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Silver Falls State Park
Macroinvertebrate data: 05-25-2022
School: Queen of Peace School
Date and time: May 25, 2022, 9:30 a.m.
Water quality: Fair
Number of people sorting/identifying: 21
Water type: riffle
Time spent sorting/identifying: 120 minutes
Weather: Cloudy
Percent EPT: 94.74%
Note: EPT is the total number of caddisflies, mayflies, and stoneflies found divided by number of all bugs
Field notes: We set leaf and rock packs into the stream 3 weeks prior to collecting macroinvertebrates
Sensitivity to pollution
Sensitive
| Count | |
|---|---|
Caddisfly
|
45 |
Mayfly
|
46 |
Riffle beetle
|
0 |
Stonefly
|
35 |
Water penny
|
0 |
Dobsonfly
|
0 |
| Sensitive total |
9 |
Somewhat Sensitive
| Count | |
|---|---|
Clam/mussel
|
0 |
Crane fly
|
0 |
Crayfish
|
0 |
Damselfly
|
0 |
Dragonfly
|
3 |
Scud
|
0 |
Fishfly
|
0 |
Alderfly
|
0 |
Mite
|
0 |
|
Somewhat sensitive total |
2 |
Tolerant
| Count | |
|---|---|
Aquatic worm
|
4 |
Blackfly
|
0 |
Leech
|
0 |
Midge
|
0 |
Snail
|
0 |
Mosquito larva
|
0 |
|
Tolerant total |
1 |