20080868 Ver 2_I-81 2017 DCUT11 Ponar Downstream Raw Data Table_20180629

Table 1-81. Numbers of benthic macro inverte brates collected in each ponar grab sample at the
DCUT11 downstream station in May 2017.
Species/taxon
DCUT11 Downstream Samples
1
2
3
4
5
Average
Annelida
Polychaeta
Amphicteis floridus
82
40
100
100
100
84.4
Arthropoda
Insecta
Coleoptera sp.
Berosus sp.
0
0
0
0
2
0.4
Diptera
Bezzia/Palpomyia complex
2
2
0
0
4
1.6
Parachironomus sp.
0
0
0
0
4
0.8
Polypedilum sp.
0
2
0
0
0
0.4
Tanypus neopunctipennis
0
0
0
2
0
0.4
Tanytarsus sp.
0
2
0
2
4
1.6
Odonata
Enallagma sp.
0
2
0
0
0
0.4
Libelluldae sp.
4
0
0
0
0
0.8
Perithemis tenera
0
0
2
0
0
0.4
Malacostraca
Amphipoda
Apocorophium lacustre
0
0
0
2
0
0.4
Apocorophium sp.
0
0
0
0
2
0.4
Gammarus tigrinus
100
70
100
100
70
88.0
Isopoda
Cassidinidea lunifrons
0
0
0
0
6
1.2
Cyathura polity
0
0
0
0
4
0.8
Ostracoda
Candonidae sp.
2
0
0
0
0
0.4
Cyprideis littoralis
6
10
18
2
2
7.6
Mollusca
Bivalvia
Mytilopsis leucophaeta
4
0
4
6
36
10.0
Gastropoda
Littoridinops sp.
72
18
50
12
34
37.2
Nematoda
Nematoda sp.
0
2
0
0
0
0.4
Total taxa by sample
272
148
274
226
268
Total abundance = 1,188
Total taxa present = 18
Shannon -Wiener diversity = 1.52
IMA