20080868 Ver 2_I-48 2014 Little Ponar Upstream Biotic Index Table_20150717

Table 1 -48. Estuarine Biotic Index (EBI) calculations for benthic ponar samples at the Little Creek
upstream station in May 2014.
Number of
Sensitivity
Abundance
Product of
Species /taxona
individualsb
value (SV)`
value (n)
(SV)(n)
Annelida
Oligochaeta
Limnodrilus hoffineisteri
4
1.0
3
3.0
Tubificidae sp. w/o hair
16
1.0
10
10.0
Polychaeta
Amphicteis floridus
58
2.0
30
60.0
Arthropoda
I nsecta
Diptera
Chironomus decorus
100
1.0
100
100.0
Goe/dichironomus devineyae
4
2.0
3
6.0
Tanypus neopunctipennis
6
1.0
3
3.0
Tanytarsus sp.
6
2.3
3
6.9
Malacostraca
Amphipoda
Gammarus tigrinus
96
2.0
30
60.0
Mollusca
Gastropoda
Littoridinops tenuipes
36
2.0
30
60.0
Physidae sp. (physalphysella)
20
1.3
10
13.0
Total
222
321.9
Estuarine Biotic Index = 1.45
Total taxa = 11
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 NCDWR.
1 -54