Invertebrate Program Statistics and Summary
Since the bioassessment program began in 1994, benthic macroinvertebrate surveys have been a critical component of the assessment process.
1,381,897
Total Invertebrates Collected
957
Unique Taxa
2,963
Total Surveys
2,775
BMIBI Assessments
Top 5 Most Collected Taxa
| Taxa | # Collected |
|---|---|
| Chironomidae | 264,544 |
| Cheumatopsyche | 132,739 |
| Tricorythodes | 42,096 |
| Baetis intercalaris | 41,985 |
| Hydropsychidae | 39,936 |
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 | 2377 |
| Cold Water | 251 |
| Rapid Assessment | 188 |