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Bear Creek at Coyote Trails Nature Center

Macroinvertebrate data: 04-05-2013



School: Oregon State University

Date and time: April 5, 2013, 10 a.m.

Water quality: Fair

Number of people sorting/identifying: 9

Water type: riffle

Time spent sorting/identifying: 45 minutes

Weather:

Percent EPT: 14.81%

Note: EPT is the total number of caddisflies, mayflies, and stoneflies found divided by number of all bugs

Field notes: Talent Middle School. 7th grade. Suspect counts and species ID.

Sensitivity to pollution
Sensitive
Count
Caddisfly
0
Mayfly
4
Riffle beetle
0
Stonefly
0
Water penny
0
Dobsonfly
0
Sensitive total
3
Somewhat Sensitive
Count
Clam/mussel
0
Crane fly
0
Crayfish
0
Damselfly
0
Dragonfly
0
Scud
20
Fishfly
0
Alderfly
0
Mite
0
Somewhat sensitive total
2
Tolerant
Count
Aquatic worm
1
Blackfly
0
Leech
0
Midge
2
Snail
0
Mosquito larva
0
Tolerant total
2