20080868 Ver 2_I-14 2014 Long Sweep Downstream Biotic Index Table_20150717

Table 1 -14. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Long Creek downstream station in
May 2014.
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Number of
Sensitivity
Abundance
Product of
Species /taxona
individualsb
value (SV)`
value (n)
(SV)(n)
Annelida
Oligochaeta
Peloscolex heterochaetus
1
1.1
1
1.1
Polychaeta
Amphicteis floridus
7
2.0
3
6.0
Eteone heteropoda
6
1.6
3
4.8
Marenzelleria viridis
2
2.6
1
2.6
Mediomastus ambiseta
1
2.0
1
2.0
Polydora cornuta
37
1.2
30
36.0
Streblospio benedicti
4
1.1
3
3.3
Arthropoda
Insecta
Diptera
Chironomus decorus
85
1.0
30
30.0
Dicrotendipes nervosus
6
1.0
3
3.0
Goeldichironomus devineyae
4
2.0
3
6.0
Parachironomus sp.
3
1.1
3
3.3
Tanytarsus sp.
2
2.3
1
2.3
Malacostraca
Amphipoda
Ameroculodes complex
1
2.6
1
2.6
Apocorophium lacustre
3
2.2
3
6.6
Apocorophium louisianum
57
2.2
30
66.0
Apocorophium sp.
215
2.2
100
220.0
Gammarus mucronatus
241
2.3
100
230.0
Gammarus tigrinus
44
2.0
30
60.0
Melita nitida
1
2.0
1
2.0
Decapoda
Palaemonetes pugio
45
2.5
30
75.0
Rhithropanopeus harrisii
186
2.5
100
250.0
Isopoda
Cyathura polita
10
2.0
10
20.0
Edotia montosa
8
2.6
3
7.8
Mysida
Americamysis almyra
12
2.2
10
22.0
Tanaidacea
Hargeria rapax
162
1.6
100
160.0
Maxillopoda
Balanus improvisus
17
2.0
10
20.0
Mollusca
Gastropoda
Littoridinops tenuipes
118
2.0
100
200.0
Total
710
1,442.4
Estuarine Biotic Index = 2.03
Total taxa = 33
Total taxa with sensitivity values = 27
aOnly those taxa for which a sensitivity value is available
are displayed.
TTotal number of individuals caught in all three sweep replicates.
Sensitivity values provided by NCDWR.
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