20080868 Ver 2_I-37 2017 Jacobs Ponar Downstream Raw Data Table_20180629

Table 1-37. Numbers of benthic macroinvertebrates collected in each ponar grab sample at the Jacobs
Creek downstream station in May 2017.
Species/taxon
Jacobs Creek Downstream Samples
1
2
3
4
5
Average
Annelida
Oligochaeta
Tubificoides heterochaetus
3
5
2
2
1
2.6
Polychaeta
Amphicteis f/oridus
1
0
0
2
1
0.8
Eteone heteropoda
2
5
4
6
5
4.4
Heteromastus filiformis
0
1
1
0
0
0.4
Marenzellaria viridis
52
66
69
48
58
58.6
Mediomastus ambiseta
26
80
60
42
30
47.6
Streb/ospio benedicti
0
7
3
1
4
3.0
Arthropoda
Insecta
Diptera
Chironomus decorus
1
1
0
0
0
0.4
Tanypus neopunctipennis
0
2
0
0
0
0.4
Malacostraca
Amphipoda
Apocorophium lacustre
2
0
0
5
1
1.6
Apocorophium sp.
0
0
0
0
7
1.4
Gammarus mucronatus
0
1
0
0
0
0.2
Gammarus tigrinus
1
4
15
8
46
14.8
Isopoda
Cyathura polita
3
1
1
0
3
1.6
Edotia montosa
0
6
0
2
1
1.8
Mysida
Americamysis almyra
1
7
2
0
4
2.8
Ostracoda
Candonidae sp.
0
0
0
2
0
0.4
Cyprideis littoralis
1
7
4
7
2
4.2
Mollusca
Bivalvia
Macoma balthica
1
2
0
0
5
1.6
Macoma tenta
7
3
6
8
10
6.8
Macoma sp.
0
0
0
1
0
0.2
Rangia cuneata
15
13
6
13
14
12.2
Gastropoda
Littorldinops sp.
4
6
9
5
14
7.6
Total taxa by sample
120
217
182
152
206
Total abundance = 877
Total taxa present = 21
Shannon -Wiener diversity = 2.07
1-43