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OC Brown Park - North Fork Deer Creek
Macroinvertebrate data: 05-05-2016
School: Tyee Outdoor Experience
Date and time: May 5, 2016, 3:28 p.m.
Water quality: Fair
Number of people sorting/identifying: 6
Water type: riffle
Time spent sorting/identifying: 40 minutes
Weather:
Percent EPT: 86.96%
Note: EPT is the total number of caddisflies, mayflies, and stoneflies found divided by number of all bugs
Field notes: Samples were taken by mixed age groups of homeschool students. We took 2 samples on 2 different days of the same week. Since this was a lesson more focused on stream ecology, we did not do a thorough count but we identified most of the species to give us a good idea of stream health. In places where 20 were indicated, we did not finish a full count but 20+ of that macro were found.
Sensitivity to pollution
Sensitive
| Count | |
|---|---|
Caddisfly
|
0 |
Mayfly
|
20 |
Riffle beetle
|
1 |
Stonefly
|
20 |
Water penny
|
0 |
Dobsonfly
|
0 |
| Sensitive total |
9 |
Somewhat Sensitive
| Count | |
|---|---|
Clam/mussel
|
0 |
Crane fly
|
0 |
Crayfish
|
0 |
Damselfly
|
0 |
Dragonfly
|
0 |
Scud
|
0 |
Fishfly
|
0 |
Alderfly
|
0 |
Mite
|
0 |
|
Somewhat sensitive total |
0 |
Tolerant
| Count | |
|---|---|
Aquatic worm
|
0 |
Blackfly
|
0 |
Leech
|
0 |
Midge
|
0 |
Snail
|
5 |
Mosquito larva
|
0 |
|
Tolerant total |
1 |