benthic sampling Articles
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WKC Newsletter: Second Edition, September 2021
Welcome to our quarterly newsletter, where we share our latest news, environmental consulting sector updates and introduce you to our latest open source environmental engineering tools. Enjoy! Read more About WKC Group WKC Group is an award-winning, international environmental consultancy firm with strategically located offices in the Middle East, Africa, and Europe. Technical Air Quality Noise ...
By WKC Group
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Development of a macroinvertebrate-based Nepal Lake Biotic Index (NLBI): an applied method for assessing the ecological quality of lakes and reservoirs in Nepal
In Nepal, the impairment status of lakes and reservoirs has generally been measured and classified based on nutrient concentrations and physico-chemical parameters, typically with no direct measurement of biological communities. In response to the recent focus on the bioassessment of lakes and reservoirs, the macroinvertebrate-based Nepal Lake Biotic Index (NLBI) has been developed. Benthic ...
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Effect of sample area and sieve size on benthic macrofaunal community condition assessments in California enclosed bays and estuaries
Benthic macrofauna are used extensively for environmental assessment, but the area sampled and sieve sizes used to capture animals often differ among studies. Here, we sampled 80 sites using 3 different sized sampling areas (0.1, 0.05, 0.0071 m2) and sieved those sediments through each of 2 screen sizes (0.5, 1 mm) to evaluate their effect on number of individuals, number of species, dominance, ...
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Ecological Risk Assessment for Residual Coal Fly Ash at Watts Bar Reservoir, Tennessee Limited Alteration of Riverine‐reservoir Benthic Invertebrate Community Following Dredging of Ash‐contaminated Sediment
Benthic invertebrate communities were assessed following the December 2008 release of approximately 4.1 million m3 of coal fly ash from a disposal dredge cell at the Tennessee Valley Authority (TVA) Kingston Fossil Plant on Watts Bar Reservoir in Roane County, Tennessee. Released ash filled the adjacent embayments and the main channel of the Emory River migrating into reaches of the Emory, ...
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Application of classification trees to determine biological and chemical indicators for river assessment: case study in the Chaguana watershed (Ecuador)
Benthic macroinvertebrates were sampled in the Chaguana river basin in SW Ecuador in March (wet season) and September (dry season) of 2005 and 2006. Aquatic insects dominated the macrobenthos, with Trichoptera, Diptera, Ephemeroptera, Hemiptera and Odonata being the orders with the highest diversity and Ephemeroptera and Diptera being most abundant. No systematic differences in richness and ...
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Evaluation of Metals, Metalloids, and Ash Mixture Toxicity Using Sediment Toxicity Testing
In December 2008, a release of 4.1 million m3 of coal ash from the Tennessee Valley Authority Kingston Fossil plant occurred. Ash washed into the Emory River and migrated downstream into the Clinch and Tennessee Rivers. A Baseline Ecological Risk Assessment evaluated risks to ecological receptors from ash in the river system post‐dredging. This paper describes the approach used and results ...
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