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Matson Creek MWS Youth Program

Macroinvertebrate data: 11-02-2012



School: Marshfield High School

Date and time: Nov. 2, 2012, 2:26 p.m.

Water quality: Good

Number of people sorting/identifying: 3

Water type: riffle

Time spent sorting/identifying: 60 minutes

Weather:

Percent EPT: 53.06%

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

Field notes: We collected insects in the water with a bag/filter. Bugs were in the water/mud and we kicked the mud in the stream and it went into the filter. We took these suction tubes and we sucked up as much bugs as we could from the bin that we collected from the mud.

Sensitivity to pollution
Sensitive
Count
Caddisfly
10
Mayfly
13
Riffle beetle
0
Stonefly
3
Water penny
0
Dobsonfly
0
Sensitive total
9
Somewhat Sensitive
Count
Clam/mussel
0
Crane fly
1
Crayfish
0
Damselfly
0
Dragonfly
0
Scud
11
Fishfly
0
Alderfly
0
Mite
9
Somewhat sensitive total
6
Tolerant
Count
Aquatic worm
0
Blackfly
0
Leech
0
Midge
0
Snail
2
Mosquito larva
0
Tolerant total
1