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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