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Willamette river Corvallis or
Macroinvertebrate data: 08-22-2014
School: Avery House Nature Center
Date and time: Aug. 22, 2014, 1:45 p.m.
Water quality: Good
Number of people sorting/identifying: 7
Water type: riffle
Time spent sorting/identifying: 30 minutes
Weather:
Percent EPT: 47.24%
Note: EPT is the total number of caddisflies, mayflies, and stoneflies found divided by number of all bugs
Field notes: So many small caddis flies but almost all with case attached to big rock 1 blue caddis no case 2 with moving cases one stone one stick others on rocks 1 planarian flat worm
Sensitivity to pollution
Sensitive
| Count | |
|---|---|
Caddisfly
|
40 |
Mayfly
|
20 |
Riffle beetle
|
5 |
Stonefly
|
0 |
Water penny
|
0 |
Dobsonfly
|
0 |
| Sensitive total |
9 |
Somewhat Sensitive
| Count | |
|---|---|
Clam/mussel
|
3 |
Crane fly
|
0 |
Crayfish
|
0 |
Damselfly
|
0 |
Dragonfly
|
0 |
Scud
|
20 |
Fishfly
|
0 |
Alderfly
|
0 |
Mite
|
0 |
|
Somewhat sensitive total |
4 |
Tolerant
| Count | |
|---|---|
Aquatic worm
|
5 |
Blackfly
|
0 |
Leech
|
0 |
Midge
|
0 |
Snail
|
34 |
Mosquito larva
|
0 |
|
Tolerant total |
2 |