Assessment of water quality in the lower Nyong estuary (Cameroon, Atlantic Coast) from environmental variables and phytoplankton communities composition | Zendy

Crepin Mama Anselme | Zendy; Flodore Youbouni Ghepdeu Gisele | Zendy; Rémi Ngoupayou Ndam Jules | Zendy; Desire Bonga Manfred | Zendy; Mammert Onana Fils | Zendy; Raphaël Onguéné | Zendy

Open Access

Assessment of water quality in the lower Nyong estuary (Cameroon, Atlantic Coast) from environmental variables and phytoplankton communities composition

Author(s) -

Crepin Mama Anselme,

Flodore Youbouni Ghepdeu Gisele,

Rémi Ngoupayou Ndam Jules,

Desire Bonga Manfred,

Mammert Onana Fils,

Raphaël Onguéné

Publication year - 2018

Publication title -

african journal of environmental science and technology

Language(s) - English

Resource type - Journals

ISSN - 1996-0786

DOI - 10.5897/ajest2017.2454

Subject(s) - phytoplankton , estuary , wet season , dry season , water quality , environmental science , species richness , diversity index , abundance (ecology) , oceanography , nutrient , ecology , seasonality , fishery , biology , geology

The aim of this study was to provide a first-hand water quality assessment of the River Nyong estuary, Southern Atlantic coast of Cameroon. Environmental variables and phytoplankton communities were monitored at four surface stations in the estuary for 2 season cycles from 2014 to 2015. A total of 208 species of phytoplankton, belonging to five (5) groups of microalgae, were identified. The Shannon-Weaver diversity index showed a qualitative seasonal difference in composition of the phytoplankton community. Dissolved nutrients (nitrogen and phosphorus) values showed seasonal fluctuations throughout the sampling period. A ratio appeared high (42.78) in the rainy season and low (5.89) in the dry season, two values corresponding to the change in specific richness (high and low respectively during the major rainy season and the small dry season). The Water Quality Index (WQI) showed that water quality fluctuates from good to bad, in conjunction with biological indicators (Shannon-Weaver, Abundance and Specific richness). Key words: Quality assessment, Nyong estuary, environmental variables, phytoplankton, water quality index.

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