20080868 Ver 2_I-69 2014 Porter Ponar Downstream Raw Data Table_20150717

Table 1 -69. Numbers of benthic macroinvertebrates collected in each ponar grab sample at the Porter
Creek downstream station in May 2014.
1 -75
Porter Creek Downstream Samples
Species /taxon
1
2
3
4
5
Average
Annelida
Polychaeta
Heteromastus filiformis
0
1
2
0
0
0.6
Mediomastus ambiseta
5
8
3
5
12
6.6
Streblospio benedicti
4
11
13
0
2
6.0
Arthropoda
Insecta
Diptera
Chironomus decorus
37
39
36
55
30
39.4
Tanypus neopunctipennis
5
9
26
6
17
12.6
Malacostraca
Amphipoda
Apocorophium sp.
0
0
1
0
0
0.2
Gammarus tigrinus
1
0
0
0
0
0.2
Mollusca
Bivalvia
Macoma balthica
13
6
4
2
9
6.8
Macoma tenta
12
13
11
10
12
11.6
Mulinia lateralis
0
0
0
0
1
0.2
Gastropoda
Littoridinops tenuipes
2
1
1
0
0
0.8
Total taxa by sample
79
88
97
78
83
Total abundance = 425
Total taxa present = 11
Shannon - Wiener diversity = 1.62
1 -75