20080868 Ver 2_I-66 2014 Huddles Ponar Downstream Biotic Index Table_20150717

Table 1 -66. Estuarine Biotic Index (EBI) calculations for benthic ponar samples at the Huddles Cut
downstream station in May 2014.
Species /taxona
Annelida
Oligochaeta
Tubificidae sp. w/o hair
Polychaeta
Amphicteis f/oridus
Eteone heteropoda
Heteromastus filiformis
Marenzelleria viridis
Mediomastus ambiseta
Neanthes succinea
Polydora cornuta
Streblospio benedicti
Arthropoda
Insecta
Diptera
Chironomus decorus
Cladotanytarsus sp.
Goeldichironomus devineyae
Polypedilum sp.
Malacostraca
Amphipoda
Gammarus tigrinus
Lepidactylus dytiscus
Number of Sensitivity Abundance Product of
individualsb value (SV)` value (n) (SV)(n)
20
1.0
10
10.0
4
2.0
3
6.0
16
1.6
10
16.0
36
1.1
30
33.0
92
2.6
30
78.0
4
2.0
3
6.0
8
1.7
3
5.1
12
1.2
10
12.0
4
1.1
3
3.3
24
1.0
10
10.0
4
3.9
3
11.7
8
2.0
3
6.0
4
1.5
3
4.5
20
2.0
10
20.0
96
3.5
30
105.0
Total
Estuarine Biotic Index = 2.03
Total taxa = 19
Total taxa with sensitivity values = 15
a Only those taxa for which a sensitivity value is available are displayed.
bTotal number of individuals caught in all five ponar replicates.
° Sensitivity values provided by NCDWR.
1 -72
161 326.6