among the sampling sites for the studied variables. Seasonality yielded significant differences for Secchi depth, dissolved oxygen and chlorophyll-a. The Carlson Trophic Index for Chl-a and SD indicated Lake Kanyaboli is currently eutrophic, while the TP concentration indicated hypereutrophic conditions. The lake, however, has fluctuated between eutrophic and hypereutrophic conditions over the past years. Although historical water quality data for the lake is scanty and infrequent, most physical and chemical variables reflected anthropogenic effects on a temporal scale. Interestingly, despite its eutrophic status, the general lake condition is still relatively good, attributable to the buffering effect from the extensive macrophytes fringing it. The present study identified nutrient loading, wetland reclamation and connectivity with the Yala River through a feeder canal as the management issues of critical concern. Accordingly continuous monitoring of the lake's water quality to detect anthropogenic effects is recommended for management intervention purposes.

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Section: Introductionmentioning

confidence: 99%

Water quality and ecology of Lake Kanyaboli, Kenya: Current status and historical changes

et al. 2022

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“…A few examples of such studies include Akinyemi et al (2007 from Awon Reservoir (Oyo), Nwankwo & Jaiyeola (2001), Onyema & Nwankwo (2009) from Lagos Lagoon Beach (Lagos), Kadiri & Opute (2003) from Ikpoba Reservoir, Adesalu & Nwankwo (2009) from Lekki lagoon (Lagos). Other examples of published works on diatoms from ponds in Nigeria include Ezra (2003) from a brackish water pond in Lagos (South-west Nigeria); and Oladipo & Williams (2003) from some fish ponds in Lagos, Nigeria (South-west Nigeria). When all the examples cited above are considered, almost 98% of all the studies are from the southern and eastern parts of Nigeria.…”

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Records of Diatoms and Physicochemical Parameters of Seasonal Ponds in Zaria- Northern Nigeria

Chia¹,

Bako²,

Alonge³

et al. 2011

West African Journal of Applied Ecology

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“…61, 8.30, and 0.33 mg C l -1 d -1 respectively. In general, high concentrations of cyanobacteria, chlorophytes, cryptophytes and diatoms are frequently associated with the more eutrophic ponds (OLADIPO and WILLIAMS, 2003;HARSHA and MALAMMANAVAR, 2004;PERETYATKO et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Diel Changes in Phytoplankton Composition and Abundance in the Surface and Sub‐Surface Strata from a Shallow Eutrophic Pond

Wilk‐Woźniak

Marshall

2009

International Review of Hydrobiology

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Representative phytoplankton assemblages were identified in a eutrophic pond over a 24 hour period. One assemblage characterized species in the surface (neuston) layer and another consisted of algae from 2, 5, and 20 cm sub-surface depths. The surface layer (0 cm) included a similar, but less diverse assemblage of species, and a lower abundance of cells per unit volume, than those at the lower depths. At each of the sub-surface depths (2-20 cm), the major phytoplankton components initially followed similar patterns of abundance in reference to the time and depth of sample collections then later differed in their abundance levels. The dominant algae were chlorophytes, cryptophytes, diatoms, and cyanobacteria. Mean concentrations of total phytoplankton, over the 24 hours for the surface, were 3.3 × 10 3 cells ml -1 , compared to 36.9 × 10 3 cells ml -1 for depths 2-20 cm. The autotrophic picoplankton abundance was recorded separately from the phytoplankton with mean concentrations of 472.9 × 10 3 cells ml -1 in the surface layer and 623.0 × 10 3 cells ml -1 for the three sub-surface depths. Photos of representative species from these surface layers are presented.

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Physico-Chemical Parameters and Phytoplankton Community of Some Selected Fishponds in Lagos State, Nigeria

Cited by 5 publications

References 0 publications

Water quality and ecology of Lake Kanyaboli, Kenya: Current status and historical changes

Water quality and ecology of Lake Kanyaboli, Kenya: Current status and historical changes

Records of Diatoms and Physicochemical Parameters of Seasonal Ponds in Zaria- Northern Nigeria

Diel Changes in Phytoplankton Composition and Abundance in the Surface and Sub‐Surface Strata from a Shallow Eutrophic Pond

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