20080868 Ver 2_I-52 2014 Long Ponar Upstream Biotic Index Table_20150717

Table 1 -52. Estuarine Biotic Index (EBI) calculations for benthic ponar samples at the Long Creek
upstream station in May 2014.
1 -58
Number of
Sensitivity
Abundance
Product of
Species /taxona
individualsb
value (SV)`
value (n)
(SV)(n)
Annelida
Oligochaeta
Tubificidae sp. w/o hair
31
1.0
30
30.0
Polychaeta
Amphicteis floridus
25
2.0
10
20.0
Eteone heteropoda
48
1.6
30
48.0
Marenzelleria viridis
3
2.6
3
7.8
Mediomastus ambiseta
1
2.0
1
2.0
Neanthes succinea
7
1.7
3
5.1
Polydora cornuta
2
1.2
1
1.2
Streblospio benedicti
9
1.1
3
3.3
Arthropoda
Insecta
Diptera
Bezzia/Palpomyia complex
2
2.3
1
2.3
Chironomus decorus
450
1.0
100
100.0
Parachironomus sp.
4
1.1
3
3.3
Tanypus neopunctipennis
1
1.0
1
1.0
Tanytarsus sp.
1
2.3
1
2.3
Malacostraca
Amphipoda
Apocorophium louisianum
5
2.2
3
6.6
Apocorophium sp.
42
2.2
30
66.0
Gammarus mucronatus
54
2.3
30
69.0
Gammarus tigrinus
2
2.0
1
2.0
Isopoda
Edotia montosa
2
2.6
1
2.6
Tanaidacea
Hargeria rapax
6
1.6
3
4.8
Maxillopoda
Sessilia
Balanus sp.
2
2.0
1
2.0
Mollusca
Bivalvia
Macoma balthica
1
1.5
1
1.5
Macoma tenta
9
2.0
3
6.0
Gastropoda
Littoridinops tenuipes
1
2.0
1
2.0
Total
261
388.8
Estuarine Biotic Index = 1.49
Total taxa = 25
Total taxa with sensitivity values = 23
a Only those taxa for which a sensitivity value is available are displayed.
b Total number of individuals caught in all five ponar
replicates.
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Sensitivity values provided by NCDWR.
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