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Home My WebLink About20080868 Ver 2_I-1 thru I-28 Sweeps_20190628Table 1-1. Raw data from benthic sweep samples collected in May 2018 at each station in all 13 creeks in the PCS study. Taxonomic hierarchy Jacks Creek Little Creek (control) Jacobs Creek PA2 control Drinkwater Creek Long Creek control Tooley Creek Muddy Creek control Huddles Cut Porter Creek DCUT11 DCUT19 (control) Duck Creek (control) Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Annelida Hirudinea Piscicolidae Myzobdella lugubris - 2 - - 6 2 - - 3 - 3 - 24 6 - 1 2 - - Clitellata Enchytraeidae sp. 22 2 3 82 3 20 28 5 - 2 - 1 31 2 1 - 1 3 6 - 8 Naididae Naididae sp. w/ hair - - - - - - - - - - - - - 1 - Naididae sp. w/o hair 12 4 56 14 16 50 18 2 - - - 1 6 7 1 12 - 27 7 Limnodrilus hoffineisteri - - 45 - 6 - 9 - 1 - - 4 - - Nais sp. - - - - - - - - - - - - - - - 104 Paranais litoralis 116 1 3 3 6 3 - - 3 12 1 3 - 1 5 28 272 16 Tubificoides heterochaetus - 1 - - - - - 2 4 1 - - - - 29 4 - - Polychaeta Ampharetidae Amphicteis floridus 4 2 42 24 22 230 105 7 38 5 - 64 5 2 - 14 218 21 10 4 2 1 Capitellidae Heteromastus flliformis - - - - - - - 1 - 17 1 - - Mediomastus ambiseta 1 - 1 - 6 - - - 2 Nereididae Laeonereis culveri - 6 8 22 13 - - 3 - - - 3 - Neanthes succinea - - - 1 1 - 1 2 2 - Orbiniidae Leitoscoloplos fragilis - - - - - - - 1 - - - Phyllodocidae Eteone heteropoda 12 - 18 2 2 2 1 13 1 3 - 1 - - 4 5 2 - Spionidae Marenzelleria viridis - 1 4 - - 9 - 2 - - 1 - 23 6 6 - 2 - 8 Polydora cornuta 16 1 3 5 9 2 9 14 11 2 3 1 - 2 - 9 3 - - - 4 3 Streblospio benedicti - - - - 3 - 3 4 - 10 - 2 5 17 - 3 - 1 Arthropoda Arachnida Acari sp. 7 - 2 - - - - 4 - 1 26 - - Collembola Collembola sp. - - - - - 1 - - - 2 Sminthuridae sp. 4 4 1 3 - 6 1 - 10 2 2 18 Neanuridae Anurida maritima - 2 - - 2 - 25 - Insecta Coleoptera Gyrinidae Dineutus carolinus - - - - - - - 2 - Hydrophilidae Berosus sp. 6 2 46 10 2 50 2 2 5 2 20 21 14 32 18 2 Tropisternus quadristriatus quadristriatus - - - - - - - - - 1 - - - - - 2 Tropisternus sp. - 3 - - - - Haliplidae Peltodytes sp. 9 1 1 1 1 1 - I I 1 1 3 1 1 1 4 - 1 2 2 1 4 1-1 Table 1-1 (continued) Taxonomic hierarchy Jacks Creek Little Creek (control) Jacobs Creek PA2 (control) Drinkwater Creek Long Creek (control) Tooley Creek Muddy Creek (control) Huddles Cut Porter Creek DCUT11 DCUT19 (control) Duck Creek (control) Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Diptera Ceratopogonidae —+ Bezzia/Palpomyia complex 14 14 - 8 6 2 1 4 2 3 6 2 43 23 57 7 2 - Dasyhelea sp. - - 2 - - - - - - - - - - - - - - - - - - Chironomidae Chironomus decorus 266 23 52 1 107 252 134 300 228 124 200 3 197 28 233 100 1 4 6 6 - 5 59 - 64 Corynoneura sp. - - - - - - - - - - - - - - - - - 3 - - - Cricotopus sp. 110 2 1 1 - - 8 12 152 - 35 1 - 18 - - - 3 2 Dicrotendipes nervosus 4 1 42 - - 22 3 - 1 6 5 - 1 - 51 78 7 149 7 Dolichopodidae Dolichopodidae sp. - - - - 11 - - - - - - - - - - - - Goeldichironomus devineyae 162 2 1 146 87 172 192 138 51 34 2 13 14 206 94 7 1 17 32 7 - 84 40 - 107 Orthocladiinae sp. - - 1 - - - - - - - - - - 2 3 - - - 4 - - 1 - Parachironomus sp. 12 2 - 2 2 4 31 31 3 1 7 2 13 2 - 1 - 1 3 4 Polypedilum sp. - 1 - - - - - - - - - - - - - Procladius sp. - - - - - - - - 3 - Tanypus neopunctipennis 20 2 - - - - - - - - - - - - - - - - - Tanytarsus sp. 272 33 2 5 2 6 9 1 3 88 6 1 2 9 5 36 1 5 120 164 30 45 31 5 Ephydridae Ephydridae sp. - - - - - - - - - - 2 - - - - - - - - - Tabanidae Tabanus sp. 4 2 - - - 2 Hemiptera Belostomatidae Abedus/Belostoma complex - - 8 1 10 - - - 14 Belostoma flumineum 3 - - 9 2 2 Belostoma lutarium - - 2 Belostoma sp. - - - 2 - - - - - Corixidae Corixidae sp. 18 7 2 2 2 3 2 2 3 4 11 2 Trichocorixa sexcincta 4 - 1 - 2 - - - Mesoveliidae Mesovelia mulsand 2 2 - - Nepidae Pelocoris femoratus 1 2 5 1 2 1 9 - Ranatra australis - - - - - - - - 1 Ranatra kirkaldyi - 1 - - Ranatra nigra 1 - 2 Veliidae Platyvelia brachialis 2 - Odonata Aeshnidae Nasiaeschna pentacantha - 1 - - - - - - - - - Coenagrionidae Enallagma sp. 4 4 1 2 2 3 1 - 12 - - 5 13 4 Ischnura sp. - - - - - - - 3 - - - Libellulidae Libellulidae sp. 4 - - Libellula semifasciata - - - - 3 - - Libellula sp. 1 4 3 - 10 1 2 2 2 Perithemis tenera 2 - - 2 - - - - 2 1-2 Table 1-1 (continued) Taxonomic hierarchy Jacks Creek Little Creek (control) Jacobs Creek PA2 (control) Drinkwater Creek Long Creek (control) Tooley Creek Muddy Creek (control) Huddles Cut Porter Creek DCUT11 DCUT19 (control) Duck Creek (control) Up Down U Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Malacostraca Amphipoda Corophiidae Apocorophium lacustre 12 3 31 - 6 - - 3 - - 3 2 - 1 7 10 9 129 24 10 48 - - 27 Apocorophium louisianum 50 12 6 142 203 172 282 284 92 25 21 28 33 181 150 27 1 - 30 - - 64 34 - Apocorophium sp. 120 67 77 300 300 216 300 300 193 206 22 191 96 300 295 78 6 42 100 18 41 300 223 1 36 Gammaridae Gammarus mucronatus - 127 20 2 234 - 61 - 192 4 257 24 105 9 110 11 83 - 120 - - - - - 1 Gammarustigrinus 300 300 300 155 32 300 100 296 254 249 234 245 54 213 300 300 42 300 300 300 300 300 227 300 300 300 Haustoriidae Lepidactylus dytiscus - - - - - - - - - 1 - - - - - - - 2 - - - - - - - - Oedicerotidae Ameroculodes complex - - 1 3 - Talitridae Uhlorchestia uhled 1 - - 2 Decapoda Cambaridae Cambarus sp. - 1 Procambarus sp. - - 5 - - - - - - - - - - - - - - - - - - - - Palaemonidae Palaemonetes pugio 10 54 - 47 9 84 10 3 3 40 4 86 88 85 91 11 79 41 31 28 13 24 - 36 - 38 Panopeidae Rhithropanopeus harrisii - 2 - - 2 - - - - - 1 - 2 - - 2 1 - 4 - - - - Isopoda Anthuridae Cyathura polita 4 - - - 4 21 59 28 3 1 8 2 8 - - 5 2 4 6 3 2 Bopyridae Probopyrus pandalicola - - 2 - - 6 6 - - - - - Idoteidae Edotia montosa - 2 - - - 2 - - - 4 - 1 3 3 - - - 2 - - - 14 1 Sphaeromatidas Cassidinidea lunifrons 20 4 12 3 24 11 6 42 39 6 8 - 3 6 48 12 41 64 55 9 7 3 17 38 Mysida Mysidae Americamysis almyra 16 180 - 6 - 2 - - 2 - 4 6 2 2 - 2 - - - - - - 52 Tanaidacea Leptocheliidae Hargenarapax - 116 236 16 2 206 - 126 145 164 1 4 66 66 122 Maxillopoda Arguloida Argulidae Argulus sp. - - - - - 1 - - - - - - - S essila Balanidae Balanus improvisus 4 6 68 2 13 35 34 19 102 15 6 62 91 - 20 13 1 49 Balanus lutarium - - - - - - - - - - - - - 2 - - - Ostracoda Candonidae Candonidae sp. 116 2 6 - 3 3 4 - 9 14 - - - - 11 6 - 18 2 180 10 2 Cytherideidae Cyprideis littoralis 102 1 241 3 - - 46 3 - 13 3 15 3 5 116 2 112 300 300 40 22 251 1-3 Table 1-1 (concluded) Taxonomic hierarchy Jacks Creek Little Creek (control) Jacobs Creek PA2 (control) Drinkwater Creek Long Creek (control) Tooley Creek Muddy Creek (control) Huddles Cut Porter Creek DCUT11 DCUT19 (control) Duck Creek (control) Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Cnidaria Anthozoa Actiniaria sp. 6 3 Mollusca Bivalvia Bivalvia sp. 8 1 10 10 2 4 3 2 6 4 1 1 Cyrenoididae Cyrenoida floridana - - - - - - - - 1 - - - - - - - Dreissenidae Mytilopsis leucophaeata - 100 1 2 2 4 3 3 1 8 4 2 11 Mactridae Rangia cuneata 2 - - - - - - - - - - - - - - Mytilidae Geukensia demissa - - 2 - - 3 3 2 1 - - 1 - 1 Tellinidae Macoma balthica 1 3 10 4 4 4 - 2 - 7 1 1 22 4 2 2 3 - Macoma tenta - - - - - - - - - - - - - - - 1 6 - - - - - - - - - Gastropoda Hydrobiidae Littoridinops sp. 300 208 41 192 300 284 300 260 220 204 300 124 300 195 300 300 63 7 183 242 300 300 300 252 194 300 Physidae Ph sidae s h sa/ h sella - - 2 - - - - - - - - - - - - - - - - - - - - - 3 1 Platyhelminthes Plat helminthes sp. - 2 - - - - - 2 3 - - Total taxa 30 32 27 21 21 30 24 30 26 30 1 32 27 30 24 39 31 29 26 29 18 28 19 25 26 27 32 — = Species not collected at station 1-4 Table 1-2. Taxa collected in May 2018 from each benthic sweep sample station in all 13 creeks in the PCS study. Taxa for which EBI was calculated are shown with a * and other taxa are shown with a V. Taxonomic hierarchy Jacks Creek Little Creek (control) Jacobs Creek PA2 control Drinkwater Creek Long Creek control Tooley Creek Muddy Creek control Huddles Cut Porter Creek DCUT11 DCUT19 (control) Duck Creek (control) Up Down Up Down Up Down U Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Annelida Hirudinea Piscicolidae Myzobdella lugubris ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Clitellata Enchytraeidae sp. * * * * * * * Naididae Naididae sp. w/ hair Naididae sp. w/o hair * * * * * Limnoddlus hoffineisteri Nais sp. Paranais litoralis * * * * * Tubificoides heterochaetus Polychaeta Ampharetidae Amphicteis floridus * * * * * * * * * * Capitellidae Heteromastus filiformis Mediomastus ambiseta Nereididae Laeonereis culveri Neanthes succinea Orbiniidae Leitoscoloplos fragilis Phyllodocidae Eteone heteropoda * * * Spionidae Marenzelleria viridis Polydora cornuta * * * * * * * Streblos io benedicti Arthropoda Arachnida Acari sp. ✓ ✓ ✓ ✓ ✓ Collembola Collembola sp. ✓ ✓ Sminthuridae sp. ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Neanuridae Anudda maritima ✓ ✓ ✓ Insecta Coleoptera Gyrinidae Dineutus carolinus ✓ Hydrophilidae Berosus sp. * * * * * * Tropistemus quadristriatus quadristriatus Tropistemus sp. Haliplidae Peltodytes sp. 1-5 Table 1-2 (continued). Taxonomic hierarchy Jacks Creek Little Creek (control) Jacobs Creek PA2 (control) Drinkwater Creek Long Creek (control) Tooley Creek Muddy Creek (control) Huddles Cut Porter Creek DCUT11 DCUT19 (control) Duck Creek control (control) Up Down Up Down Up Down Up I Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Diptera * Ceratopogonidae Bezzia/Palpomyia complex * * * * * Dasyhelea sp. ✓ Chironomidae Chironomus decorus * * * * * * * * * * * * * Corynoneura sp. Cricotopus sp. * * Dicrotendipes nervosus * * * * Dolichopodidae Dolichopodidae sp. Goeldichironomus devineyae * * * * * * * * * * * * * Orthocladiinae sp. ✓ ✓ ✓ ✓ ✓ Parachironomus sp. * * * * * * * Polypedilum sp. Procladius sp. Tanypus neopunctipennis Tanytarsus sp. * * * * * * * * * * * * * Ephydridae Ephydridae sp. ✓ Tabanidae Tabanussp. Hemiptera Belostomatidae Abedus/Belostoma complex Belostoma flumineum ✓ ✓ ✓ ✓ Belostoma lutarium ✓ Belostomasp. Corixidae Corixidae sp. * * Trichocorixa sexcintca Mesoveliidae Mesovelia mulsanti ✓ ✓ Nepidae Pelocoris femoratus Ranatra australis Ranatra kirkaldyi Ranatra nigra Veliidae Platyvelia brachialis ✓ Odonata Aeshnidae Nasiaeschna pentacantha ✓ Coenagrionidae Enallagma sp. * Ischnura sp. Libellulidae Libellulidae sp. ✓ Libellula semifasciata ✓ Libellula sp. Perithemis tenera ✓ ✓ ✓ Table 1-2 (continued). Taxonomic hierarchy Jacks Creek Little Creek (control) Jacobs Creek PA2 (control) Drinkwater Creek Long Creek (control) Tooley Creek Muddy Creek (control) Huddles Cut Porter Creek DCUT11 DCUT19 (control) Duck Creek control (control) Up Down Up Down Up Down Up I Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Malacostraca * Amphipoda Corophiidae Apocorophium lacustre * * * * * Apocorophium louisianum * * * * * * * * * * Apocorophium sp. * * * * * * * * * * * * * * * Gammaridae Gammarus mucronatus * * * * * * Gammarus tigrinus * * * * * * * * * * * * * * * * Haustoriidae Lepidactylus dytiscus Oedicerotidae Ameroculodes complex Talitridae Uhlorchestia uhleri Decapoda Cambaridae Cambarus sp. ✓ Procambarus sp. Palaemonidae Palaemonetes pugio * * * * * * * * * * * * * Panopeidae Rhithropanopeus harrisii Isopoda Anthuridae Cyathura polita * * * * * * Bopyridae Probopyrus pandalicola ✓ ✓ ✓ Idoteidae Edotia montosa Sphaeromatidae Cassidinidea lunifrons * * * * * * * * * * * * * Mysida Mysidae Americamysis almyra * Tanaidacea Leptocheliidae Hargeria rapax * * * Maxillopoda Arguloida Argulidae Ar ulus sp. ✓ Sessila Balanidae Balanus improvisus * * * * * * * Balanus lutarium ✓ Ostracoda Candonidae Candonidae sp. ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Cytherideidae Cyprideis littoralis ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ 1-7 Table 1-2 (concluded). Taxonomic hierarchy Jacks Creek Little Creek (control) Jacobs Creek PA2 (control) Drinkwater Creek Long Creek (control) Tooley Creek Muddy Creek (control) Huddles Cut Porter Creek DCUT11 DCUT19 (control) Duck Creek (control) control Up Down Up Down Up Down Up I Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Up Down Cnidaria Anthozoa Actiniaria sp. ✓ ✓ Molluscs Bivalvia Bivalvia sp. ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Cyrenoididae Cyrenoida floridana ✓ Dreissenidae Mytilopsis leucophaeata * * Mactridae Rangia cuneata Mytilidae Geukensia demissa Tellinidae Macoma balthica * * * * * Macoma tents Gastropoda Hydrobiidae Littoridinops sp. * * * * * * * * * * * * * * * * Physidae Ph sidae s h sa/ h sells Platyhelminthes Platyhelminthes sp. ✓ ✓ ✓ Total taxa 30 32 27 21 21 30 24 30 26 30 32 27 30 24 39 31 29 26 29 18 28 19 25 26 27 32 — = Species not collected at station M. Table 1-3. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Jacks Creek upstream station in May 2018. S ecies/taxona Number of individualsb Sensitivity value SV ` Abundance value n Product of SV n Annelida Clitellata Enchytraeidae sp. 22 1.0 10 10.0 Naididae sp. w/o hair 12 1.0 10 10.0 Paranais litoralis 116 1.1 100 110.0 Polychaeta Amphicteis floridus 4 2.0 3 6.0 Eteone heteropoda 12 1.6 10 16.0 Polydora cornuta 16 1.2 10 12.0 Arthropoda Insecta Coleoptera Berosus sp. 6 1.5 3 4.5 Diptera Bezzia/Palmonyia complex 14 2.3 10 23.0 Chironomus decorus 266 1.0 100 100.0 Cricotopus sp. 110 1.4 100 140.0 Dicrotendipes nervosus 4 1.0 3 3.0 Goeldichironomus devineyae 162 2.0 100 200.0 Parachironomus sp. 12 1.1 10 11.0 Tabanus sp. 4 1.4 3 4.2 Tanypus neopunctipennis 20 1.0 10 10.0 Tanytarsus sp. 272 2.3 100 230.0 Hemiptera Corixidae sp. 18 1.3 10 13.0 Trichocorixa sexcincta 4 1.0 3 3.0 Odonata Enallagma sp. 4 1.5 3 4.5 Malacostraca Amphipoda Apocorophium lacustre 12 2.2 10 22.0 Apocorophium louisianum 50 2.2 30 66.0 Apocorophium sp. 120 2.2 100 220.0 Gammarus tigrinus 300 2.0 100 200.0 Decapoda Palaemonetes pugio 10 2.5 10 25.0 Isopoda Cassidinidea lunifrons 20 2.0 10 20.0 Cyathura polita 4 2.0 3 6.0 Mysida Americamysis almyra 16 2.2 10 22.0 Mollusca Gastropoda Littoridinops sp. 300 2.0 100 200.0 Total I 1 971 1,691.2 Estuarine Biotic Index = 1.74 Total taxa = 30 Total taxa with sensitivitv values = 25 80nly those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. °Sensitivity values provided by NCDWR. 1-9 Table 1-4. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Jacks Creek downstream station in May 2018. S ecies/taxona Number of individualsb Sensitivity value SV ` Abundance value n Product of SV n Annelida Clitellata Enchytraeidae sp. 2 1.0 1 1.0 Naididae sp. w/o hair 4 1.0 3 3.0 Paranais litoralis 1 1.1 1 1.1 Tubificoides heterochaetus 1 1.1 1 1.1 Polychaeta Amphecteis floridus 2 2.0 1 2.0 Marenzelleria viridis 1 2.6 1 2.6 Mediomastus ambiseta 1 2.0 1 2.0 Polydora cornuta 1 1.2 1 1.2 Arthropoda Insecta Coleoptera Berosus sp. 2 1.5 1 1.5 Diptera Chironomus decorus 23 1.0 10 10.0 Cricotopus sp. 2 1.4 1 1.4 Dicrotendipes nervosus 1 1.0 1 1.0 Goeldichironomus devineyae 2 2.0 1 2.0 Parachironomus sp. 2 1.1 1 1.1 Polypedilum sp. 1 1.5 1 1.5 Malacostraca Amphipoda Apocophorium lacustre 3 2.2 3 6.6 Apocorophium louisianum 12 2.2 10 22.0 Apocophorium sp. 67 2.2 30 66.0 Gammarus mucronatus 127 2.3 100 230.0 Gammarus tigrinus 300 2.0 100 200.0 Decapoda Palaemonetes pugio 54 2.5 30 75.0 Rhithropanopeus harrisii 2 2.5 1 2.5 Isopoda Cassidinidea lunifrons 4 2.0 3 6.0 Edotia montosa 2 2.6 1 2.6 Mysida Americamysis almyra 180 2.2 100 220.0 Tanaidacea Hargeria rapax 116 1.6 100 160.0 Maxillopoda Sessila Balanus improvisus 4 2.0 3 6.0 Mollusca Bivalvia Macoma balthica 1 1.5 1 1.5 Rangia cuneata 2 1.0 1 1.0 Gastropoda Littoridinops sp. 208 2.0 100 200.0 Total 609 1,231.7 Estuarine Biotic Index = 2.02 Total taxa = 32 Total taxa with sensitivitv values = 28 'Only those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. 'Sensitivity values provided by NCDWR. IM Table 1-5. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Little Creek upstream station in May 2018. Species/taxona Number of individualsb Sensitivity value SV ` Abundance value n Product of SV n Annelida Clitellata Enchytraeidae sp. 3 1.0 3 3.0 Limnodrilus hoffineisteri 45 1.0 30 30.0 Naididae sp. w/o hair 56 1.0 30 30.0 Paranais litoralis 3 1.1 3 3.3 Polychaeta Amphicteis floridus 42 2.0 30 60.0 Laeoenreis culveri 6 1.0 3 3.0 Arthropoda Insecta Coleptera Peltodytes sp. 9 1.4 3 4.2 Diptera Bezzia/Palpomyia complex 14 2.3 10 23.0 Chironomus decorus 52 1.0 30 30.0 Cricotopus sp. 1 1.4 1 1.4 Dicrotendipes nervosus 42 1.0 30 30.0 Tanypus neopunctipennis 2 1.0 1 1.0 Tanytarsus sp. 33 2.3 30 69.0 Hemiptera Corixidae sp. 7 1.3 3 3.9 Pelocoris femoratus 1 2.3 1 2.3 Odonata Enallagma sp. 4 1.5 3 4.5 Libellula sp. 1 1.1 1 1.1 Malacostraca Amphipoda Gammarus tigrinus 300 2.0 100 200.0 Uhlorchestia uhleri 1 2.0 1 2.0 Decapoda Procambarus sp. 5 1.7 3 5.1 Isopoda Cassidinidea lunifrons 12 2.0 10 20.0 Mollusca Bivalvia Mytilopsis leucophaeata 100 1.5 100 150.0 Gastropoda Littoridinops sp. 41 2.0 30 60.0 Physidae sp. (physa/physella) 2 1.3 1 1.3 Total 457 738.1 Estuarine Biotic Index = 1.62 Total taxa = 27 Total taxa with sensitivitv values = 23 aOnly those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. `Sensitivity values provided by NCDWR. BE Table 1-6. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Little Creek downstream station in May 2018. S ecies/taxona Number of Sensitivity individualsb value SV)` Abundance value n Product of (SV)(n) Annelida Clitellata Paranais litoralis 3 1.1 3 3.3 Polychaeta Polydora cornuta 3 1.2 3 3.6 Arthropoda Insecta Diptera Chironomus decorus 1 1.0 1 1.0 Cricotopus sp. 1 1.4 1 1.4 Goeldichironomus devineyae 1 2.0 1 2.0 Hemiptera Pelocoris femoratus 2 2.3 1 2.3 Odonata Enallagma sp. 1 1.5 1 1.5 Malacostraca Apocorophium lacustre 31 2.2 30 66.0 Apocorophium louisianum 6 2.2 3 6.6 Apocorophium sp. 77 2.2 30 66.0 Gammarus mucronatus 20 2.3 10 23.0 Gammarus tigrinus 155 2.0 100 200.0 Decapoda Palaemonetes pugio 47 2.5 30 75.0 Isopoda Cassidinidea lunifrons 3 2.0 3 6.0 Mysida Americamysis almyra 6 2.2 3 6.6 Maxillopoda Sessilia Balanus improvisus 6 2.0 3 6.0 Mollusca Bivalvia Mytilopsis /eucophaeata 1 1.5 1 1.5 Gastropoda Littoridinops sp. 192 2.0 100 200.0 Total 324 671.8 Estuarine Biotic Index = 2.07 Total taxa = 21 Total taxa with sensitivitv values = 17 aOnly those taxa for which a sensitivity value is available are displayed TTotal number of individuals caught in all three sweep replicates. °Sensitivity values provided by NCDWR. 1-12 Table 1-7. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Jacobs Creek upstream station in May 2018. S ecies/taxona Number of individuals" Sensitivity value SV ` Abundance value n Product of SV n Annelida Clitellata Enchytraeidae sp. 82 1.0 30 30.0 Naididae sp. w/o hair 14 1.0 10 10.0 Paranais litoralis 6 1.1 3 3.3 Polychaeta Laeoenreis culveri 8 1.0 3 3.0 Polydora cornuta 5 1.2 3 3.6 Arthropoda Insecta Coleoptera Berosus sp. 46 1.5 30 45.0 Diptera Chironomus decorus 107 1.0 100 100.0 Dolichopodidae sp. 11 1.0 10 10.0 Goeldichironomus devineyae 146 2.0 100 200.0 Parachironomus sp. 2 1.1 1 1.1 Tanytarsus sp. 2 2.3 1 2.3 Malacostraca Amphipoda Apocorophium louisianum 142 2.2 100 220.0 Apocorophium sp. 300 2.2 100 220.0 Gammarus mucronatus 2 2.3 1 2.3 Gammarus tigrinus 32 2.0 30 60.0 Decapoda Palaemonetes pugio 9 2.5 3 7.5 Isopoda Cassidinidea lunifrons 24 2.0 10 20.0 Mollusca Bivalvia Macoma balthica 3 1.5 3 4.5 Gastropoda Littoridinops sp. 300 2.0 100 200.0 Total 638 1,142.6 Estuarine Biotic Index = 1.79 Total taxa = 21 Total taxa with sensitivity values = 17 'Only those taxa for which a sensitivity value is available are displayed. bTotal number of individuals caught in all three sweep replicates. Sensitivity values provided by NCDWR. 1-13 Table 1-8. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Jacobs Creek downstream station in May 2018. Species/taxona Number of individualsb Sensitivity value SV ° Abundance value (n) Product of SV n Annelida Clitellata Enchytraeidae sp. 3 1.0 3 3.0 Paranais litoralis 3 1.1 3 3.3 Polychaeta Amphicteis floridus 24 2.0 10 20.0 Eteone heteropoda 18 1.6 10 16.0 Marenzellaria viridis 4 2.6 3 7.8 Polydora cornuta 9 1.2 3 3.6 Streblospio benedicti 3 1.1 3 3.3 Arthropoda Insecta Coleoptera Peltodytes sp. 1 1.4 1 1.4 Diptera Chironomus decorus 252 1.0 100 100.0 Dicrotendipes nervosus 22 1.0 10 10.0 Goeldichironomus devineyae 87 2.0 30 60.0 Parachironomus sp. 2 1.1 1 1.1 Tanytarsus sp. 5 2.3 3 6.9 Malacostraca Amphipoda Apocorophium lacustre 6 2.2 3 6.6 Apocorophium louisianum 203 2.2 100 220.0 Apocorophium sp. 300 2.2 100 220.0 Gammarus mucronatus 234 2.3 100 230.0 Gammarus tigrinus 300 2.0 100 200.0 Decapoda Palaemonetes pugio 84 2.5 30 75.0 Rhithropanopeus harrisii 2 2.5 1 2.5 Isopoda Cassidinidea lunifrons 11 2.0 10 20.0 Edotia montosa 2 2.6 1 2.6 Mysida Americamysis almyra 2 2.2 1 2.2 Maxillopoda Sessilia Balanus improvisus 68 2.0 30 60.0 Tanaidacea Hargeria rapax 236 1.6 100 160.0 Mollusca Bivalvia Geukensia demissa 2 3.4 1 3.4 Macoma balthica 10 1.5 10 15.0 Mytilopsis leucophaeata 2 1.5 1 1.5 Gastropoda Littoridinops sp. 284 2.0 100 200.0 Total 868 1,655.2 Estuarine Biotic Index = 1.91 Total taxa = 30 Total taxa with sensitivitv values = 28 aOnly those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. `Sensitivity values provided by NCDWR. 1-14 Table 1-9. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the PA2 Creek upstream station in May 2018. S ecies/taxona Number of individualsb Sensitivity value SV ` Abundance value (n) Product of (SV)(n Annelida Clitellata Enchytraeidae sp. 20 1.0 10 10.0 Limnodrilus hoffineisteri 6 1.0 3 3.0 Naididae sp. w/o hair 16 1.0 10 10.0 Polychaeta Amphicteis floridus 22 2.0 10 20.0 Laeonereis culveri 22 1.0 10 10.0 Polydora cornuta 2 1.2 1 1.2 Arthropoda Insecta Coleoptera Berosus sp. 10 1.5 10 15.0 Diptera Bezzia/Palpomyia complex 8 2.3 3 6.9 Chironomus decorus 134 1.0 100 100.0 Goeldichironomus devineyae 172 2.0 100 200.0 Parachironomus sp. 4 1.1 3 3.3 Tanytarsus sp. 2 2.3 1 2.3 Hemiptera Corixidae sp. 2 1.3 1 1.3 Odonata Libellula sp. 4 1.1 3 3.3 Malacostraca Amphipoda Apocorophium louisianum 172 2.2 100 220.0 Apocorophium sp. 216 2.2 100 220.0 Gammarus tigrinus 100 2.0 100 200.0 Decapoda Palaemonetes pugio 10 2.5 10 25.0 Isopoda Cassidinidea lunifrons 6 2.0 3 6.0 Cyathura polita 4 2.0 3 6.0 Mollusca Bivalvia Macoma balthica 4 1.5 3 4.5 Mytilopsis leucophaeata 2 1.5 1 1.5 Gastropoda Littoridinops sp. 300 2.0 100 200.0 Total 685 1,269.3 Estuarine Biotic Index = 1.85 Total taxa = 24 Total taxa with sensitivitv values = 21 aOnly those taxa for which a sensitivity value is available are displayed b Total number of individuals caught in all three sweep replicates. °Sensitivity values provided by NCDWR. 1-15 Table 1-10. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the PA2 Creek downstream station in May 2018. Species/taxona Number of individualsb Sensitivity value (SV)` Abundance Product of value (n) (SV)(n) Annelida Clitellata Enchytraeidae sp. 28 1.0 10 10.0 Naididae sp. w/o hair 50 1.0 30 30.0 Tubificoides heterochaetus 2 1.1 1 1.1 Polychaeta Amphicteis floridus 230 2.0 100 200.0 Eteone heteropoda 2 1.6 1 1.6 Laeonereis culveri 13 1.0 10 10.0 Polydora cornuta 9 1.2 3 3.6 Streblospio benedicti 3 1.1 3 3.3 Arthropoda Insecta Coleoptera Berosus sp. 2 1.5 1 1.5 Diptera Bezzia/Palpomyia complex 6 2.3 3 6.9 Chironomus decorus 300 1.0 100 100.0 Goeldichironomus devineyae 192 2.0 100 200.0 Parachironomus sp. 31 1.1 30 33.0 Tanytarsus sp. 6 2.3 3 6.9 Odonata Enallagma sp. 2 1.5 1 1.5 Libellula sp. 3 1.1 3 3.3 Malacostraca Amphipoda Apocorophium louisianum 282 2.2 100 220.0 Apocorophium sp. 300 2.2 100 220.0 Gammarus mucronatus 61 2.3 30 69.0 Gammarus tigrinus 296 2.0 100 200.0 Decapoda Palaemonetes pugio 3 2.5 3 7.5 Isopoda Cassidinidea lunifrons 42 2.0 30 60.0 Cyathura polita 21 2.0 10 20.0 Maxillopoda Sessilia Balanus improvisus 2 2.0 1 2.0 Tanaidacea Hargeria rapax 16 1.6 10 16.0 Mollusca Bivalvia Macoma balthica 4 1.5 3 4.5 Mytilopsis leucophaeata 4 1.5 3 4.5 Gastropoda Littoridinops sp. 260 2.0 100 200.0 Total 889 1,636.2 Estuarine Biotic Index = 1.84 Total taxa = 30 Total taxa with sensitivitv values = 26 aOnly those taxa for which a sensitivity value is available are displayed. bTotal number of individuals caught in all three sweep replicates. 'Sensitivity values provided by NCDWR. 1-16 Table 1-11. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Drinkwater Creek upstream station in Mav 2018. Species/taxon' Number of individuals Sensitivity Abundance value (SV)` value (n) Product of (SV)(n) Annelida Clitellata Enchytraeidae sp. 5 1.0 3 3.0 Limnodrilus hoffineisteri 9 1.0 3 3.0 Naididae sp. w/o hair 18 1.0 10 10.0 Tubificoides heterochaetus 4 1.1 3 3.3 Polychaeta Amphicteis floridus 105 2.0 100 200.0 Polydora cornuta 14 1.2 10 12.0 Streblospio benedicti 4 1.1 3 3.3 Arthropoda Insecta Coleoptera Berosus sp. 50 1.5 30 45.0 Diptera Bezzia/Palmonyia complex 2 2.3 1 2.3 Chironomus decorus 228 1.0 100 100.0 Cricotopus sp. 8 1.4 3 4.2 Goeldichironomus devineyae 138 2.0 100 200.0 Tanytarsus sp. 9 2.3 3 6.9 Hemiptera Belostoma sp. 2 1.1 1 1.1 Corixidae sp. 2 1.3 1 1.3 Odonata Enallagma sp. 2 1.5 1 1.5 Malacostraca Amphipoda Apocorophium lacustre 3 2.2 3 6.6 Apocorophium louisianum 284 2.2 100 220.0 Apocorophium sp. 300 2.2 100 220.0 Gammarus tigrinus 254 2.0 100 200.0 Decapoda Palaemonetes pugio 3 2.5 3 7.5 Isopoda Cassidinidea lunifrons 39 2.0 30 60.0 Cyathura polita 59 2.0 30 60.0 Mysida Americamysis almyra 2 2.2 1 2.2 Maxillopoda Tanaidacea Hargeria rapax 2 1.6 1 1.6 Mollusca Bivalvia Macoma balthica 4 1.5 3 4.5 Gastropoda Littoridinops sp. 220 2.0 100 200.0 Total 843 1,579.3 Estuarine Biotic Index = 1.87 Total taxa = 26 Total taxa with sensitivitv values = 25 'Only those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. `Sensitivity values provided by NCDWR. 1-17 Table 1-12. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Drinkwater Creek downstream station in Mav 2018. S ecies/taxona Number of individualsb Sensitivity value (TV)' Abundance value n Product of TV n Annelida Clitellata Naididae sp. w/o hair 1 1.0 1 1.0 Paranais litoralis 3 1.1 3 3.3 Tubificoides heterochaetus 1 1.1 1 1.1 Polychaeta Amphicteis floridus 7 2.0 3 6.0 Eteone heteropoda 2 1.6 1 1.6 Marenzelleria viridis 9 2.6 3 7.8 Polydora cornuta 11 1.2 10 12.0 Arthropoda Insecta Diptera Bezzia/Palpomyia complex 1 2.3 1 2.3 Chironomus decorus 124 1.0 100 100.0 Cricotopus sp. 12 1.4 10 14.0 Dicrotendipes nervosus 3 1.0 3 3.0 Goeldichironomus devineyae 51 2.0 30 60.0 Parachironomus sp. 31 1.1 30 33.0 Tanytarsus sp. 3 2.3 3 6.9 Malacostraca Amphipoda Apocophorium louisianum 92 2.2 30 66.0 Apocorophium sp. 193 2.2 100 220.0 Gammarus mucronatus 192 2.3 100 230.0 Gammarus tigrinus 249 2.0 100 200.0 Lepidactylus dytiscus 1 3.5 1 3.5 Decapoda Palaemonetes pugio 40 2.5 30 75.0 Isopoda Cassidinidea lunifrons 6 2.0 3 6.0 Cyathura polita 28 2.0 10 20.0 Edotia montosa 4 2.6 3 7.8 Tanaidacea Hargeria rapax 206 1.6 100 160.0 Maxillopoda Sessilia Balanus improvisus 13 2.0 10 20.0 Mollusca Bivalvia Geukensia demissa 3 3.4 3 10.2 Mytilopsis leucophaeata 3 1.5 3 4.5 Gastropoda Littoridinops sp. 204 2.0 100 200.0 Total 1 792 1,475.0 Estuarine Biotic Index = 1.86 Total taxa = 30 Total taxa with sensitivitv values = 26 'Only those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. 'Sensitivity values provided by NCDWR. 1-18 Table 1-13. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Long Creek upstream station in May 2018. Species/taxon' Number of individualsb Sensitivity value (SV)` Abundance value (n) Product of (SV)(n) Annelida Clitellata Enchytraeidae sp. 2 1.0 1 1.0 Paranais litoralis 12 1.1 10 11.0 Polychaeta Amphicteis floridus 38 2.0 30 60.0 Eteone heteropoda 2 1.6 1 1.6 Polydora cornuta 2 1.2 1 1.2 Streblospio benedicti 10 1.1 10 11.0 Arthropoda Insecta Coleoptera Berosus sp. 2 1.5 1 1.5 Peltodytes sp. 3 1.4 3 4.2 Diptera Bezzia/Palpomyia complex 4 2.3 3 6.9 Chironomus decorus 200 1.0 100 100.0 Cricotopus sp. 152 1.4 100 140.0 Goeldichironomus devineyae 34 2.0 30 60.0 Parachironomus sp. 3 1.1 3 3.3 Tabanus sp. 2 1.4 1 1.4 Tanytarsus sp. 88 2.3 30 69.0 Hemiptera Pelocoris femoratus 5 2.3 3 6.9 Odonata Enallagma sp. 3 1.5 3 4.5 Malacostraca Amphipoda Apocorophium louisianum 25 2.2 10 22.0 Apocorophium sp. 206 2.2 100 220.0 Gammarus mucronatus 4 2.3 3 6.9 Gammarus tigrinus 234 2.0 100 200.0 Decapoda Palaemonetes pugio 4 2.5 3 7.5 Isopoda Cassidinidea lunifrons 8 2.0 3 6.0 Cyathura polita 3 2.0 3 6.0 Mysida Americamysis almyra 4 2.2 3 6.6 Maxillopoda Sessilia Balanus improvisus 35 2.0 30 60.0 Mollusca Bivalvia Geukensia demissa 3 3.4 3 10.2 Macoma balthica 2 1.5 1 1.5 Gastropoda Littoridinops sp. 300 2.0 100 200.0 Total 689 1,230.2 Estuarine Biotic Index = 1.79 Total taxa = 32 Total taxa with sensitivitv values = 28 'Only those taxa for which a sensitivity value is available are displayed. bTotal number of individuals caught in all three sweep replicates. °Sensitivity values provided by NCDWR. 1-19 Table 1-14. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Long Creek downstream station in May 2018. S ecies/taxon' Number of Sensitivity individualsb value SV ` Abundance Product of value (n) (SV)(n Annelida Polychaeta Eteone heteropoda 1 1.6 1 1.6 Marenzelleria viridis 2 2.6 1 2.6 Neanthes succinea 1 1.7 1 1.7 Polydora cornuta 3 1.2 3 3.6 Arthropoda Insecta Diptera Chironomus decorus 3 1.0 3 3.0 Goeldichironomus devineyae 2 2.0 1 2.0 Parachironomus sp. 1 1.1 1 1.1 Tanytarsus sp. 6 2.3 3 6.9 Hemiptera Corixidae sp. 2 1.3 1 1.3 Odonata Enallagma sp. 1 1.5 1 1.5 Malacostraca Amphipoda Apocorophium lacustre 3 2.2 3 6.6 Apocorophium louisianum 21 2.2 10 22.0 Apocorophium sp. 22 2.2 10 22.0 Gammarus mucronatus 257 2.3 100 230.0 Gammarus tigrinus 245 2.0 100 200.0 Decapoda Palaemonetes pugio 86 2.5 30 75.0 Rhithropanopeus harrisii 1 2.5 1 2.5 Isopoda Cyathura polita 1 2.0 1 2.0 Edotia montosa 1 2.6 1 2.6 Mysida Americamysis almyra 6 2.2 3 6.6 Tanaidacea Hargeria rapax 126 1.6 100 160.0 Maxillopoda Sessilia Balanus improvisus 34 2.0 30 60.0 Mollusca Bivalvia Geukensia demissa 2 3.4 1 3.4 Gastropoda Littoridinops sp. 124 2.0 100 200.0 Total 506 1,018.0 Estuarine Biotic Index = 2.01 Total taxa = 27 Total taxa with sensitivity values = 23 'Only those taxa for which a sensitivity value is available are displayed TTotal number of individuals caught in all three sweep replicates. `Sensitivity values provided by NCDWR. 1-20 Table 1-15. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Tooley Creek upstream station in May 2018. Species/taxona Number of individualsb Sensitivity value SV ° Abundance value (n) Product of SV n Annelida Clitellata Enchytraeidae sp. 1 1.0 1 1.0 Paranais litoralis 1 1.1 1 1.1 Polychaeta Amphicteis floridus 5 2.0 3 6.0 Eteone heteropoda 13 1.6 10 16.0 Mediomastus ambiseta 1 2.0 1 2.0 Polydora cornuta 1 1.2 1 1.2 Streblospio benedicti 2 1.1 1 1.1 Arthropoda Insecta Coleoptera Berosus sp. 2 1.5 1 1.5 Diptera Bezzia/Palmonyia complex 2 2.3 1 2.3 Chironomus decorus 197 1.0 100 100.0 Dicrotendipes nervosus 1 1.0 1 1.0 Goeldichironomus devineyae 13 2.0 10 20.0 Parachironomus sp. 7 1.1 3 3.3 Tanytarsus sp. 1 2.3 1 2.3 Malacostraca Amphipoda Apocorophium lacustre 2 2.2 1 2.2 Apocorophium louisianum 28 2.2 10 22.0 Apocorophium sp. 191 2.2 100 220.0 Gammarus mucronatus 24 2.3 10 23.0 Gammarus tigrinus 54 2.0 30 60.0 Decapoda Palaemonetes pugio 88 2.5 30 75.0 Isopoda Cassidinidea lunifrons 3 2.0 3 6.0 Cyathura polita 8 2.0 3 6.0 Edotia montosa 3 2.6 3 7.8 Mysida Americamysis almyra 2 2.2 1 2.2 Tanaidacea Hargeria rapax 145 1.6 100 160.0 Maxillopoda Sessila Balanus improvisus 19 2.0 10 20.0 Mollusca Bivalvia Geukensia demissa 1 3.4 1 3.4 Macoma balthica 7 1.5 3 4.5 Gastropoda Littoridinops sp. 300 2.0 100 200.0 Total 540 970.9 Estuarine Biotic Index = 1.80 Total taxa = 30 Total taxa with sensitivitv values = 28 aOnly those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. `Sensitivity values provided by NCDWR. 1-21 Table 1-16. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Tooley Creek downstream station in Mav of 2018. Species/taxon' Number of individualsb Sensitivity value (SV)` Abundance Product of value (n) (SV)(n) Annelida Polychaeta Eteone heteropode 1 1.6 1 1.6 Heteromastus filiformis 1 1.1 1 1.1 Neanthea succinea 1 1.7 1 1.7 Arthropoda Insecta Coleoptera Peltodytes sp. 4 1.4 3 4.2 Diptera Chironomus decorus 28 1.0 10 10.0 Goeldichironomus devineyae 14 2.0 10 20.0 Parachironomus sp. 2 1.1 1 1.1 Tanytarsus sp. 2 2.3 1 2.3 Hemiptera Pelocoris femoratus 1 2.3 1 2.3 Malacostraca Amphipoda Apocorophium louisianum 33 2.2 30 66.0 Apocorophium sp. 96 2.2 30 66.0 Gammarus mucronatus 105 2.3 100 230.0 Gammarus tigrinus 213 2.0 100 200.0 Decapoda Palaemonetes pugio 85 2.5 30 75.0 Rhithropanopeus harrisii 2 2.5 1 2.5 Isopoda Cassidinidea lunifrons 6 2.0 3 6.0 Cyathura polita 2 2.0 1 2.0 Edotia montosa 3 2.6 3 7.8 Mysida Americamysis almyra 2 2.2 1 2.2 Tanaidacea Hargeria rapax 164 1.6 100 160.0 Maxillopoda Sessilia Balanus improvisus 102 2.0 100 200.0 Mollusca Bivalvia Macoma balthica 1 1.5 1 1.5 Gastropoda Littoridinops sp. 195 2.0 100 200.0 Total 1 629 1,263.3 Estuarine Biotic Index = 2.01 Total taxa = 24 Total taxa with sensitivity values = 22 'Only those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. 'Sensitivity values provided by NCDWR. 1-22 Table 1-17. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Muddy Creek upstream station in May 2018. S ecies/taxona Number of individualsb Sensitivity Abundance value (SV)° value n Product of SV n Annelida Clitellata Enchytraeidae sp. 31 1.0 30 30.0 Paranais litoralis 3 1.1 3 3.3 Polychaeta Amphicteis floridus 64 2.0 30 60.0 Eteone heteropoda 3 1.6 3 4.8 Laeonereis culveri 3 1.0 3 3.0 Polydora cornuta 2 1.2 1 1.2 Streblospio benedicti 5 1.1 3 3.3 Arthropoda Insecta Coleoptera Berosus sp. 5 1.5 3 4.5 Tropisternus sp. 3 1.0 3 3.0 Diptera Bezzia/Palpomyia complex 3 2.3 3 6.9 Chironomus decorus 233 1.0 100 100.0 Cricotopus sp. 35 1.4 30 42.0 Dicrotendipes nervosus 6 1.0 3 3.0 Goeldichironomus devineyae 206 2.0 100 200.0 Parachironomus sp. 13 1.1 10 11.0 Tanytarsus sp. 9 2.3 3 6.9 Hemiptera Abedus/Belostoma complex 8 1.0 3 3.0 Corixidae sp. 3 1.3 3 3.9 Pelocoris femoratus 2 2.3 1 2.3 Odonata Enallagma sp. 12 1.5 10 15.0 Ischnura sp. 3 1.0 3 3.0 Malacostraca Amphipoda Apocorophium lacustre 1 2.2 1 2.2 Apocorophium louisianum 181 2.2 100 220.0 Apocorophium sp. 300 2.2 100 220.0 Gammarus mucronatus 9 2.3 3 6.9 Gammarus tigrinus 300 2.0 100 200.0 Decapoda Palaemonetes pugio 91 2.5 30 75.0 Isopoda Cassidinidea lunifrons 48 2.0 30 60.0 Cyathura polity 8 2.0 3 6.0 Maxillopoda Sessila Balanus improvisus 15 2.0 10 20.0 Mollusca Bivalvia Mytilopsis leucophaeata 3 1.5 3 4.5 Gastropoda Littoridinops sp. 300 2.0 100 200.0 Total 1 828 1,524.7 Estuarine Biotic Index = 1.84 Total taxa = 39 Total taxa with sensitivitv values = 31 aOnly those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. °Sensitivity values provided by NCDWR. 1-23 Table 1-18. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Muddy Creek downstream station in May 2018. Number of Sensitivity Abundance Product of Species/taxona individualsb value (SW value (n) (SV)(n) Annelida Clitellata Enchytraeidae sp. 2 1.0 1 1.0 Limnodrilus hoffineistri 1 1.0 1 1.0 Polychaeta Amphicteis floridus 5 2.0 3 6.0 Marenzelleria viridis 1 2.6 1 2.6 Neanthes succinea 1 1.7 1 1.7 Arthropoda Insecta Coleoptera Berosus sp. 2 1.5 1 1.5 Peltodytes sp. 1 1.4 1 1.4 Tropisternus quadristriatus quadristriatus 1 1.1 1 1.1 Diptera Chironomus decorus 100 1.0 100 100.0 Cricotopus sp. 1 1.4 1 1.4 Dicrotendipes nervosus 5 1.0 3 3.0 Goeldichironomus devineyae 94 2.0 30 60.0 Parachironomus sp. 2 1.1 1 1.1 Tanytarsus sp. 5 2.3 3 6.9 Hemiptera Corixidae sp. 2 1.3 1 1.3 Pelocoris femoratus 1 2.3 1 2.3 Trichocorixa sexcinta 1 1.0 1 1.0 Malacostraca Amphipoda Apocorophium lacustre 7 2.2 3 6.6 Apocorophium louisianum 150 2.2 100 220.0 Apocorophium sp. 295 2.2 100 220.0 Gammarus mucronatus 110 2.3 100 230.0 Gammarus tigrinus 300 2.0 100 200.0 Decapoda Palaemonetes pugio 11 2.5 10 25.0 Isopoda Cassidinidea lunifrons 12 2.0 10 20.0 Mysida Americamysis almyra 2 2.2 1 2.2 Maxillopoda Sessilia Balanus improvisus 6 2.0 3 6.0 Mollusca Bivalvia Macoma balthica 1 1.5 1 1.5 Macoma tenta 1 2.0 1 2.0 Mytilopsis leucophaeta 1 1.5 1 1.5 Gastropoda Littoridinops sp. 300 2.0 100 200.0 Total 681 1.328.1 Estuarine Biotic Index = 1.95 Total taxa = 31 Total taxa with sensitivitv values = 28 aOnly those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. °Sensitivity values provided by NCDWR. 1-24 Table 1-19. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Huddles Cut upstream station in May 2018. S ecies/taxon' Number of individualsb Sensitivity value SV ` Abundance value n Product of SV n Annelida Clitellata Enchytraeidae sp. 1 1.0 1 1.0 Naididae sp. w/o hair 1 1.0 1 1.0 Tubificoides heterochaetus 29 1.1 10 11.0 Polychaeta Amphicteis floridus 2 2.0 1 2.0 Eteone heteropda 1 1.6 1 1.6 Heteromastus filiformis 17 1.1 10 11.0 Mediomastus ambiseta 6 2.0 3 6.0 Neanthes succinea 2 1.7 1 1.7 Polydora cornuta 9 1.2 3 3.6 Streblospio benedicti 17 1.1 10 11.0 Arthropoda Insecta Diptera Bezzia/Palpomyia complex 6 2.3 3 6.9 Chironomus decorus 1 1.0 1 1.0 Goeldichironomus devineyae 7 2.0 3 6.0 Tanytarsus sp. 36 2.3 30 69.0 Hemiptera Abedus/Belostoma complex 1 1.0 1 1.0 Malacostraca Amphipoda Ameroculodes complex 1 2.6 1 2.6 Apocorophium lacustre 10 2.2 10 22.0 Apocorophium louisianum 27 2.2 10 22.0 Apocorophium sp. 78 2.2 30 66.0 Gammarus mucronatus 11 2.3 10 23.0 Gammarus tigrinus 42 2.0 30 60.0 Decapoda Palaemonetes pugio 79 2.5 30 75.0 Rhithropanopeus harrisii 2 2.5 1 2.5 Tanaidacea Hargeria rapax 1 1.6 1 1.6 Maxillopoda Sessilia Balanus improvisus 62 2.0 30 60.0 Mollusca Bivalvia Macoma balthica 22 1.5 10 15.0 Macoma tenta 6 2.0 3 6.0 Gastropoda Littoridinops sp. 63 2.0 30 60.0 Total I 1 275 549.5 Estuarine Biotic Index = 2.00 Total taxa = 29 Total taxa with sensitivitv values = 26 'Only those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. °Sensitivity values provided by NCDWR. 1-25 Table 1-20. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Huddles Cut downstream station in May 2018. S ecies/taxona Number of individualsb Sensitivity value SV)` Abundance value (n) Product of (SV n Annelida Clitellata Naididae sp. w/o hair 6 1.0 3 3.0 Paranais litoralis 1 1.1 1 1.1 Polychaeta Heteromastus filiformis 1 1.1 1 1.1 Leitoscoloplos fragilis 1 1.4 1 1.4 Marenzelleria viridis 23 2.6 10 26.0 Neanthes succinea 2 1.7 1 1.7 Polydora cornuta 3 1.2 3 3.6 Arthropoda Insecta Diptera Goeldichironomus devineyae 1 2.0 1 2.0 Parachironomus sp. 1 1.1 1 1.1 Tanytarsus sp. 1 2.3 1 2.3 Malacostraca Amphipoda Ameroculodes complex 3 2.6 3 7.8 Apocorophium lacustre 9 2.2 3 6.6 Apocorophium louisianum 1 2.2 1 2.2 Apocorophium sp. 6 2.2 3 6.6 Gammarus mucronatus 83 2.3 30 69.0 Gammarus tigrinus 300 2.0 100 200.0 Lepidactylus dytiscus 2 3.5 1 3.5 Decapoda Palaemonetes pugio 41 2.5 30 75.0 Rhithropanopeus harrisii 1 2.5 1 2.5 Isopoda Hargeria rapax 4 1.6 3 4.8 Maxillopoda Sessilia Balanus improvisus 91 2.0 30 60.0 Mollusca Bivalvia Geukensia demissa 1 3.4 1 3.4 Macoma balthice 4 1.5 3 4.5 Gastropoda Littoridinops sp. 7 2.0 3 6.0 Total 235 495.2 Estuarine Biotic Index = 2.11 Total taxa = 26 Total taxa with sensitivitv values = 22 aOnly those taxa for which a sensitivity value is available are displayed TTotal number of individuals caught in all three sweep replicates. `Sensitivity values provided by NCDWR. 1-26 Table 1-21. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Porter Creek upstream station in May 2018. Species/taxona Number of individualsb Sensitivity Abundance value SV ` value n) Product of (SV)(n) Annelida Clitellata Enchytraeidae sp. 1 1.0 1 1.0 Naididae sp. w/o hair 7 1.0 3 3.0 Paranais litoralis 5 1.1 3 3.3 Tubificoides heterochaetus 4 1.1 3 3.3 Polychaeta Amphicteis floridus 14 2.0 10 20.0 Arthropoda Insecta Coleoptera Berosus sp. 20 1.5 10 15.0 Diptera Bezzia/Palpomyia complex 2 2.3 1 2.3 Chironomus decorus 4 1.0 3 3.0 Dicrotendipes nervosus 1 1.0 1 1.0 Goeldichironomus devineyae 17 2.0 10 20.0 Tanytarsus sp. 5 2.3 3 6.9 Hemiptera Abedus/Belostoma complex 10 1.0 10 10.0 Corixidae sp. 2 1.3 1 1.3 Pelocoris femoratus 9 2.3 3 6.9 Ranatra nigra 1 2.6 1 2.6 Odonata Enallagma sp. 5 1.5 3 4.5 Malacostraca Amphipoda Apocorophium lacustre 129 2.2 100 220.0 Apocorophium sp. 42 2.2 30 66.0 Gammarus tigrinus 300 2.0 100 200.0 Decapoda Palaemonetes pugio 31 2.5 30 75.0 Isopoda Cassidinidea lunifrons 41 2.0 30 60.0 Cyathura polita 5 2.0 3 6.0 Mollusca Gastropoda Littoridinops sp. 183 2.0 100 200.0 Total 459 931.1 Estuarine Biotic Index = 2.03 Total taxa = 29 Total taxa with sensitivitv values = 21 aOnly those taxa for which a sensitivity value is available are displayed TTotal number of individuals caught in all three sweep replicates. °Sensitivity values provided by NCDWR. 1-27 Table 1-22. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Porter Creek downstream station in May of 2018. Species/taxon' Number of Sensitivity individualsb value SV ` Abundance value n) Product of (SV)(n) Annelida Polychaeta Marenzellaria viridis 6 2.6 3 7.8 Arthropoda Insecta Diptera Chironomus decorus 6 1.0 3 3.0 Cricotopus sp. 18 1.4 10 14.0 Goeldichironomus devineyae 32 2.0 30 60.0 Hemiptera Trichocorixa sexcinta 2 1.0 1 1.0 Malacostraca Amphipoda Apocorophium lacustre 24 2.2 10 22.0 Apocorophium louisianum 30 2.2 30 66.0 Apocorophium sp. 100 2.2 100 220.0 Gammarus mucronatus 120 2.3 100 230.0 Gammarus tigrinus 300 2.0 100 200.0 Decapoda Palaemonetes pugio 28 2.5 10 25.0 Rhithropanopeus harrisii 4 2.5 3 7.5 Isopoda Cassidinidea lunifrons 64 2.0 30 60.0 Cyathura polita 2 2.0 1 2.0 Edotia montosa 2 2.6 1 2.6 Tanaidacea Hargeria rapax 66 1.6 30 48.0 Maxillopoda Sessilia Balanus improvisus 20 2.0 10 20.0 Mollusca Bivalvia Macoma balthica 2 1.5 1 1.5 Gastropoda Littoridinops sp. 242 2.0 100 200.0 Total 573 1,190.4 Estuarine Biotic Index = 2.08 Total taxa = 18 Total taxa with sensitivity values = 18 'Only those taxa for which a sensitivity value is available are displayed TTotal number of individuals caught in all three sweep replicates. `Sensitivity values provided by NCDWR. 1-28 Table 1-23. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the DCUT11 upstream station in May 2018. S ecies/taxona Number of individuals" Sensitivity value SV ` Abundance value n Product of SV n Annelida Clitellata Enchytraeidae sp. 3 1.0 3 3.0 Limnodrilus hoffineisteri 4 1.0 3 3.0 Naididae sp. w/o hair 1 1.0 1 1.0 Polychaeta Amphicteis floridus 218 2.0 100 200.0 Streblospio benedicti 3 1.1 3 3.3 Arthropoda Insecta Coleoptera Berosus sp. 21 1.5 10 15.0 Peltodytes sp. 2 1.4 1 1.4 Diptera Bezzia/Palmonyia complex 43 2.3 30 69.0 Chironomus decorus 6 1.0 3 3.0 Corynoneura sp. 3 2.5 3 7.5 Dicrotendipes nervosus 51 1.0 30 30.0 Goeldichironomus devineyae 7 2.0 3 6.0 Procladius sp. 3 1.2 3 3.6 Tanytarsus sp. 120 2.3 100 230.0 Hemiptera Corixidae sp. 3 1.3 3 3.9 Ranatra kirkaldyi 1 2.6 1 2.6 Odonata Enallagma sp. 13 1.5 10 15.0 Libellula sp. 10 1.1 10 11.0 Malacostraca Amphipoda Apocophorium lacustre 10 2.2 10 22.0 Apocophorium sp. 18 2.2 10 22.0 Gammarus tigrinus 300 2.0 100 200.0 Decapoda Palaemonetes pugio 13 2.5 10 25.0 Isopoda Cassidinidea lunifrons 55 2.0 30 60.0 Mollusca Bivalvia Mytilopsis leucophaeta 8 1.5 3 4.5 Gastropoda Littoridinops sp. 300 2.0 100 200.0 Total 580 1,141.8 Estuarine Biotic Index = 1.97 Total taxa = 28 Total taxa with sensitivity values = 23 aOnly those taxa for which a sensitivity value is available are displayed. bTotal number of individuals caught in all three sweep replicates. Sensitivity values provided by NCDWR. 1-29 Table 1-24. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the DCUT11 downstream station in May of 2018. S ecies/taxona Number of individualsb Sensitivity value SV)` Abundance value n Product of (SV)(n) Annelida Polychaeta Amphicteis floridus 21 2.0 10 20.0 Marenzelleria viridis 6 2.6 3 7.8 Arthropoda Insecta Coleoptera Berosus sp. 14 1.5 10 15.0 Diptera Bezzia/Palpomyia complex 23 2.3 10 23.0 Dicrotendipes nervosus 78 1.0 30 30.0 Tanytarsus sp. 164 2.3 100 230.0 Hemiptera Ranatra australis 1 2.6 1 2.6 Odonata Enallagma sp. 4 1.5 3 4.5 Libellula sp. 1 1.1 1 1.1 Malacostraca Amphipoda Apocorophium lacustre 48 2.2 30 66.0 Apocorophium sp. 41 2.2 30 66.0 Gammarus tigrinus 300 2.0 100 200.0 Decapoda Palaemonetes pugio 24 2.5 10 25.0 Isopoda Cassidinidea lunifrons 9 2.0 3 6.0 Cyathura polita 4 2.0 3 6.0 Mollusca Bivalvia Mytilopsis leucophaeta 4 1.5 3 4.5 Gastropoda Littoridinops sp. 300 2.0 100 200.0 Total 447 907.5 Estuarine Biotic Index = 2.03 Total taxa = 19 Total taxa with sensitivity values = 16 'Only those taxa for which a sensitivity value is available are displayed TTotal number of individuals caught in all three sweep replicates. `Sensitivity values provided by NCDWR. 1-30 Table 1-25. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the DCUT19 upstream station in May 2018. Species/taxona Number of individualsb Sensitivity value SV ` Abundance value n Product of (SV)(n) Annelida Clitellata Enchytraeidae sp. 6 1.0 3 3.0 Naididae sp. w/o hair 12 1.0 10 10.0 Polychaeta Amphicteis floridus 10 2.0 10 20.0 Eteone heteropoda 4 1.6 3 4.8 Polydora cornuta 4 1.2 3 3.6 Laeonereis culveri 3 1.0 3 3.0 Arthropoda I nsecta Coleoptera Berosus sp. 32 1.5 30 45.0 Diptera Bezzia/Palpomyia complex 57 2.3 30 69.0 Chironomus decorus 5 1.0 3 3.0 Dicrotendipes nervosus 7 1.0 3 3.0 Goeldichironomus devineyae 84 2.0 30 60.0 Tabanus sp. 2 1.4 1 1.4 Tanytarsus sp. 30 2.3 30 69.0 Hemiptera Ranatra nigra 2 2.6 1 2.6 Odonata Libellula sp. 2 1.1 1 1.1 Malacostraca Amphipoda Apocorophium louisianum 64 2.2 30 66.0 Apocorophium sp. 300 2.2 100 220.0 Gammarus tigrinus 227 2.0 100 200.0 Isopoda Cassidinidea lunifrons 7 2.0 3 6.0 Cyathura polita 6 2.0 3 6.0 Mollusca Bivalvia Macoma balthica 2 1.5 1 1.5 Mytilopsis leucopaeata 2 1.5 1 1.5 Gastropoda Littoridinops sp. 300 2.0 100 200.0 Total 499 999.5 Estuarine Biotic Index = 2.00 Total taxa = 25 Total taxa with sensitivity values = 22 aOnly those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. °Sensitivity values provided by NCDWR. 1-31 Table 1-26. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the DCUT19 downstream station in Mav of 2018. Species/taxona Number of individualsb Sensitivity value (SV)° Abundance value (n) Product of (SV)(n) Annelida Clitellata Naididae sp. w/ hair 1 1.0 1 1.0 Paranais litoralis 28 1.1 10 11.0 Polychaeta Amphicteis floridus 4 2.0 3 6.0 Eteone heteropoda 5 1.6 3 4.8 Marenzelleria virdis 2 2.6 1 2.6 Polydora cornuta 3 1.2 3 3.6 Streblospio benedicti 1 1.1 1 1.1 Arthropoda Insecta Coleoptera Peltodytes sp. 2 1.4 1 1.4 Diptera Bezzia/Palpomyia complex 7 2.3 3 6.9 Chironomus decorus 59 1.0 30 30.0 Goeldichironomus devineyae 40 2.0 30 60.0 Parachironomus sp. 1 1.1 1 1.1 Tanytarsus sp. 45 2.3 30 69.0 Odonata Libellula sp. 2 1.1 1 1.1 Malacostraca Amphipoda Apocorophium louisianum 34 2.2 30 66.0 Apocorophium sp. 223 2.2 100 220.0 Gammarus tigrinus 300 2.0 100 200.0 Decapoda Palaemonetes pugio 36 2.5 30 75.0 Hemiptera sp. Corixidae sp. 4 1.3 3 3.9 Isopoda Cassidinidea lunifrons 3 2.0 3 6.0 Cyathura polita 3 2.0 3 6.0 Edotia montosa 14 2.6 10 26.0 Tanaidacea Hargeria rapax 66 1.6 30 48.0 Maxillopoda Sessila Balanus improvisus 13 2.0 10 20.0 Mollusca Bivalvia Macoma balthica 3 1.5 3 4.5 Gastropoda Littoridinops sp. 252 2.0 100 200.0 Total 540 1,075.0 Estuarine Biotic Index = 1.99 Total taxa = 26 Total taxa with sensitivity values = 24 aOnly those taxa for which a sensitivity value is available are displayed bTotal number of individuals caught in all three sweep replicates. °Sensitivity values provided by NCDWR. 5% Table 1-27. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Duck Creek upstream station in May 2018. Species/taxon' Number of individualsb Sensitivity value (SV)` Abundance value n Product of (SV)(n) Annelida Clitellata Enchytraeidae sp. 8 1.0 3 3.0 Naididae sp. w/o hair 27 1.0 10 10.0 Nais sp. 104 1.3 100 130.0 Paranais litoralis 272 1.1 100 110.0 Polychaeta Amphicteis floridus 2 2.0 1 2.0 Eteone heteropoda 2 1.6 1 1.6 Arthropoda Insecta Coleoptera Berosus sp. 18 1.5 10 15.0 Peltodytes sp. 4 1.4 3 4.2 Diptera Bezzia/Palpomyia complex 2 2.3 1 2.3 Cricotopus sp. 3 1.4 3 4.2 Dicrotendipes nervosus 149 1.0 100 100.0 Parachironomus sp. 3 1.1 3 3.3 Tanytarsus sp. 31 2.3 30 69.0 Hemiptera Corixidae sp. 11 1.3 10 13.0 Odonata Libellula sp. 2 1.1 1 1.1 Malacostraca Amphipoda Apocophorium sp. 1 2.2 1 2.2 Gammarus tigrinus 300 2.0 100 200.0 Isopoda Cassidindea lunifrons 17 2.0 10 20.0 Maxillopoda Sessila Balanus improvisus 1 2.0 1 2.0 Mollusca Bivalvia Mytilopsis leucophaeata 11 1.5 10 15.0 Gastropoda Littoridinops sp. 194 2.0 100 200.0 Physidae sp. (physa/pysella) 3 1.3 3 3.9 Total 601 911.8 Estuarine Biotic Index = 1.52 Total taxa = 27 Total taxa with sensitivity values = 21 'Only those taxa for which a sensitivity value is available are displayed. bTotal number of individuals caught in all three sweep replicates. 'Sensitivity values provided by NCDWR. 1-33 Table 1-28. Estuarine Biotic Index (EBI) calculations for benthic sweep samples at the Duck Creek downstream station in Mav 2018. Species/taxon' Number of Sensitivity individualsb value (SV)` Abundance value (n) Product of (SV)(n) Annelida Clitellata Naididae sp. w/o hair 7 1.0 3 3.0 Paranais litoralis 16 1.1 10 11.0 Polychaeta Amphicteis floridus 1 2.0 1 2.0 Marenzellaria viddis 8 2.6 3 7.8 Mediomastus ambiseta 2 2.0 1 2.0 Arthropoda Insecta Coleoptera Berosus sp. 2 1.5 1 1.5 Tropisternus quadristriatus quadristriatus 2 1.1 1 1.1 Diptera Chironomus decorus 64 1.0 30 30.0 Cricotopus sp. 2 1.4 1 1.4 Dicrotendipes nervosus 7 1.0 3 3.0 Goeldichironomus devineyae 107 2.0 100 200.0 Parachironomus sp. 4 1.1 3 3.3 Tanytarsus sp. 5 2.3 3 6.9 Hemiptera Abedus/Belostoma complex 14 1.0 10 10.0 Corixidae sp. 2 1.3 1 1.3 Malacostraca Amphipoda Apocorophium lacustre 27 2.2 10 22.0 Apocorophium sp. 36 2.2 30 66.0 Gammarus mucronatus 1 2.3 1 2.3 Gammarus tigrinus 300 2.0 100 200.0 Uhlorchestia uhlerl 2 2.0 1 2.0 Decapoda Palaemonetes pugio 38 2.5 30 75.0 Isopoda Cassidinidea lunifrons 36 2.0 30 60.0 Cyathura polita 2 2.0 1 2.0 Edotia montosa 1 2.6 1 2.6 Mysida Americamysis almyra 52 2.2 30 66.0 Maxillopoda Sessilia Balanus improvisus 49 2.0 30 60.0 Tanaidacea Hargeria rapax 122 1.6 100 160.0 Mollusca Bivalvia Geukensia demissa 1 3.4 1 3.4 Gastropoda Littoridinops sp. 300 2.0 100 200.0 Physidae sp. (physa/physella) 1 1.3 1 1.3 Total 637 1,206.9 Estuarine Biotic Index = 1.89 Total taxa = 32 Total taxa with sensitivity values = 28 'Only those taxa for which a sensitivity value is available are displayed. bTotal number of individuals caught in all three sweep replicates. `Sensitivity values provided by NCDWR. 1-34