20080868 Ver 2_I-4 2014 Jacks Sweep Downstream Biotic Index Table_20150717

Table 1 -4. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Jacks Creek downstream station in
May 2014.
11H.
Number of
Sensitivity
Abundance
Product of
Species /taxona
individualsb
value (SV)°
value (n)
(SV)(n)
Annelida
Polychaeta
Amphecteis floridus
66
2.0
30
60.0
Eteone heteropoda
5
1.6
3
4.8
Laeonereis culveri
1
1.0
1
1.0
Marenzelleria viridis
9
2.6
3
7.8
Polydora cornuta
29
1.2
10
12.0
Streblospio benedicti
2
1.1
1
1.1
Arthropoda
Insecta
Diptera
Bezzia/Palpomyia complex
1
2.3
1
2.3
Chironomus decorus
176
1.0
100
100.0
Dicrotendipes nervosus
5
1.0
3
3.0
Goeldichironomus devineyae
61
2.0
30
60.0
Parachironomus sp.
17
1.1
10
11.0
Tanytarsus sp.
3
2.3
3
6.9
Hemiptera
Corixidae sp.
14
1.3
10
13.0
Trichocorixa sexcinta
1
1.0
1
1.0
Odonata
Enallagma sp.
2
1.5
1
1.5
Malacostraca
Amphipoda
Apocophorium lacustre
12
2.2
10
22.0
Apocophorium louisianum
19
2.2
10
22.0
Apocorophium sp.
187
2.2
100
220.0
Gammarus mucronatus
126
2.3
100
230.0
Gammarus tigrinus
178
2.0
100
200.0
Decapoda
Palaemonetes pugio
2
2.5
1
2.5
Rhithropanopeus harrisii
8
2.5
3
7.5
Isopoda
Cassidinidea lunifrons
13
2.0
10
20.0
Cyathura polita
16
2.0
10
20.0
Edotia montosa
11
2.6
10
26.0
Mysida
Americamysis almyra
9
2.2
3
6.6
Tanaidacea
Hargeria rapax
283
1.6
100
160.0
Maxillopoda
Sessilia
Balanus improvisus
1
2.0
1
2.0
Mollusca
Gastropoda
Littoridinops tenuipes
300
2.0
100
200.0
Total
765
1,424.0
Estuarine Biotic Index = 1.86
Total taxa = 33
Total taxa with sensitivity values = 29
11H.

20nly 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.
11:3