20080868 Ver 2_I-80 2017 DCUT11 Ponar Upstream Biotic Index Table_20180629

Table 1-80. Estuarine Biotic Index (EBI) calculations for benthic ponar samples at the DCUT11
upstream station in May 2017.
Number of Sensitivity Abundance Product of
Species/taxona individualsb value (SV)` value (n) (SV)(n)
Annelida
Polychaeta
Amphicteis floridus
Arthropoda
Insecta
Diptera
Bezzia/Palpomyia complex
Dicrotendipes nervosus
Polypedilum sp.
Tanytarsus sp.
Malacostraca
Amphipoda
Apocorophium sp.
Gammarus tigrinus
Mollusca
Bivalvia
Mytilopsis leucophaeta
Gastropoda
Littoridinops sp.
Total
Estuarine Biotic Index = 2.00
Total taxa = 12
Total taxa with sensitivity values = 9
26
2.0 10
20.0
2
2.3 1
2.3
2
1.0 1
1.0
2
1.5 1
1.5
4
2.3 3
6.9
2
2.2 1
2.2
298
2.0 100
200.0
2 1.5 1 1.5
28 2.0 10 20.0
128 255.4
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.