20080868 Ver 2_I-45 2015 Drinkwater Ponar Downstream Raw Data Table_20160708

Table 1-45. Numbers of benthic macroinvertebrates collected in each ponar grab sample at the
Drinkwater Creek downstream station in May2014.
Species/taxon
Drinkwater Creek Downstream Samples
1
2
3
4
5
Average
Annelida
Oligochaeta
Tubificidae sp. w/o hair
1
0
1
0
0
0.4
Tubificoides heterochaetus
0
1
0
0
0
0.2
Polychaeta
Amphicteis floridus
2
1
1
0
1
1.0
Eteone heteropoda
1
4
4
2
1
2.4
Marenzelleria viridis
8
8
6
2
1
5.0
Mediomastus ambiseta
0
5
1
0
0
1.2
Streblospio benedicti
7
8
2
1
0
3.6
Arthropoda
Insecta
Diptera
Chironomus decorus
13
13
9
2
1
7.6
Malacostraca
Amphipoda
Gammarus tigrinus
2
0
0
0
0
0.4
Mysida
Americamysis sp.
0
0
1
0
0
0.2
Ostracoda
Cyprideis littoralis
0
1
4
0
0
1.0
Mollusca
Bivalvia
Macoma balthica
1
2
1
0
0
0.8
Macoma tenta
9
7
8
2
3
5.8
Gastropoda
Littoridinops sp.
6
3
4
0
0
2.6
Total taxa by sample
50
1 53
1 42
1 9
1 7
Total abundance = 161
Total taxa present = 13
Shannon -Wiener diversitv = 2.18
1-53