Benthic macroinvertebrate community and chlorophyll a (chl-a) concentration in sediment of three polluted sites in the Lagos Lagoon, Nigeria

Uwadiae, RE

doi:10.4314/jasem.v20i4.31

Cited by 5 publications

(8 citation statements)

References 13 publications

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“…These species respond to organic pollution by increasing their abundance and their prevalence in Group IV supports this fact. They can live in extremely polluted waters with very low oxygen levels (Uwadiae, 2016 ).…”

Section: Discussionmentioning

confidence: 99%

Influence of environmental variables on macroinvertebrate community structure in Lianhuan Lake

Dou

Yu³

et al. 2022

Ecology and Evolution

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Section: Discussionmentioning

confidence: 99%

Influence of environmental variables on macroinvertebrate community structure in Lianhuan Lake

Dou

Yu³

et al. 2022

Ecology and Evolution

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“…Being grouped in Group IV is an attestation to this fact. They can live in extremely polluted waters with very low oxygen levels (Uwadiae, 2016).…”

Section: Discussionmentioning

confidence: 99%

Influence of environmental variables on macroinvertebrate community structure in Lianhuan Lake

Dou

Yu³

et al. 2021

Preprint

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The characteristics of macroinvertebrate community structure can effectively reflect the health status of lake ecosystem and the quality of the lake ecological environment. It is of great significance to identify the limiting factors of macroinvertebrate community structure for the maintenance of lake ecosystem health. In this study, the community composition of macroinvertebrate assemblages and their relationships with environmental variables in 13 small lakes within Linhuan Lake was investigated. Self-organizing map, K-means clustering analysis, principal component analysis, pearson correlation analysis, and redundancy analysis were used to analyze the correlation and variability between macroinvertebrates community index and environmental factors. The results showed that the environmental variables (pH, total phosphorus, nitrate, water temperature, dissolved oxygen, conductivity, chemical oxygen demand, and ammonium) had a significant effect on the classification of macroinvertebrate community. Molluscs were significantly negatively correlated with pH and chlorophyll a, while annelids and aquatic insects were significantly positively correlated with chlorophyll a and dissolved oxygen. Species richness and Shannon’s diversity of macroinvertebrates were significantly negatively correlated with total phosphorus while biomass of macroinvertebrates was significantly negatively correlated with pH. High alkalinity characteristics and eutrophication of the lake have a serious impact on the macroinvertebrate community. Human interference and unreasonable industrial and surface runoff from agricultural farms destroy the ecological environment and affect the community structure of macroinvertebrate. Thus, the improvement of the macroinvertebrate’s community structure should be carried out by improving the Lianhuan Lake watershed ecological environment and controlling watershed environmental pollution.

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“…Station 2 was located at the Iddo (6 o 47′36′′N and 3 o 27′29′′E) area of the lagoon, which is a sewage dump site. Station 3 was at the Tin Can Island Port slightly adjacent the Lagos Harbour (6 o 52′19′′N and 3 o 43′41′′E), pollutants here include oil and related products from shipping and associated human activities (Uwadiae, 2016).…”

Section: Study Locationmentioning

confidence: 99%

“…Most academic literature reports on the Lagos Lagoon system centre on the rising concentration of pollutants and the degraded ecological health of the lagoon. These reports (including Ajao and Fagade, 1991;Brown and Oyenekan, 1998;Uwadiae, 2014;2016; relied majorly on chemical measurements in drawing inferences about the environmental status of the lagoon. This, to most ecologists does not present the full picture of environmental conditions especially as it relates to pollution conditions of the lagoon.…”

Section: Introductionmentioning

confidence: 99%

Stochastic evaluation of benthic biocoenosis as pollution assessment tool in a perturbed aquatic ecosystem

Uwadie¹,

Ajose²

2021

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To analyse the extent of disturbances and determine the state of health of aquatic systems, the integration of several biological effects at different levels of biological organization has been used. One of the most valuable methods of biological effect measurements is the use of ecological surveys at community and population levels. In this study, the distributional evaluation of benthic biocoenosis was undertaken to determine site-specific differences in community assemblage in relation to environmental status of the study sites. Three study locations (Okobaba, Iddo and Tin Can Island) in the western side of the Lagos Lagoon with highest concentrations of human activities were selected. These sites represent areas directly affected by major anthropogenic discharge into the Lagos Lagoon. Samples were collected for six consecutive months (March and August 2014). There was great variation in parameters investigated among the study sites. The concentrations of dissolved oxygen in surface water varied from 3.0- 4.5 mg/L. Chlorophyll a in surface water fluctuated from 0.12- 2.01 mg/L whereas, in sediment values varied from 0.14-1.32 mg/g. Biomass of microphytobenthos (MPB) varied from 1.4-13.2 g. Of the total 841 MPB cells collected the highest population was recorded in Okobaba. Twelve MPB taxa were recorded in the study area. The most important species in terms of numerical abundance was Oscillatoria sp. This organism occurred in all the study stations and recorded a total of 113 cells in the study stretch. A major feature of the population distribution of the MPB taxa in this study is the occurrence of higher number of cells at Okobaba. The number of individuals and the distribution of BMF taxa varied greatly from one study location to another. Of the total 801 individuals collected, 398 were recorded at Okobaba, 316 occurred at Tin Can Island and 18 at Iddo. Unlike the case of MPB organisms, a fewer number of BMF taxa were recorded in the study area. The most important MBF taxon in terms of numerical abundance was Pachymelania aurita. This organism occurred in all the study sites and recorded a total of 162 individuals thereby constituting 20% of the total MBF population collected. The benthic community observed in this study was characterized by low number of individuals and the species of MPB and MBF recorded are known opportunistic species common in stressed environments.

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Benthic macroinvertebrate community and chlorophyll a (chl-a) concentration in sediment of three polluted sites in the Lagos Lagoon, Nigeria

Cited by 5 publications

References 13 publications

Influence of environmental variables on macroinvertebrate community structure in Lianhuan Lake

Influence of environmental variables on macroinvertebrate community structure in Lianhuan Lake

Influence of environmental variables on macroinvertebrate community structure in Lianhuan Lake

Stochastic evaluation of benthic biocoenosis as pollution assessment tool in a perturbed aquatic ecosystem

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