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An investigation into the abundance of freshwater invertebrates in pools and riffles at six different sites of Embercombe and Nutscale Water
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Introduction An investigation into the abundance of freshwater invertebrates in pools and riffles at six different sites of Embercombe and Nutscale Water, and more specifically into the abundance of swimming mayfly in relation to the velocity of the site where they are found. The investigation involved sampling freshwater invertebrates by stone washing and counting the abundance of the different species at the different sites. The abiotic factors velocity, temperature, width and depth of the sites were also measured. Prediction I think there will be a difference in the abundance of freshwater invertebrates between pools and riffles. I think there will be a greater abundance of freshwater invertebrates in riffles and very few in pools. This is because riffles are ideal if the organism requires a large amount of oxygen as the fast flow of riffles allows more oxygen to dissolve in the water. Also their low depth means that predators such as fish can...
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