CHAPTER 12 



Table 12-2. — Comparison of benlhic data at 12 stations occupied in April 1975 before the oxygen depletion event and again in October-November 



/y76 after the oxygen depletion event — (continued) 



Number iihscrvcd ;il each stalion each v'car' 



Benlhic organisms 

 observed 



13 



75 



75 



76 



19 



75 76 



24 



75 



76 



Archiannehda 

 Ceriantharia: 



Cerianlheopsis americanus 

 Rhynchocoela 

 Polyehaeta: 



Phylodoce arenae 



Sthenelais Limicola 



Glycera dibranchiata 



Goniadella gracilis 



Nephtys picla 



Aglaophamus circinata 



Exogone hebes 



Nereis grayi 



Scalibregma inflatum 



Clymenella zonalis 



Leiochone dispar 



Spiophanes bombyx 



Aricidea cerruti 



Aricidea wassi 



Lumbrinerides acuta 



Lumbrmeris fragilis 



Lumbrineris tenuis 



Drilonereis magna 



Dorvillea caeca 



Tharyx acutus 



Tharyx annulosus 



Cautleriella kitlariensis 



Ampharete arctica 



Euchone rubrocincta 

 Mollusca: 



Cyclocardia borealis 



Ensis directus 

 Crustacea: 



Leptognatha caeca 



Ptilanthura tricarina 



Cirolana polita 



Edotea triloba 



Ampelisca vandorum 



Ampelisca agassizi 



Byblis serrata 



Unicola irrorata 



Vnicola inermis 



Pseudunciola obliquua 



Protohaustorius wigleyi 



Acanthohaustorius spinosus 



Leptocheirus pinguis 



Phoxocephatus holbolli 



Paraphoxus epistomus 



Cancer irroratus 

 Phoronida: 



Phoronis psammophila 

 Echinodermata: 



Echinarachnius parma 



102 



1 



21 



2 



1 1 .5 5 5 1 1 3 2 



— 13.5 4 .5 10 10 5 3 



1 



2 3 5.5 2 3.5 1 1 



— 1 5.5 1 21 1115 



— .5 2.5 



— .5 2 19 I 



2 62 40 356 24 46 1 4 138 64 



— 1 16.5 2.5 2 6 1 



— 1 2.5 4 18 15 



— 2 1 92.5 16 2 



— 1 7 12.5 .5 1 1 



— 12 6 12.5 2 10 1 



— 39 2 4 1 1 



— .5 



— 6.5 1 1 



— 1 



— 1 



— 1 1 



6 9 1.5 5.5 



— 3 



1 .5 



— 1 1 1 



— 4 



5 7 7.5 3 7.5 1 



— 13 8 14.5 10 26 



10 14 8 10 3 9 



Total # species 

 Total # individuals 

 H' diversity 

 J' equitability 



289 



