20080868 Ver 2_I-77 2017 DCUT19 Ponar Downstream Raw Data Table_20180629

Table 1-77. Numbers of benthic macroinvertebrates collected in each ponar grab sample at the
DCUT19 downstream station in May 2017.
Species/taxon
DCUT19 Downstream Samples
1 2
3
4
5
Average
Annelida
Hirudinea
Myzobdella lugubris
0
0
0
4
0
0.8
Oligochaeta
Naididae sp. w/o hair
20
0
4
4
0
5.6
Tubificoides heterchaetus
0
16
12
0
15
8.6
Polychaeta
Amphicteis floridus
100
100
100
100
100
100.0
Eteone heteropoda
4
0
0
0
0
0.8
Laeonereis culveri
24
16
12
12
12
15.2
Marenzellaria viridis
16
4
8
4
15
9.4
Polydora cornuta
0
4
0
0
0
0.8
Arthropoda
Insecta
Coleoptera sp.
Berosus
0
4
0
0
0
0.8
Diptera
Bezzia/Palpomyia complex
16
24
16
12
12
16.0
Chironomus decorus
24
12
8
68
96
41.6
Dicrotendipes nervosus
0
100
0
0
9
21.8
Goeldichironomus devineyae
0
0
0
4
0
0.8
Tanytarsus sp.
0
60
4
8
0
14.4
Malacostraca
Amphipoda
Apocorophium lacustre
4
60
8
0
0
14.4
Apocorophium sp.
0
28
0
8
12
9.6
Gammarus tigrinus
100
100
100
100
100
100.0
Isopoda
Cyathura polita
16
0
12
12
9
9.8
Edotia montosa
0
0
0
4
0
0.8
Maxillopoda
Harpacticoida sp.
0
0
4
0
0
0.8
Ostracoda
Candonidae sp.
56
20
76
44
18
42.8
Cyprideis littoralis
48
12
56
76
42
46.8
Mollusca
Bivalvia
Mytilopsis leucophaeta
0
0
0
0
3
0.6
Rangia cuneata
0
0
0
8
0
1.6
Gastropoda
Littoridinops sp.
36
48
56
100
42
56.4
Nematoda
Nematoda sp.
16
16
4
4
0
8.0
Total taxa by sample
480
624
480
572
485
Total abundance = 2,641
Total taxa present = 24
Shannon -Wiener diversity = 2.52
1-83