Influence of the Mekin hydroelectric dam on the distribution of benthic macroinvertebrates of the Dja stream: South Cameroon region

This work was conducted with the aim of studying the biodiversity of benthic macroinvertebrates in the Dja River and determining the effect of the Mekin hydroelectric dam on their population in relation to the physico-chemical quality of the water. The study ran from May to October 2020 and samplings were carried out on a monthly basis in four different sampling stations located upstream and downstream of the dam. The physico-chemical analyses were done according to standard methods, while the benthic macrofauna was collected using a turbid net of 400 µm mesh size over a total area of about 6 m2 per station. Physico-chemical analyses revealed a decreasing evolution from upstream to downstream of the dam of nitrogen forms (NO3- (1.67mg/L-0.41mg/L); NH4+ (0.31 mg/L-0.21 mg/L) with p>0.05); Electrical Conductivity (21.45µS/Cm-17.1µS/Cm with p<0.05) and Suspended Solids (11.10mg/L-6.57mg/L with p<0.05); while Dissolved Oxygen (49.82%-78.23% with p<0.05) and velocity (0.04m/s-0.23m/s) increased. Organic Pollution Index revealed that the water was moderately polluted (3-4). In total, 1894 individuals, of which 1044 belonging to 2 phyla, 2 classes, 6 orders, 27 families and 47 genera/species were collected upstream; and 850 belonging to 3 phyla, 4 classes, 8 orders, 28 families and 45 genera/species were collected downstream. Odonata was largely abundant and highly represented Trithemis dorsalis (96.05%); while downstream, Heteroptera was largely abundant and highly represented by Poissonia sp1. (79.78%). These results revealed that restoration of the upstream of the dam impacted by organic pollution and physical degradation of the environment is recommended.

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Planktonic algae as bioindicators of water quality in Pagbanganan River, Baybay City, Leyte

Annals of Tropical Research ◽

10.32945/atr4224.2020 ◽

2020 ◽

pp. 43-51

Author(s):

Eunice Kenee Seriño ◽

Beatriz Belonias

Keyword(s):

Water Quality ◽

Pollution Index ◽

Mesh Size ◽

Organic Pollution ◽

Natural Ecosystems ◽

Planktonic Algae ◽

Pollution Indicator ◽

Effective Conservation ◽

Made In

Biological monitoring is a valuable method used in conservation studies to protect and preserve the biological integrity of natural ecosystems. This study was conducted to assess the water quality of the Pagbanganan River using planktonic algae as bioindicators of organic pollution. Horizontal tows were made in three selected stations (upstream, midstream & downstream) using a Wisconsin plankton net with 80pm mesh size. Collected samples were preserved with Lugol’s solution and 70% ethyl alcohol. Identified phytoplankton genera were analyzed using Palmer’s Pollution Index. Out of the 20 pollution indicator genera identified by Palmer (1969), 10 were present in Pagbanganan River, namely; Ankistrodesmus, Closterium, Cyclotella, Gomphonema, Melosira, Navicula, Nitzschia, Oscillatoria, Stigeoclonium and Synedra. Four of these were among the most abundant algae in the river. Mean Palmer’s Pollution Index Scores indicate that there is “less” organic pollution existing in the river. Results imply that the river is still relatively safe for general household use, but effective conservation measures should be done to preserve the integrity of the river ecosystem.

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Water Quality of Melamchi River of Sindhupalchok District, Central Nepal

Journal of Natural History Museum ◽

10.3126/jnhm.v29i0.19034 ◽

2018 ◽

Vol 29 ◽

pp. 9-18

Author(s):

Abhr R Mishra ◽

Ranjana Gupta

Keyword(s):

River Water ◽

Chemical Characteristic ◽

Monthly Basis ◽

Central Nepal ◽

Physico Chemical ◽

Calcium Magnesium ◽

Domestic Use ◽

High Level ◽

The Impact

The present study was carried out to estimate the physico-chemical characteristic of Melamchi River from January 2011 to December 2013 with a view to assess the nature and degree of pollution. Melamchi River is a snowmelt and rain fed river. River water is mainly used for drinking and irrigation. Water samples were collected on monthly basis from five sites of river. Parameters analyzed include temperature, electrical conductivity, turbidity, pH, hardness, alkalinity, dissolved oxygen, calcium, magnesium, chloride, phosphate, and nitrate. The study revealed seasonal fluctuations of the factors. River water was well oxygenated and alkaline in nature. High level for turbidity (43.25/ NTU) was observed during monsoon, which exceeded compliance levels of WHO (2011) tolerance limits (5/ NTU) for domestic use. Water contained more TDS and EC indicating the impact of agriculture and deforestation near the river area. The analyzed physico-chemical parameters were found within the permissible limit of WHO, except turbidity. Measures should be taken to regulate agricultural and deforestation activities upriver to avoid advert conditions.J. Nat. Hist. Mus. Vol. 29, 2015,, Page: 9-18

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The quality of water of the Mantovo reservoir, Republic of Macedonia

Archives of Biological Sciences ◽

10.2298/abs0903501s ◽

2009 ◽

Vol 61 (3) ◽

pp. 501-512 ◽

Cited By ~ 2

Author(s):

Valentina Slavevska-Stamenkovic ◽

T. Stafilov ◽

S. Smiljkov ◽

M. Paunovic ◽

S. Hristovski

Keyword(s):

Organic Pollution ◽

Nutrient Concentrations ◽

Chemical Parameters ◽

Limnodrilus Hoffmeisteri ◽

Quality Of Water ◽

Environmental Status ◽

Physico Chemical ◽

High Concentrations ◽

Very High

The aim of the paper is to evaluate the quality of water of the Mantovo Reservoir (Southeast Macedonia)based on physico-chemical parameters and the macrozoobenthos. Monthly sampling was performed during 2003 and 2004. Temperature and DO depth profile data indicate that the Mantovo Reservoir is a dimictic lake. Based on mean nutrient concentrations, the Mantovo Reservoir can be considered as being phosphorus-deficient. During the summer stratification, very high concentrations of Mn (2,819 ?g/l)and Cu (147.6?g/l)were detected in the lower profundal. Limnodrilus hoffmeisteri was the dominant species, which indicates the presence of organic pollution. Dominance of Chaoborus crystallinus and decline in abundance of L. hoffmeisteri in the lower profundal indicate a deterioration of environmental status in the deepest part of the lake.

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Phytoplankton as bioindicators of water quality in Nasarawa reservoir, Katsina State Nigeria

Acta Limnologica Brasiliensia ◽

10.1590/s2179-975x3319 ◽

2020 ◽

Vol 32 ◽

Author(s):

Zahraddeen Hassan Yusuf

Keyword(s):

Water Quality ◽

Pollution Index ◽

Close Relation ◽

Organic Pollution ◽

Warning Sign ◽

Wet Season ◽

Phytoplankton Monitoring ◽

The Relationship ◽

Chlamydomonas Sp

Abstract: Aim Phytoplankton monitoring as bioindicators to assess the health of the Nasarawa reservoir and also to evaluate the relationship between phytoplankton and reservoir environmental variables. Methods Phytoplankton and water samples from Nasarawa reservoir (Nigeria) were collected and analysed for ten months (February, 2018 to November, 2018) using standard methods at five sampling sites. Results A total of 38 genera belonging to five major families such as: Bacillariophyceae (42%), Chlorophyceae (24%) Cyanophyceae (13%), Deemidiaceae (18%) and Euglenophyceae (3%) were recorded. Four Phytoplankton classes; Bacillariophyta, Chlorophyta Cyanophyta, and Desmidiaceae show positive close relation with dissolved oxygen, pH, transparency, and total dissolved solids. The overall phytoplankton density in the reservoir was higher in dry season than the wet season. Palmer pollution index was employed to study the water quality of the reservoir. The total score was calculated to be 25, showing evidence of high organic pollution. Conclusions The presence of organic pollution indicators Closterium sp, Navicula sp, Nitzschia sp, Synedra sp, Chlamydomonas sp, Cyclotella sp and Anacystis sp is a warning sign of the deteriorating condition of the water quality in the reservoir. Measures need to be enforced to reduce the rate of pollution of the reservoir arising from the human activities in the catchment of the reservoir.

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Benthic community ecology for Algerian river Seybouse

Brazilian Journal of Biology ◽

10.1590/1519-6984.251566 ◽

2024 ◽

Vol 84 ◽

Author(s):

A. Baaloudj ◽

P. R. De los Ríos-Escalante ◽

C. Esse

Keyword(s):

Benthic Macroinvertebrates ◽

Biological Indicators ◽

Organic Pollution ◽

Developed Countries ◽

Pollution Indices ◽

Health State ◽

North African ◽

Ecosystem Integrity ◽

Physico Chemical ◽

The Impact

Abstract The Seybouse is the second largest river basin in Algeria, hosting an important biodiversity and providing various ecosystem services. This watershed is highly influenced by agricultural and industrial activities, which threaten its biodiversity and ecosystem integrity. The use of benthic macroinvertebrates as biological indicators has a long tradition in developed countries and integrated into all assessments of the ecological quality of river systems. However, the macroinvertebrates of many North African regions are still not well studied, including those of the Seybouse river. The aim of this study is to assess the inventory and ecological role of benthic macroinvertebrates in inland waters of the Seybouse River and determine the impact of pollution on their spatial distributions. We sampled the benthic macrofauna of Wadi Seybouse and its affluents using regular surveys in three sites, of which one was in the upper Seybouse Bouhamdane in Medjez Amar and two in the middle Seybouse. Between December 2019 and May 2020, 10 physico-chemical parameters (pH, EC, OD, water speed, NO3, Salinity, NO2, MES, turbidity, depth) were measured in order to establish a health state diagnosis of these aquatic ecosystems. The complementary biological approach by the analysis of populations of macroinvertebrates identified 7482 individuals and 40 taxa divided into five classes: Crustaceans which were the most dominant, insects with the main orders (Ephemeroptera, Diptera, Trichoptera, Heteroptera and Odonata), Molluscs, Nematodes and Annelids. The physico-chemical analyzes and the application of the organic pollution indices indicated a strong to excessive pollution for all sites, especially in Seybouse upstream

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Statistical assessment of seafront and beach water quality of Mumbai, India

Water Science & Technology ◽

10.2166/wst.2011.667 ◽

2011 ◽

Vol 64 (5) ◽

pp. 1186-1193 ◽

Cited By ~ 1

Author(s):

Ritesh Vijay ◽

Swapnil R. Kamble ◽

S. S. Dhage ◽

R. A. Sohony ◽

S. R. Wate

Keyword(s):

Water Quality ◽

Organic Pollution ◽

Quality Parameters ◽

Nonpoint Sources ◽

Physico Chemical ◽

Treated Sewage ◽

Central Pollution Control Board ◽

Spatio Temporal ◽

Beach Water Quality

The water quality of seafronts and beaches of Mumbai is under pressure and deteriorating due to discharge of partially treated sewage and wastewater through point and nonpoint sources. The objective of the study was to assess the water quality and to correlate physico-chemical and bacteriological parameters for establishing relationship, association and dependence on each other. The water quality parameters were selected as per SW II standards specified by Central Pollution Control Board, India and nutrient parameters as strong indicators of sewage pollution. Box and whisker plots were generated for evaluating spatio temporal variation of water quality which suggest influence of organic pollution mostly at Mahim and Dadar in the form of outliers and extremes. Pearson's correlations were estimated between parameters and found significant correlation with each other indicating influence of sewage on water quality. The water quality of beaches and seafronts were found unsafe for recreational purposes. The study suggested that designated water quality can be achieved by restricting nonpoint source through improvement in wastewater collection systems, appropriate level of treatment and proper disposal.

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Munzur Çayı (Tunceli-Türkiye)’nın Algal Florasının ve Su Kalitesi Değişimi

Turkish Journal of Agriculture - Food Science and Technology ◽

10.24925/turjaf.v6i8.985-994.1823 ◽

2018 ◽

Vol 6 (8) ◽

pp. 985

Author(s):

Banu Kutlu ◽

Burcu Demir

Keyword(s):

Water Quality ◽

Organic Pollution ◽

Chemical Parameters ◽

Domestic Waste ◽

Nitzschia Palea ◽

Phytoplankton Distribution ◽

Quality Regulation ◽

Quality Of Water ◽

Physico Chemical

Phytoplankton distribution and physico-chemical parameters in two stations in Munzur River were determined in the study carried out monthly between February 2015 and January 2016. According to water quality regulation of the supreme, while quality of water is first class property for temperature, pH, oxygen, ammonium nitrate. It is class feature. Also II. The station is in danger of organic pollution due to domestic waste. When the phytoplankton distribution in the region is examined; 84 taxa belonging phytoplankton Chlorophyta (6), Bacillariophyta (54), Cyanobacteria (15), Rhodophyta (1), Ochrophyta (1), Euglenophyta (2), Charophyta (3), Miozoa (2) were detected. In terms of organisms in the phytoplankton Bacillariophyta division was dominant and Cyanobacteria division was subdominant in the two stations. In the phytoplankton, Ulnaria ulna from Bacillariophyta, Nitzschia palea, Bacillaria paradoxa ,Encyonema sp., Navicula sp. and Nitzschia acicularis were mostly found. Lyngbya sp., Spirulina labyrinthiformis, Oscillatoria labyrinthiformis and Oscillatoria mougeotii species beloning to cyanobacteria match to second place in the terms of importance. Chlorophyta, Charophyta and Euglenophyta have not reached important numbers.

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Benthic macroinvertebrates diversity as bioindicators of water quality of Nasarawa Reservoir Katsina State Nigeria

Bayero Journal of Pure and Applied Sciences ◽

10.4314/bajopas.v12i1.68s ◽

2020 ◽

Vol 12 (1) ◽

pp. 449-456

Author(s):

Zahraddeen Hassan Yusuf

Keyword(s):

Water Quality ◽

Benthic Macroinvertebrates ◽

Working Party ◽

Dry Season ◽

Wet Season ◽

Quality Of Water ◽

Physico Chemical ◽

Invertebrate Population ◽

Number Of Individuals

This study was carried out to assess the water quality of Nasarawa using benthic macroinvertebrates as bioindicators. Biological monitoring working party (BMWP) scoring system was the index used to assess the ecosystem health of Nasarawa reservoir. A total of 4460 macrobenthic invertebrate comprising three phyla, three classes, six families and seventeen species were recorded. The overall macrobenthic population at the different stations revealed that the study area was dominated by Mollusca (41.18%), Oligochaetae (23.53%), Coleoptera and Diptera (11.77%), Mollusca (29.06%), Ephemerophtera and Odonata (5.89%). (BMWP) score of 65.7 was obtained for Nasarawa reservoir which classifies the reservoir as moderately polluted. Higher BMWP score of 65.7 was recorded in the wet season compared to the dry season value of 58.7. More macrobenthic invertebrate population was recorded in the dry season than in the wet season in Nasarawa reservoir. Simpson (1-D), Shannon (H) and evenness were higher during the dry season than in the wet season but dominance was higher in the wet season. Species richness as revealed by the Margaleff and Menhinick index was higher during the wet season than in the dry season. The variations in taxa and number of individuals during the months of sampling was not significantly different (P>0.05). It was found that agricultural activities, washing and bathing could alter physico-chemical parameters of the stream and hence changing the abundance of macroinvertebrates as well as the quality of water. This study, therefore, recommends that the source of pollutants should be controlled and the stream regularly monitored by the relevant authorities. Keywords: Benthic macroinvertebrates, Bioindicator, Water quality, Reservoir

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Bioévaluation De La Qualité Des Eaux Du Cours D’eau Menoua En Zone Périurbaine De Dschang, Ouest Cameroun

European Scientific Journal ESJ ◽

10.19044/esj.2017.v13n27p368 ◽

2017 ◽

Vol 13 (27) ◽

pp. 368

Author(s):

Ngameni Tchamadeu Norbert ◽

Patricia Bi Asanga Fai ◽

Mpoame Mbida ◽

Kenko NKontcheu Daniel Brice

Keyword(s):

Benthic Macroinvertebrates ◽

Anthropogenic Activities ◽

Mesh Size ◽

Reference Station ◽

Agricultural Activity ◽

Agricultural Activities ◽

Taxonomic Richness ◽

Physico Chemical ◽

Spatio Temporal ◽

The Impact

We conducted a study to assess the impact of peri-urban agricultural activities of the city of Dschang on the water quality and macroinvertebrate structure of the Menoua stream. This study covered 3 stations (one reference station at the upstream of the peri-urban agricultural activities and two downstream) with a monthly sampling frequency from March 2015 to February 2016. The physico-chemical analysis were carried out according to standard protocols while the benthic macro-fauna was harvested using a haze net of 30 cm side and 400 μm mesh size. Physico-chemical parameters such as temperature, pH, conductivity, TDS (Total Dissolved Solids), salinity, turbidity, colour, SS (Suspended Solids), nitrate, ammonium and orthophosphate were analyzed. The inventory of benthic macroinvertebrates revealed a taxonomic richness of 42 families and 77 taxa and a gross abundance of 1833 individuals. Spatio-temporal monitoring of physicochemical and biological parameters provided the image of relatively low pollution. Metrics such as total taxonomic richness, richness of ETO (Ephemeroptera-Trichoptera-Odonata), relative abundance of Ephemeroptera-Trichoptera-Odonate (% ETO), diversity of Shannon and Weaver and Pielou's equitability were determined at each of the three stations. These indices, unlike several other studies, increased downstream of anthropogenic activities. Low agricultural activity in the watershed has resulted in habitat diversification and availability of resources for benthic macroinvertebrates, resulting in increased abundance and diversity

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