The U-High Creek Experiment

848 Words4 Pages
The U-high freshman biology class designed an experiment to test the question; based on the number of micro invertebrates, what is the water quality of the U-high creek? On 9/22/14, the day of the experiment, the conditions were recorded at 10:05 AM. The temperature was 55 degrees with a 6 mph wind, and 62% humidity. One of the observations of the creek is that there was some garbage and trash on the banks, although there was minimal amount. Another observation was that there was run-off leading into the creek from roads, nearby parking lots, and neighboring yards. There were about 40 small fish, only about 2-3 inches long swimming north against the current. The water was also very clear, and the bottom was clearly visible. Based on the observations…show more content…
The organisms found could be grouped in 3 groups. Pollution intolerant organisms in the creek are caddis fly larvae, riffle beetles, stonefly nymphs, Dobson larvae, may fly larvae, snipe larvae, and water fleas. There are 10 moderately tolerant species living in the creek, they are: crayfish, crane fly larvae, aquatic sow bugs, dragonfly, larvae, scuds, beetle larvae, hellgrammites, fly larvae, and alderflies. The seven pollution tolerant invertebrates living in the creek are Aquatic worms, leeches, pouch snails, midge larvae, black fly larvae, flatworms, and segmented worms. The 24 different types of micro invertebrates in the creek and the number of pollution intolerant and moderately tolerant species in the creek indicate an excellent water…show more content…
The first piece of evidence supporting this statement is a water quality index of 48. The 7 pollution sensitive organisms in the creek are worth three points each on the water quality index, plus the 10 moderately tolerant organisms each 2 points and the 7 tolerant organisms each 1 point add up to get the 48 water quality index. The water quality level is considered excellent if it is 23 or above. The water quality in the U-High creek is more than twice that. There were many different types of organisms found in the creek including 7 pollution intolerant micro invertebrates. The total number of organisms including the 88 pollution intolerant Caddis fly larvae point to a low pollution level in the creek. The 10 moderately tolerant micro invertebrates also point to low polluted creek. There were also a high number of midges and aquatic worms. The water in the creek was also very clear and did not have a smell. There were many small fish and plants growing in and around it concluding a low pollution level in the

More about The U-High Creek Experiment

Get Access