20080868 Ver 2_I-5 2014 Jacobs Sweep Upstream Biotic Index Table_20150717

Table 1 -5. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Jacobs Creek upstream station in
May 2014.
W*
Number of
Sensitivity
Abundance
Product of
Species /taxon'
individuals"
value (SV)'
value (n)
(SV)(n)
Annelida
Oligohaeta
Tubificidae sp. w/o hair
40
1.0
30
30.0
Polychaeta
Amphicteis floridus
48
2.0
30
60.0
Laeonereis culveri
10
1.0
10
10.0
Arthropoda
Insecta
Coleoptera
Peltodytes sp.
8
1.4
3
4.2
Tropisternus sp.
5
1.0
3
3.0
Diptera
BezzialPalmonyia complex
2
2.3
1
2.3
Chironomus decorus
212
1.0
100
100.0
Goeldichironomus devineyae
156
2.0
100
200.0
Parachironomus sp.
3
1.1
3
3.3
Tanytarsus sp.
8
2.3
3
6.9
Hemiptera
Corixidae sp.
3
1.3
3
3.9
Odonata
Enallagma sp.
8
1.5
3
4.5
Libellula sp.
3
1.1
3
3.3
Malacostraca
Amphipoda
Apocorophium louisianum
62
2.2
30
66.0
Apocorophium sp.
122
2.2
100
220.0
Gammarus tigrinus
23
2.0
10
20.0
Orchestia uhleri
8
2.0
3
6.0
Isopoda
Cassidinidea lunifrons
69
2.0
30
60.0
Cyathura polita
3
2.0
3
6.0
Tanaidacea
Hargeria rapax
1
1.6
1
1.6
Mollusca
Gastropoda
Littoridinops tenuipes
300
2.0
100
200.0
Total
569
1,011.0
Estuarine Biotic Index = 1.78
Total taxa = 28
Total taxa with sensitivity values = 21
'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.
W*