20080868 Ver 2_I-76 2015 DCUT19 Ponar Upstream Biotic Index Table_20160708

Table 1-76. Estuarine Biotic Index (EBI) calculations for benthic ponar samples at the DCUT19
upstream station in May 2015.
Species/taxona
Number of
individualsb
Sensitivity
value (SV)`
Abundance
value n
Product of
(SV)(n)
Annelida
Oligochaeta
Tubificidae sp. w/o hair
8
1.0
3
3.0
Polychaeta
Amphicteis floridus
44
2.0
30
60.0
Laeonereis culveri
12
1.0
10
10.0
Arthropoda
Insecta
Diptera
Bezzia/Palpomyia complex
10
2.3
10
23.0
Chironomus decorus
2
1.0
1
1.0
Parachironomus sp.
2
1.1
1
1.1
Tanypus neopunctipennis
4
1.0
3
3.0
Tanytarsus sp.
18
2.3
10
23.0
Malacostraca
Amphipoda
Gammarus tigrinus
4
2.0
3
6.0
Mollusca
Gastropoda
Littoridinops sp.
36
2.0
30
60.0
Total
101
190.1
Estuarine Biotic Index = 1.88
Total taxa = 13
Total taxa with sensitivity values = 10
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 NCDW R.
-MI