20080868 Ver 2_I-18 2014 Muddy Sweep Downstream Biotic Index Table_20150717

Table[-18. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Muddy Creek downstream station in
May 2014.
Number of
Sensitivity
Abundance
Product of
Species /taxona
individualsb
value (SV)`
value (n)
(SV)(n)
Annelida
Oligochaeta
Tubificidae sp. w/o hair
12
1.0
10
10.0
Polychaeta
Amphicteis floridus
104
2.0
100
200.0
Eteone heteropoda
16
1.6
10
16.0
Laeonereis culveri
14
1.0
10
10.0
Polydora cornuta
38
1.2
30
36.0
Streblospio benedicti
1
1.1
1
1.1
Arthropoda
Insecta
Coleoptera
Berosus sp.
1
1.5
1
1.5
Peltodytes sp.
1
1.4
1
1.4
Diptera
Bezzia/Palmonyia complex
3
2.3
3
6.9
Chironomus decorus
300
1.0
100
100.0
Cricotopus sp.
5
1.4
3
4.2
Dicrotendipes nemosus
3
1.0
3
3.0
Goeldichironomus devineyae
237
2.0
100
200.0
Parachironomus sp.
27
1.1
10
11.0
Tanytarsus sp.
15
2.3
10
23.0
Hemiptera
Abedus/Belostoma sp.
3
1.0
3
3.0
Corixidae sp.
27
1.3
10
13.0
Odonata
Enallagma sp.
4
1.5
3
4.5
Libellula sp.
4
1.1
3
3.3
Malacostraca
Amphipoda
Apocorophium louisianum
68
2.2
30
66.0
Apocorophium sp.
167
2.2
100
220.0
Gammarus mucronatus
300
2.3
100
230.0
Gammarus tigrinus
151
2.0
100
200.0
Decapoda
Palaemonetes pugio
29
2.5
10
25.0
Rhithropanopeus harrisii
14
2.5
10
25.0
Isopoda
Cassidinidea lunifrons
11
2.0
10
20.0
Cyathura polita
4
2.0
3
6.0
Tanaidacea
Hargeria rapax
26
1.6
10
16.0
Mollusca
Gastropoda
Littoridinops tenuipes
300
2.0
100
200.0
Total
884
1,655.9
Estuarine Biotic Index = 1.87
Total taxa = 33
Total taxa with sensitivity values = 29
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.
I -22