Diversity of Phytoplankton in Iragbo Part of Yewa Lagoon, Southwest, Nigeria

Abstract

Abstract:A study of the diversity of phytoplankton in Iragbo part of Yewa Lagoon Lagos was conducted for six months, (December, 2012-May, 2013. The surface water transparency was (≥48.5) and showed direct relationship with phytoplankton abundance. A total of 4875 individuals of 77 phytoplankton species belonging to 6 divisions were identified. Phytoplankton biomass was high in the dry months than wet months. Phytoplankton chlorophyll-a value (0.004) was highest in January. The Centrales diatoms dominated the phytoplankton community. A total of 1475 individuals (30.8%) represents Bacillariophyta, while 635 (13.3%), 15 (0.3%), 2525 (52.8%), 115 (2.4%) and 20(0.4%) represents Chlorophyta, Chrysophyta, Cyanophyta, Euglenophyta, and Pyrrophyta respectively. Cyanophyta were the most abundant (52.8%) while Bacillariophyta had the highest species composition of 28 making up (36.4%) of the total species. Diversity was higher in dry months (≥3.42) than wet months (≤2.99). Chlorophyll-a abundance showed positive correlation with Chemical Oxygen Demand (COD), Dissolved Oxygen (DO) and Iron (Fe).

Effects of the tide on the temporal and spatial physicochemical structure of the Kienké river estuary (South Atlantic Coast of Cameroon, Kribi) and its phytoplankton

“…The negative correlation between this first factorial axis and the elements grouped at the negative pole reflects an enrichment in organic matter and nutrient salts. This organic matter could be linked to the pollutant load due to anthropic activities on both sides of the river, which would be responsible for the acidic trend of the waters upstream (Bhat et al 2015;Kokoette & Aniefiok 2016).…”

“…(Hs), Actinastrum hantzschii (Ah), and Kirchneriella obesa (Ko)) and the Euglenophyta division (Astasia torta (At)). These are the freshwater taxa, indicative of organic pollution and likely to tolerate the enrichment in dissolved salts observable in intertidal waters such as estuaries and lagoons (Nwankwo 1996;Kokoette & Aniefiok 2016). The positive pole subgroup includes the freshwater blue and brown algae Dictyosphaerium pulchellum (Dp), Micrasterias foliacea (Mf), Mastigocladus sp.…”

The dynamics of the plankton community on Lake Siombak, a tropical tidal lake in North Sumatra, Indonesia

“…Based on several studies in coastal lakes, including the results of this study, the richness of plankton species in Lake Siombak is higher than that in the Grove Bay Lagoon (Nias, Indonesia), namely 28 genera (Hasudungan et al 2008), a coastal lagoon in Baja California (México) there are as many as 47 genera (Gracia-Escobar et al 2014), In Lake Ebony (Jakarta, Indonesia) there are 48 species (Pratiwi et al 2018a) mainly in subtropic area; for example, there are only 32 species in Kamil Abdus¸ Lagoon, Turkey (Yilmaz et al 2018). However, the richness of this species is much lower than that in Chilika Lake, India, which reaches 233-259 genera (Srichandan et al 2015;Mukherjee et al 2018), including in Yewa Lagoon which reaches 77 genera (Effiong and Inyang 2016).…”

“…Based on this diversity index, it shows that Lake Siombak is considered to have high diversity with an H ' value of 3.27. Pratiwi et al (2018a) state that it is with a very high abundance in Lake Ebony with a value of H' 1.32-2.08, including other coastal lakes in Yewa Lagoon (Nigeria) ranging from 1.09-1.95 (Effiong and Inyang, 2016). The high diversity in Lake Siombak causes the absence of dominant genera.…”

“…However, no research has been reported on the dynamics of plankton in tidal lakes in Indonesia. Meanwhile, tidal lakes abroad have been widely reported, for example, Yewa Lagoon, Nigeria (Effiong and Inyang 2016), Términos Lagoon, Mexico (Conan et al 2017), Chilika Lake, India (Srichandan et al 2015;Sahu et al 2016 ;Mukherjee et al 2018), Abduş Lagoon, Turkey (Yilmaz et al 2018), Temperate coastal lagoon in Ria de Aveiro, Portugal (Bueno-Pardo et al 2018), coastal lakes in Baltic Sea (Obolewski et al 2018 ), a coastal lagoon in northern Brazil (Cutrim et al 2019), Mediterranean lake (Mentzafou and Dimitriou 2019). Therefore, this study is the answer to the case on the characteristics of plankton dynamics in tropical tidal lakes in Indonesia.…”