20080868 Ver 2_I-15 2014 Tooley Sweep Upstream Biotic Index Table_20150717

Table 1 -15. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Tooley Creek upstream station in
May 2014.
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Number of
Sensitivity
Abundance
Product of
Species /taxona
individuals"
value (SV)°
value (n)
(SV)(n)
Annelida
Oligochaeta
Tubificidae sp. w/o hair
39
1.0
30
30.0
Polychaeta
Amphicteis floridus
130
2.0
100
200.0
Eteone heteropoda
123
1.6
100
160.0
Marenzelleria viridis
7
2.6
3
7.8
Polydora cornuta
12
1.2
10
12.0
Streblospio benedicti
9
1.1
3
3.3
Arthropoda
Insecta
Diptera
Bezzia/Palpomyia complex
17
2.3
10
23.0
Chironomus decorus
300
1.0
100
100.0
Dicrotendipes nervosus
1
1.0
1
1.0
Goeldichironomus devineyae
25
2.0
10
20.0
Parachironomus sp.
42
1.1
30
33.0
Polypedilum sp.
8
1.5
3
4.5
Tanytarsus sp.
2
2.3
1
2.3
Odonata
Enallagma sp.
3
1.5
3
4.5
Malacostraca
Amphipoda
Apocorophium louisianum
37
2.2
30
66.0
Apocorophium sp.
262
2.2
100
220.0
Gammarus mucronatus
257
2.3
100
230.0
Gammarus tigrinus
6
2.0
3
6.0
Decapoda
Palaemonetes pugio
25
2.5
10
25.0
Rhithripanopeus harrisii
34
2.5
30
75.0
Isopoda
Cassidinidea lunifrons
10
2.0
10
20.0
Cyathura polita
17
2.0
10
20.0
Edotia montosa
7
2.6
3
7.8
Tanaidacea
Hargeria rapax
188
1.6
100
160.0
Mollusca
Bivalvia
Macoma balthica
15
1.5
10
15.0
Gastropoda
Littoridinops tenuipes
297
2.0
100
200.0
Total
910
1,646.2
Estuarine Biotic Index = 1.81
Total taxa = 28
Total taxa with sensitivity values = 26
aOnly 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.
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