Water: Monitoring & Assessment
Tables 4.6 - 4.9
| Primary Metrics | (M) Monitored Site Values |
Biosurvey Score (Circle the appropriate range for each metric) |
Table 4.6 Metric worksheet for rocky-bottom streams |
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| 6 | 3 | 0 | |||
| No. of Taxa | . | >15 | 15-8 | <8 | |
| No. of EPT Taxa | . | >8 | 8-4 | <4 | |
| % Dominance | . | <34% | 34-67% | >67% | |
| Sensitive Taxa Index | . | <4.8 | 4.8-6.4 | >6.4 | |
| Optional Metrics | . | . | . | . | |
| % Abundance of Scrapers | . | >18% | 18-10% | <10 | |
| % Abundance of Shredders | . | >9% | 9-5% | <5% | |
| COLUMN SCORE (Multiply no. of circled values by the biosurvey score) |
. | . | . | ||
| TOTAL SCORE (Sum all the column scores) |
. | . | . | ||
| Notes: If fewer than 60 individuals in the monitored site, don't calculate metrics for any of the sites. Biosurvey scoring ranges determined for the summer index period. | |||||
| Primary Metrics | (M) Monitored Site Values |
Biosurvey Score (Circle the appropriate range for each metric) |
Table 4.7 Metric worksheet for muddy-bottom streams |
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| 6 | 3 | 0 | |||
| No. of Taxa | . | >19 | 19-10 | <10 | |
| No. of EPT Taxa | . | >7 | 7-4 | <4 | |
| % Dominance | . | <30% | 30-50% | >50% | |
| Sensitive Taxa Index | . | <5.0 | 5.0-6.8 | >6.8 | |
| Optional Metrics | . | . | . | . | |
| % Abundance of EPT | . | >39% | 39-20% | <20 | |
| % Abundance of Midge Larvae | . | >24% | 24-60% | <60% | |
| COLUMN SCORE (Multiply no. of circled values by the biosurvey score) |
. | . | . | ||
| TOTAL SCORE (Sum all the column scores) |
. | . | . | ||
| Notes: If fewer than 60 individuals in the monitored site, don't calculate metrics for any of the sites. Biosurvey scoring ranges determined for the summer index period. | |||||
| Primary Metrics | (M) Monitored Site Values |
Biosurvey Score (Circle the appropriate range for each metric) |
Table 4.8 Sample metric worksheet for Volunteer Creek (hypothetical rocky-bottom stream) There were 119 macroinvertebrates in this sample. |
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| 6 | 3 | 0 | |||
| No. of Taxa | . | >15 | 15-8 | <8 | |
| No. of EPT Taxa | . | >8 | 8-4 | <4 | |
| % Dominance | . | <34% | 34-67% | >67% | |
| Sensitive Taxa Index | . | <4.8 | 4.8-6.4 | >6.4 | |
| COLUMN SCORE (Multiply no. of circled values by the biosurvey score) |
6 | 9 | 0 | ||
| TOTAL SCORE (Sum all the column scores) |
Biosurvey Score for this site is 15 This site scores in the Fair range, 9-15 |
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| Total Score From Metrics | Condition Category | Attributes | Table 4.9 Biosurvey Scoring Guide This guide is based on the four primary metrics. If your score falls on the boundary of two categories, consider the site's habitat assessment results and chemical data, if available, in confirming your assignment to a particular category. |
| >18-24 | Good | Comparable to the best situation to be expected within an ecoregion. Balanced trophic structure. Optimum community structure (composition and dominance) for stream size and habitat quality. | |
| 9-15 | Fair | Community structure less than expected. Composition (species richness) and diversity lower than expected due to loss of some pollution-intolerant forms. Percent contribution of tolerant forms increased. Reduction in EPT index. | |
| 0-6 | Poor | Few species present. If high denisities of organisms, then dominated by one or two polution-tolerant taxa. |