TABLE 6

SEMI-QUANTITATIVE BENTHIC MACROINVERTEBRATE DATA

OYSTERVILLE CREEK, BERKS CO.

June 10, 1999

TAXA

STATION

1OC

5OC

R1

Ephemeroptera (mayflies)

Baetidae; Acentrella

6

2

Baetis

5

15

Ephemerellidae; Drunella

32

10

19

Ephemerella

5

4

3

Serratella

9

17

2

Heptageniidae; Epeorus

4

2

5

Leucrocuta

1

Stenonema

3

2

Leptophlebiidae; Paraleptophlebia

3

Oligoneuriidae; Isonychia

1

3

1

Plecoptera (stoneflies)

Leuctridae; Leuctra

3

3

Nemouridae; Amphinemura

1

Perlidae; Acroneuria

2

3

Perlesta

6

4

12

Perlodidae; Isoperla

1

Pteronarcyidae; Pteronarcys

1

Tricoptera (caddisflies)

Glossosomatidae; Agapetus

5

Glossosoma

5

1

Hydropsychidae; Cheumatopsyche

3

1

Hydropsyche

13

20

2

Philopotamidae; Chimarra

1

Dolophilodes

7

1

21

Rhyacophilidae; Rhyacophila

3

1

1

Diptera (true flies)

Tipulidae; Antocha

1

3

Dicranota

1

Tipula

1

Chironomidae

11

6

20

Megaloptera

Corydalidae; Nigronia

1

Odonata (dragon-, damselflies)

Gomphidae; Ophiogomphus

7

Stylogomphus

1

1

Coleoptera (aquatic beetles)

Elmidae; Optioservus

8

14

1

Oulimnius

2

Stenelmis

2

8

Psephenidae; Psephenus

6

5

5

Helophoridae; Helophorus

1

Non-Insect Taxa

Turbellaria (flat-worms)

Cura

1

Oligochaeta

1

Size of subsample

145

128

109