Invertebrate Program Statistics and Summary
Since the bioassessment program began in 1994, benthic macroinvertebrate surveys have been a critical component of the assessment process.
1,301,511
Total Invertebrates Collected
957
Unique Taxa
2,846
Total Surveys
2,658
BMIBI Assessments
Top 5 Most Collected Taxa
| Taxa | # Collected |
|---|---|
| Chironomidae | 252,351 |
| Cheumatopsyche | 124,110 |
| Baetis intercalaris | 39,872 |
| Tricorythodes | 39,703 |
| Hydropsychidae | 37,395 |
Top 5 Most Common Taxa
| Taxa | % of all sites |
|---|---|
| Chironomidae | 70.06% |
| Cheumatopsyche | 59.88% |
| Hydropsychidae | 54.65% |
| Oligochaeta | 51.93% |
| Physa | 50.31% |
Valid Assessments
| Assessment Type | Count |
|---|---|
| Warm Water | 2267 |
| Cold Water | 242 |
| Rapid Assessment | 188 |