20080868 Ver 2_I-80 2015 DCUT11 Ponar Upstream Biotic Index Table_20160708

Table 1-80. Estuarine Biotic Index (EBI) calculations for benthic ponar samples at the DCUT11
upstream station in Mav 2015.
Species/taxona
Number of
individualsb
Sensitivity
value (SV)`
Abundance
value n
Product of
(SV)(n)
Annelida
Oligochaeta
Tubificidae sp. (w/o hair)
2
1.0
1
1.0
Polychaeta
Amphicteis floridus
63
2.0
30
60.0
Arthropoda
Insecta
Coleoptera
Berosus sp.
42
1.5
30
45.0
Diptera
Bezzia/Palpomyia complex
1
2.3
1
2.3
Chironomus decorus
2
1.0
1
1.0
Dicrotendipes nervosus
4
1.0
3
3.0
Goeldichironomus devineyae
6
2.0
3
6.0
Parachironomus sp.
1
1.1
1
1.1
Procladius sp.
1
1.2
1
1.2
Tanytarsus sp.
1
2.3
1
2.3
Odonata
Erythemis sp.
1
1.0
1
1.0
Tricoptera
Oecetis sp.
1
2.5
1
2.5
Malacostraca
Amphipoda
Gammarus tigrinus
7
2.0
3
6.0
Isopoda
Cassidinidea lunifrons
3
2.0
3
6.0
Mollusca
Gastropoda
Littoridinops sp.
464
2.0
100
200.0
Total
180
338.4
Estuarine Biotic Index = 1.88
Total taxa = 18
Total taxa with sensitivity values = 14
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.
::