20080868 Ver 2_I-66 2015 Huddles Ponar Downstream Biotic Index Table_20160708

Table 1-66. Estuarine Biotic Index (EBI) calculations for benthic ponar samples at the Huddles Cut
downstream station in May 2015.
Species/taxon'
Number of
individualsb
Sensitivity
value (SV)'
Abundance
value (n)
Product of
(SV)(n)
Annelida
Polychaeta
Mediomastus ambiseta
4
2.0
3
6.0
Arthropoda
Insecta
Diptera
Cryptochironomus sp.
4
1.0
3
3.0
Malacostraca
Amphipoda
Lepidactylus dytiscus
84
3.5
30
105.0
Mollusca
Gastropoda
Littoridinops sp.
4
2.0
3
6.0
Total
39
120.0
Estuarine Biotic Index = 3.08
Total taxa = 7
Total taxa with sensitivity values = 4
' 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.
1-74