Invertebrate Program Statistics and Summary
Since the bioassessment program began in 1994, benthic macroinvertebrate surveys have been a critical component of the assessment process.
1,413,810
Total Invertebrates Collected
959
Unique Taxa
3,025
Total Surveys
2,837
BMIBI Assessments
Top 5 Most Collected Taxa
| Taxa | # Collected |
|---|---|
| Chironomidae | 270,372 |
| Cheumatopsyche | 136,778 |
| Baetis intercalaris | 43,713 |
| Tricorythodes | 42,617 |
| Hydropsychidae | 40,998 |
Top 5 Most Common Taxa
| Taxa | % of all sites |
|---|---|
| Chironomidae | 65.87% |
| Cheumatopsyche | 56.49% |
| Hydropsychidae | 51.64% |
| Oligochaeta | 49.18% |
| Physa | 47.73% |
Valid Assessments
| Assessment Type | Count |
|---|---|
| Warm Water | 2431 |
| Cold Water | 257 |
| Rapid Assessment | 188 |