20080868 Ver 2_I-60 2015 Muddy Ponar Upstream Biotic Index Table_20160708

Table 1-60. Estuarine Biotic Index (EBI) calculations for benthic ponar samples at the Muddy Creek
upstream station in May 2015.
Species/taxona
Number of
individualsb
Sensitivity
value (SV)`
Abundance
value n
Product of
(SV)(n)
Annelida
Polychaeta
Amphicteis floridus
11
2.0
10
20.0
Eteone heteropoda
2
1.6
1
1.6
Streblospio benedecti
35
1.1
30
33.0
Arthropoda
Insecta
Diptera
Bezzia/Palpomyia complex
3
2.3
3
6.9
Chironomus decorus
149
1.0
100
100.0
Tanypus neopunctipennis
9
1.0
3
3.0
Malacostraca
Amphipoda
Apocorophium /ouisianum
1
2.2
1
2.2
Apocorophium sp.
3
2.2
3
6.6
Mollusca
Bivalvia
Macoma balthica
7
1.5
3
4.5
Macoma tenta
3
2.0
3
6.0
Mytilopsis leucophaeta
1
1.5
1
1.5
Gastropoda
Littoridinops sp.
3
2.0
3
6.0
Total
161
191.3
Estuarine Biotic Index = 1.19
Total taxa = 13
Total taxa with sensitivity values = 11
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.
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