Invertebrate Program Statistics and Summary
Since the bioassessment program began in 1994, benthic macroinvertebrate surveys have been a critical component of the assessment process.
1,379,159
Total Invertebrates Collected
957
Unique Taxa
2,957
Total Surveys
2,769
BMIBI Assessments
Top 5 Most Collected Taxa
| Taxa | # Collected |
|---|---|
| Chironomidae | 264,248 |
| Cheumatopsyche | 132,366 |
| Tricorythodes | 42,008 |
| Baetis intercalaris | 41,892 |
| Hydropsychidae | 39,894 |
Top 5 Most Common Taxa
| Taxa | % of all sites |
|---|---|
| Chironomidae | 66.65% |
| Cheumatopsyche | 57.09% |
| Hydropsychidae | 52.15% |
| Oligochaeta | 49.58% |
| Physa | 48.11% |
Valid Assessments
| Assessment Type | Count |
|---|---|
| Warm Water | 2371 |
| Cold Water | 251 |
| Rapid Assessment | 188 |