20080868 Ver 2_I-45 2017 Drinkwater Ponar Downstream Raw Data Table_20180629

Table 1-45. Numbers of benthic macroinvertebrates collected in each ponar grab sample at the
Drinkwater Creek downstream station in May 2017.
Species/taxon
Drinkwater Creek Downstream Samples
1
2
3
4
5
Average
Annelida
Polychaeta
Eteone heteropoda
1
6
4
0
2
2.6
Marenzelleria viridis
30
49
25
41
35
36.0
Mediomastus ambiseta
2
22
8
10
10
10.4
Streblospio benedicti
2
1
2
6
8
3.8
Arthropoda
Insecta
Diptera
Chironomus decorus
0
2
0
0
0
0.4
Tanypus neopunctipennis
0
1
0
2
0
0.6
Hemiptera
Corixidae sp.
37
2
1
2
0
8.4
Trichocorixa sexcinta
4
1
1
0
0
1.2
Malacostraca
Amphipoda
Apocorophium louisianum
0
2
0
0
0
0.4
Apocorophium sp.
2
1
0
0
0
0.6
Gammarus tigrinus
2
7
0
1
1
2.2
Isopoda
Cyathura polita
0
0
1
2
1
0.8
Edotia montosa
0
0
1
0
1
0.4
Mysida
Americamysis almyra
2
1
1
1
0
1.0
Ostracoda
Cyprideis littoralis
2
1
6
1
2
2.4
Mollusca
Bivalvia
Bivalvia sp.
0
0
3
0
0
0.6
Macoma balthica
0
0
1
1
0
0.4
Macoma tenta
1
0
0
0
1
0.4
Rangia cuneata
1
3
2
1
5
2.4
Gastropoda
Littoridinops sp.
75
8
18
4
3
21.6
Total taxa by sample
161
107
74
72
69
Total abundance = 483
Total taxa present = 17
Shannon -Wiener diversitv = 2.00
1-51