20080868 Ver 2_I-3 2015 Jacks Sweep Upstream Biotic Index Table_20160708

Table 1-3. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Jacks Creek upstream station in May
2015.
Species/taxon'
Number of
individualsb
Sensitivity
value (SV)`
Abundance
value (n)
Product of
(SV)(n)
Annelida
Oligochaeta
Tubificidae sp. wio hair
9
1.0
3
3.0
Polychaeta
Amphicteis floridus
107
2.0
100
200.0
Arthropoda
Insecta
Coleoptera
Berosus sp.
10
1.5
10
15.0
Peltodytes sp.
3
1.4
3
4.2
Diptera
Anopheles sp.
1
1.3
1
1.3
Bezzia/Palmonyia complex
15
2.3
10
23.0
Chironomus decorus
98
1.0
30
30.0
Dicrotendipes nervosus
24
1.0
10
10.0
Goeldichironomus devineyae
76
2.0
30
60.0
Parachironomus sp.
18
1.1
10
11.0
Procladius sp.
31
1.2
30
36.0
Tanytarsus sp.
64
2.3
30
69.0
Hemiptera
Abedus/Belostoma sp.
12
1.0
10
10.0
Pelocoris femoratus
3
2.3
3
6.9
Odonata
Enallagma sp.
71
1.5
30
45.0
Libellula sp.
4
1.1
3
3.3
Trichoptera
Oecetis inconspicua
3
4.6
3
13.8
Malacostraca
Amphipoda
Apocorophium louisianum
13
2.2
10
22.0
Apocorophium sp.
293
2.2
100
220.0
Gammarus tigrinus
286
2.0
100
200.0
Decapoda
Rhithropanopeus harrish
1
2.5
1
2.5
Isopoda
Cassidinidea lunifrons
16
2.0
10
20.0
Cyathura polita
3
2.0
3
6.0
Edotia montosa
3
2.6
3
7.8
Mollusca
Bivalvia
Mytilopsis leucophaeta
9
1.5
3
4.5
Gastropoda
Littoridinops sp.
300
2.0
100
200.0
Total
646
1,224.3
Estuarine Biotic Index = 1.90
Total taxa = 30
Total taxa with sensitivitv values = 25
'Only those taxa for which a sensitivity value is available are displayed
bTotal number of individuals caught in all three sweep replicates.
°Sensitivity values provided by NCDWR.
W1,