20080868 Ver 2_I-44 2014 Drinkwater Ponar Upstream Biotic Index Table_20150717

Table 1 -44 Estuarine Biotic Index (EBI) calculations for benthic ponar samples at the Drinkwater
Creek upstream station in May 2014.
Total 401 638.6
Estuarine Biotic Index = 1.59
Total taxa = 22
Total taxa with sensitivity values = 20
a Only those taxa for which a sensitivity value is available are displayed.
b Total number of individuals caught in all five ponar replicates.
Sensitivity values provided by NCDWR.
1 -50
Number of
Sensitivity
Abundance
Product of
Species /taxona
individualsb
value (SV)`
value (n)
(SV)(n)
Annelida
Oligochaeta
Tubificidae sp. w/o hair
69
1.0
30
30.0
Polychaeta
Amphicteis floridus
96
2.0
30
60.0
Laeonereis culveri
21
1.0
10
10.0
Streblospio benedicti
3
1.1
3
3.3
Arthropoda
Insecta
Diptera
Bezzia/Palpomyia complex
21
2.3
10
23.0
Chironomus decorus
358
1.0
100
100.0
Cricotopus sp.
27
1.4
10
14.0
Dicrotendipes nervosus
6
1.0
3
3.0
Goeldichironomus devineyae
54
2.0
30
60.0
Parachironomus sp.
48
1.1
30
33.0
Tanypus neopunctipennis
3
1.0
3
3.0
Tanytarsus sp.
27
2.3
10
23.0
Malacostraca
Amphipoda
Apocorophium sp.
30
2.2
30
66.0
Gammarus mucronatus
42
2.3
30
69.0
Gammarus tigrinus
63
2.0
30
60.0
Isopoda
Cassidinidea lunifrons
3
2.0
3
6.0
Tanaidacea
Hargeria rapax
3
1.6
3
4.8
Maxillopoda
Sessilia
Balanus sp.
3
2.0
3
6.0
Mollusca
Bivalvia
Mytilopsis leucophaeata
6
1.5
3
4.5
Gastropoda
Littoridinops tenuipes
60
2.0
30
60.0
Total 401 638.6
Estuarine Biotic Index = 1.59
Total taxa = 22
Total taxa with sensitivity values = 20
a Only those taxa for which a sensitivity value is available are displayed.
b Total number of individuals caught in all five ponar replicates.
Sensitivity values provided by NCDWR.
1 -50