20080868 Ver 2_I-50 2014 Little Ponar Downstream Biotic Index Table_20150717

Table 1 -50. Estuarine Biotic Index (EBI) calculations for benthic ponar samples at the Little Creek
downstream station in May 2014.
Total 363 495.1
Estuarine Biotic Index = 1.36
Total taxa = 19
Total taxa with sensitivity values = 19
a Only those taxa for which a sensitivity value is available are displayed.
b Total number of individuals caught in all five ponar replicates.
° Sensitivity values provided by NCDWR.
W.
Number of
Sensitivity
Abundance
Product of
Species /taxona
individualsb
value (SV)`
value (n)
(SV)(n)
Annelida
Oligochaeta
Tubificidae sp. wio hair
5
1.0
3
3.0
Polychaeta
Amphicteis floridus
98
2.0
30
60.0
Eteone heteropda
9
1.6
3
4.8
Laeonereis culveri
2
1.0
1
1.0
Marenzelleria viridis
1
2.6
1
2.6
Mediomastus ambiseta
84
2.0
30
60.0
Polydora cornuta
6
1.2
3
3.6
Streblospio benedicti
116
1.1
100
110.0
Arthropoda
Insecta
Diptera
Bezzia/Palmonyia complex
2
2.3
1
2.3
Chironomus decorus
428
1.0
100
100.0
Parachironomus sp.
2
1.1
1
1.1
Tanypus neopunctipennis
31
1.0
30
30.0
Malacostraca
Amphipoda
Apocorophium louisianum
2
2.2
1
2.2
Apocorophium sp.
6
2.2
3
6.6
Gammarus mucronatus
7
2.3
3
6.9
Gammarus tigrinus
14
2.0
10
20.0
Mollusca
Bivalvia
Macoma balthica
19
1.5
10
15.0
Macoma tenta
46
2.0
30
60.0
Gastropoda
Littoridinops tenuipes
3
2.0
3
6.0
Total 363 495.1
Estuarine Biotic Index = 1.36
Total taxa = 19
Total taxa with sensitivity values = 19
a Only those taxa for which a sensitivity value is available are displayed.
b Total number of individuals caught in all five ponar replicates.
° Sensitivity values provided by NCDWR.
W.