20080868 Ver 2_I-54 2015 Long Ponar Downstream Biotic Index Table_20160708

Table 1-54. Estuarine Biotic Index (EBI) calculations for benthic ponar samples at the Long Creek
downstream 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
2
1.0
1
1.0
Polychaeta
Amphicteis floridus
5
2.0
3
6.0
Eteone heteropoda
19
1.6
10
16.0
Heteromastus filiformis
1
1.1
1
1.1
Mediomastus ambiseta
80
2.0
30
60.0
Streblospio benedicti
295
1.1
100
110.0
Arthropoda
Insecta
Diptera
Chironomus decorus
406
1.0
100
100.0
Tanypus neopunctipennis
35
1.0
30
30.0
Tanytarsus sp.
2
2.3
1
2.3
Malacostraca
Mysida
Americamysis almyra
2
2.2
1
2.2
Mollusca
Bivalvia
Macoma balthica
26
1.5
10
15.0
Macoma tenta
65
2.0
30
60.0
Total
317
403.6
Estuarine Biotic Index = 1.27
Total taxa = 14
Total taxa with sensitivity values = 12
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.
ffM