20080868 Ver 2_I-80 2014 DCUT11 Ponar Upstream Biotic Index Table_20150717

Table 1 -80. Estuarine Biotic Index (EBI)
calculations for benthic ponar samples at the DCUT11
upstream station in May 2014.
Number of
Sensitivity
Abundance
Product of
Species /taxona
individualsb
value (SV)`
value (n)
(SV)(n)
Annelida
Polychaeta
Amphicteis floridus
368
2.0
100
200.0
Streblospio benedicti
8
1.1
3
3.3
Arthropoda
I nsecta
Coleoptera
Peltodytes sp.
4
1.4
3
4.2
Diptera
Bezzia/Palpomyia complex
17
2.3
10
23.0
Chironomus decorus
3
1.0
3
3.0
Dicrotendipes nervosus
106
1.0
100
100.0
Goe/dichironomus devineyae
6
2.0
3
6.0
Tanytarsus sp.
237
2.3
100
230.0
Hemiptera
Corixidae sp.
19
1.3
10
13.0
Trichocorixa sexcincta
2
1.0
1
1.0
Odonata
Ischnura sp.
2
1.0
1
1.0
Malacostraca
Amphipoda
Apocorophium louisianum
10
2.2
10
22.0
Apocorophium sp.
47
2.2
30
66.0
Gammarus tigrinus
458
2.0
100
200.0
Decapoda
Palaemonetes pugio
3
2.5
3
7.5
Isopoda
Cyathura polita
3
2.0
3
6.0
Mollusca
Bivalvia
Mytilopsis leucophaeata
1
1.5
1
1.5
Gastropoda
Littoridinops tenuipes
500
2.0
100
200.0
Total
581
1,087.5
Estuarine Biotic Index = 1.87
Total taxa = 21
Total taxa with sensitivity values = 18
a Only those taxa for which a sensitivity value is available are displayed.
bTotal number of individuals caught in all five ponar
replicates.
1 -86

° Sensitivity values provided by NCDWR.
:.