20080868 Ver 2_I-13 2014 Long Sweeps Upstream Biotic Index Table_20150717

Table 1 -13 Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Long Creek upstream 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
Tubificidae sp. w/o hair
6
1.0
3
3.0
Polychaeta
Amphicteis floridus
153
2.0
100
200.0
Eteone heteropoda
81
1.6
30
48.0
Laeonereis culveri
3
1.0
3
3.0
Neanthes succinea
1
1.7
1
1.7
Polydora cornuta
49
1.2
30
36.0
Streblospio benedicti
2
1.1
1
1.1
Arthropoda
Coleoptera
Tropisternus quadristriatus
2
1.1
1
1.1
Insecta
Diptera
Bezzia/Palpomyia complex
4
2.3
3
6.9
Chironomus decorus
300
1.0
100
100.0
Cricotopus sp.
11
1.4
10
14.0
Dicrotendipes nervosus
29
1.0
10
10.0
Goeldichironomus devineyae
59
2.0
30
60.0
Parachironomus sp.
8
1.1
3
3.3
Tanypus neopunctipennis
1
1.0
1
1.0
Tanytarsus sp.
49
2.3
30
69.0
Hemiptera
Corixidae sp.
2
1.3
1
1.3
Trichocorixa sexcinta
2
1.0
1
1.0
Odonata
Enallagma sp.
8
1.5
3
4.5
Malacostraca
Amphipoda
Apocorophium louisianum
30
2.2
30
66.0
Apocorophium sp.
213
2.2
100
220.0
Gammarus mucronatus
232
2.3
100
230.0
Gammarus tigrinus
4
2.0
3
6.0
Decapoda
Palaemonetes pugio
16
2.5
10
25.0
Rhithropanopeus harrisii
24
2.5
10
25.0
Isopoda
Cassidinidea lunifrons
2
2.0
1
2.0
Edotia montosa
1
2.6
1
2.6
Tanaidacea
Hargeria rapax
45
1.6
30
48.0
Maxillopoda
Balanus improvisus
2
2.0
1
2.0
Mollusca
Bivalvia
Macoma tenta
2
2.0
1
2.0
Gastropoda
Littoridinops tenuipes
144
2.0
100
200.0
Total
748
1,393.5
Estuarine Biotic Index = 1.86
Total taxa = 34
Total taxa with sensitivity values = 31
'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.
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