20080868 Ver 2_I-37 2015 Jacobs Ponar Downstream Raw Data Table_20160708

Table 1-37. Numbers of benthic macroinvertebrates collected in each ponar grab sample at the
Jacobs Creek downstream station in May 2015.
Species/taxon
Jacobs Creek Downstream Samples
1
2
3
4
5
Average
Annelida
Oligochaeta
Tubificidae sp. w/o hair
1
1
0
1
1
0.8
Polychaeta
Amphicteis floridus
2
1
0
0
1
0.8
Eteone heteropoda
9
1
5
1
4
4.0
Heteromastus filiformis
0
0
0
1
0
0.2
Marenzellaria viridis
1
1
0
1
0
0.6
Mediomastus ambiseta
1
3
2
0
0
1.2
Streblospio benedicti
5
10
5
6
7
6.6
Arthropoda
Insecta
Diptera
Bezzia/Palmonyia sp.
0
0
1
0
0
0.2
Chironomus decorus
79
100
100
64
100
88.6
Parachironomus sp.
0
0
0
0
3
0.6
Tanypus neopunctipennis
3
1
3
3
2
2.4
Tanytarsus sp.
4
4
4
5
1
3.6
Malacostraca
Amphipoda
Apocorophium lacustre
0
2
0
0
2
0.8
Apocorophium sp.
1
2
1
0
4
1.6
Gammarus mucronatus
0
3
0
1
3
1.4
Gammarus tigrinus
9
30
3
4
12
11.6
Isopoda
Edotia montosa
1
2
0
1
1
1.0
Mysida
Americamysis almyra
0
0
3
4
1
1.6
Tanaidacea
Hargeria rapax
0
0
0
0
1
0.2
Ostracoda
Candonidae sp.
0
0
0
0
1
0.2
Mollusca
Bivalvia
Macoma balthica
1
1
5
2
3
2.4
Macoma tenta
2
2
2
3
1
2.0
Gastropoda
Littoridinops sp.
8
2
2
3
1
3.2
Nematoda
Nematoda sp.
1
0
0
0
0
0.2
Total taxa by sample
128
166
136
100
149
Total abundance = 679
Total taxa present = 23
Shannon -Wiener diversitv = 1.55
1-45