Seasonality in water quality and its influence on the abundance and distribution of phytoplankton and chironomid larvae in Lake Nakuru, Kenya

2008 ◽  
Vol 30 (3) ◽  
pp. 333-338 ◽  
Author(s):  
Samuel Kibichii ◽  
William A. Shivoga ◽  
Mucai Muchiri ◽  
Erick Enanga ◽  
Scott N. Miller
Keyword(s):  
Water Quality ◽  
Lake Nakuru ◽  
Chironomid Larvae ◽  
Abundance And Distribution

scholarly journals Biological Water Quality Indices Performance Based on Aquatic Insects in Recreational Rivers

2021 ◽  
Vol 32 (1) ◽  
pp. 89-103
Author(s):  
Ahmad Hadri Jumaat ◽  
◽  
Suhaila Abdul Hamid ◽  
Keyword(s):  
Water Quality ◽  
Aquatic Insects ◽  
Aquatic Insect ◽  
Working Party ◽  
Biotic Index ◽  
Biological Index ◽  
Biological Water ◽  
The Status ◽  
Suitable Index ◽  
Abundance And Distribution

Abundance and distribution of aquatic insects respecting to several water chemical parameters from six rivers were studied in order to determine the performance of biological index in monitoring the water quality. A total of 960 individuals of aquatic insects from nine orders were recorded using kick and drag sampling techniques. Lubok Semilang had the greatest number of aquatic insects with 250 individuals, followed by Telaga Tujuh (181 individuals) and Sungai Durian Perangin (171 individuals). EPT (Ephemeroptera, Plecoptera and Trichoptera) order were the most dominant order recorded in all six rivers. Lata Kekabu had more diverse and richer aquatic insect assemblages based on ecological indices compared to the other five rivers. In order to evaluate the water quality of recreational rivers in Malaysia, Family Biotic Index (FBI), Malaysian Family Biotic Index (MFBI) and Biological Monitoring Working Party (BMWP) were used and compared with Water Quality Index to determine the water quality at the study areas. Results demonstrated that the biotic indices were more sensitive towards changes in water parameters than the WQI. Among all the biological indices, MFBI was the most suitable index to be adopted in Malaysian river water assessment as it is more reliable in assessing the status of water quality.

scholarly journals Composition of planktonic organisms and its associated physico-chemical parameters in two ponds at African regional aquaculture centre (ARAC) Aluu, Port Harcourt

1970 ◽  
Vol 21 (1) ◽  
pp. 1-5
Author(s):  
GN Woke ◽  
IP Aleleye-Wokoma
Keyword(s):  
Water Quality ◽  
Heavy Rainfall ◽  
Aquatic Organisms ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Port Harcourt ◽  
Dominant Classes ◽  
Abundance And Distribution ◽  
Plankton Communities

Composition of plankton communities in two ponds at African Regional Agriculture Centre (ARAC) Aluu, Port Harcourt was undertaken between May and June 2004, to assess the composition, relative abundance and distribution of plankton. The diversity of plankton was poor. Twenty-eight taxa representing four (4) families were recorded for phytoplankton while seventeen taxa representing four families were identified for zooplankton. Chlorophyta and Cladocera were the most dominant classes in phytoplankton and zooplankton in terms of abundance, constitute 13.0% and 17.1% respectively. The water quality of the ponds is evident by high temperature (28.80C), depth (57.5cm), transparency (42), dissolved oxygen (4.9mg/l) and low BOD of (1.4mg/l). The lower density of organisms could be partly attributed due to heavy rainfall which destabilize the surface water and substrate. Hence, extensive studies of the ponds where aquatic organisms are kept should be carried out to maintain proper utilization of ponds.KEYWORDS: Plankton, composition, communities richness, abundance.

scholarly journals Correlation of Shiga Toxin Gene Frequency with Commonly Used Microbial Indicators of Recreational Water Quality

2008 ◽  
Vol 75 (2) ◽  
pp. 316-321 ◽  
Author(s):  
Cody J. Smith ◽  
Adam M. Olszewski ◽  
Steven A. Mauro
Keyword(s):  
Water Quality ◽  
Shiga Toxin ◽  
Toxin Gene ◽  
Recreational Water ◽  
Specific Detection ◽  
Sampling Area ◽  
Microbial Indicators ◽  
Viral Particles ◽  
Abundance And Distribution ◽  
Presque Isle

ABSTRACT Shiga toxin (Stx) genes produce proteins that are pathogenic to humans, leading to severe gastrointestinal illness. This work focuses on examining the abundance and distribution of stx genes in relation to common microbial indicators in beach water and streams in the vicinity of Presque Isle State Park in Erie, PA. By use of quantitative PCR, the relative abundance levels of stx DNA in over 700 samples in the sampling area were determined. The results demonstrate that the abundance and distribution of stx genes are variable and do not correlate with the abundance of Escherichia coli bacteria, enterococci, or viral particles. These results suggest that microbial indicators of water quality are not adequate in predicting the occurrence of organisms that harbor stx genes and highlight the need for standardized pathogen-specific detection protocols for waters utilized for recreational swimming.

scholarly journals ABUNDANCE AND DISTRIBUTION OF BLOOD CLAMS (Anadara granosa) IN COASTAL WATERS OF MEKARBARU VILLAGE KEPULAUAN MERANTI

2020 ◽  
Vol 3 (1) ◽  
pp. 11-19
Author(s):  
Hendra ◽  
Efriyeldi Efriyeldi ◽  
Musrifin Galib
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Coastal Waters ◽  
Survey Methods ◽  
Descriptive Analysis ◽  
Average Abundance ◽  
Blood Clam ◽  
Materials Used ◽  
Abundance And Distribution ◽  
Anadara Granosa

This research is expected to find out how abundance and distribution of blood clams (Anadara Granosa) in coastal waters of Mekarbaru village, Kepulauan Meranti District. In good conditions or during the season in a particular month there is more capture compared to when it is not in season. Analyze using descriptive analysis research methods using survey methods. The materials used in this study were blood clam samples (A.granosa), and aquades for tool rinsing. The results of this study can be concluded that the average abundance of blood clams of A. granosa in the coastal waters of Mekarbaru Village, Kepulauan Meranti District is different. The highest average blood clam abundance was found at station III which was 21.86 Ind / m2 and the lowest was at station II which was 19.63 Ind/m2. The size distribution of blood clams A. granosa can be seen that dominating is the size of <25 mm (small), while the size of 25-30 mm (Medium) is only found at each station. The abundance of small blood clams A. granosa is influenced by the content of sediment organic matter and water quality in the coastal waters of Mekarbaru Village, Kepulauan Meranti Regency.

scholarly journals B-4 Usefulness of Polypedilum chironomid larvae as water quality indicators

1995 ◽  
Vol 46 (Supplement) ◽  
pp. 51
Author(s):  
K. Kawai ◽  
S. Nakama ◽  
H. Imabayashi
Keyword(s):  
Water Quality ◽  
Quality Indicators ◽  
Chironomid Larvae ◽  
Water Quality Indicators

scholarly journals Physico-chemical and biological evaluation of Blue Nile River at Lake Tana, Ethiopia, in relation to discharge of tannery effluent

2020 ◽  
Vol 13 (3) ◽  
pp. 185-195
Author(s):  
Mekdes Hone ◽  
Getachew Beneberu
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Samples ◽  
Biological Evaluation ◽  
Nile River ◽  
Tannery Effluent ◽  
Bahir Dar ◽  
Chironomid Larvae ◽  
Blue Nile ◽  
Low Dissolved Oxygen

Pollution of aquatic ecosystems with waste-water coming from tanneries is a serious challenge worldwide. The purpose of this study was to assess the water quality of Blue Nile River at a tannery in Bahir Dar, Ethiopia, using physicochemical and biological attributes. Four sampling sites were selected along the river based on the degree of degradation and major land-use types. Phyisco-chemical data, water samples, and chironomid larvae were collected monthly from March-May, 2016. Two liters of water were collected from each site and stored in the icebox and transported to Bahir Dar University. Water samples were analyzed for nutrients following standard procedures.  Chironomid larvae were collected using a D- Frame net of 500 µm mesh size. One-way ANOVA was used to compare variations in all measured parameters among the sampling sites. Low dissolved oxygen (2.8 mg/l) was recorded at the site where the tannery meets the river. Moreover, the concentration of soluble reactive phosphorus, SRP (25.5±14.3 μg/l) and conductivity (1907.3±39.5 µS/cm) were low in the most upstream site of the river. A total of six Chironomid genera belonging to the subfamilies Chironominae and Tanypodinae were identified.  The genus Chironomus dominated the impacted sites that had low dissolved oxygen levels. The other five genera were not found in those impacted sites. The result of this study indicated that the tannery effluent had impact on chironomid distribution as well as on river water quality.

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