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Willamette River At Crystal Lake
Macroinvertebrate data: 08-20-2014
School: Avery House Nature Center
Date and time: Aug. 20, 2014, 11:24 p.m.
Water quality: Excellent
Number of people sorting/identifying: 8
Water type: pool
Time spent sorting/identifying: 30 minutes
Weather:
Percent EPT: 2.35%
Note: EPT is the total number of caddisflies, mayflies, and stoneflies found divided by number of all bugs
Field notes: 4 Water boatman, 7 Fish, 1 Nymph Back swimmer
Sensitivity to pollution
Sensitive
Count | |
---|---|
Caddisfly![]() |
0 |
Mayfly![]() |
0 |
Riffle beetle![]() |
2 |
Stonefly![]() |
2 |
Water penny![]() |
0 |
Dobsonfly![]() |
1 |
Sensitive total |
9 |
Somewhat Sensitive
Count | |
---|---|
Clam/mussel
![]() |
0 |
Crane fly
![]() |
4 |
Crayfish
![]() |
0 |
Damselfly
![]() |
7 |
Dragonfly
![]() |
3 |
Scud
![]() |
9 |
Fishfly
![]() |
1 |
Alderfly
![]() |
1 |
Mite
![]() |
5 |
Somewhat sensitive total |
14 |
Tolerant
Count | |
---|---|
Aquatic worm
![]() |
0 |
Blackfly
![]() |
0 |
Leech
![]() |
0 |
Midge
![]() |
13 |
Snail
![]() |
36 |
Mosquito larva
![]() |
1 |
Tolerant total |
3 |