Select the following URL to get to Table 2. Students record all data in this table. For those organisms collected that were not listed on the table, ask the instructor for their S, I or T classification. Using Table 1, count the organisms in each category and record the results in the appropriate box below. Add the three numbers together to get the total.
Percentages Divide the number of sensitive organisms by the total number of organisms collected.
Multiply the result by 100. Record the value on the appropriate line. This comparison deals with the biodiversity the stream offers. Healthy streams have a wide variety of organisms present whereas unhealthy streams do not. Sequential Comparison Index equals the Diversity Index multiplied by the number of different types of organisms.