Invertebrate Program Statistics and Summary
Since the bioassessment program began in 1994, benthic macroinvertebrate surveys have been a critical component of the assessment process.
1,272,414
Total Invertebrates Collected
956
Unique Taxa
2,793
Total Surveys
2,605
BMIBI Assessments
Top 5 Most Collected Taxa
| Taxa | # Collected |
|---|---|
| Chironomidae | 246,205 |
| Cheumatopsyche | 120,729 |
| Tricorythodes | 38,973 |
| Baetis intercalaris | 38,870 |
| Hydropsychidae | 36,891 |
Top 5 Most Common Taxa
| Taxa | % of all sites |
|---|---|
| Chironomidae | 73.86% |
| Cheumatopsyche | 63.03% |
| Hydropsychidae | 57.55% |
| Oligochaeta | 54.66% |
| Physa | 52.78% |
Valid Assessments
| Assessment Type | Count |
|---|---|
| Warm Water | 2222 |
| Cold Water | 234 |
| Rapid Assessment | 188 |