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Marys River Natural Area
Macroinvertebrate data: 07-22-2014
School: Oregon State University
Date and time: July 22, 2014, 12:30 p.m.
Water quality: Good
Number of people sorting/identifying: 2
Water type: riffle
Time spent sorting/identifying: 20 minutes
Weather:
Percent EPT: 60.00%
Note: EPT is the total number of caddisflies, mayflies, and stoneflies found divided by number of all bugs
Field notes: Water boatman: 1 Under snail, the form states, Juga: 14, Flum: 1, but only 1 total snail is counted.
Sensitivity to pollution
Sensitive
Count | |
---|---|
Caddisfly |
1 |
Mayfly |
1 |
Riffle beetle |
2 |
Stonefly |
4 |
Water penny |
0 |
Dobsonfly |
0 |
Sensitive total |
12 |
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
|
1 |
Blackfly
|
0 |
Leech
|
0 |
Midge
|
0 |
Snail
|
1 |
Mosquito larva
|
0 |
Tolerant total |
2 |