Table 4. Mean annual frequency distribution of reef macrofauna. 



Mean freq. Variance Standard 

 Species (#/ni2) S deviation % of total 



s- 



X 



Crassostrea virginica^ 14666.9 4811.3 717.2 38.65 



Guekensia demissa 514.8 459.5 68.5 1.36 



Ischadium recuryum 5028.0 4051.0 603.7 13.25 



Mya arenarlj a 852.8 1577.7 235.2 2.25 



Gemma gemma 



Petricola pholadiformis 



Odostomia impressa a 1643.5 1792.5 264.3 4.33 



Anurida maritima a ^ 5453.7 3626.4 1300.5 14.37 



f Balanus ?ip?o7Tsus ^ 1063.9 1063.1 158.5 2.80 



1 Balanus iburneus '^ , 16.9 58.8 8.7 0.04 



L chthamalus fragilis^ 166.3 387.4 57.7 0.44 



Eurypanopeus depressus 1037.1 430.5 64.2 2.73 



Panopeus herbItiT 5 103.1 75.0 11.2 0.27 



Pinnotheres ostreum 24.5 33.5 5.0 0.06 

 Sesarma cinereum 

 Clibanarius vittatus 



Melita nitidi s , 334.2 455.2 67.9 0.88 



ParhyalFTa^iiensis^ 966.2 1278.4 190.6 2.55 



Gammarus palustris" ^ 5.2 - - 



Cassidinidea lunifrons'^ 323.5 171.6 25.6 0.85 



{ 

 { 



Edotea montosa 



4.58 



Neanthes succinea 



Ne reiphyllis fragilis! 78.0 60.9 9.0 0.21 



Streblo'spio benedicti^ , 1362.4 1723.4 259.8 3.59 



Heteromastus filiformis^ 519.8 314.7 46.9 1.37 



Polydora websterT^ 359.3 436.4 65.1 0.95 



Tharyx setigera 



Spirorbis sp. 



Sabellaria megaris 



Amphi trite ornata 



Marphysa sanguinea 



Lysidice ninetta 



Syllidae (unidentified) 



Dodecaceria sp. 



Lepidonotus sublevis 



Polychaete (unidentified) 



Polychaete (unidentified) 



Polychaete (unidentified) 



Nemertina (unidentified)^ 204.0 194.8 29.0 0.54 



Anthozoa (unidentified)^ 1442.5 1376.6 205.5 3.80 



Polyclad (unidentified) 



Sipunculid (unidentified) 



Total: 37,947.4 



^Twenty-two species found in 93% of all samples and considered dominant. 

 Brackets enclose groups of "similar" species that reduce major macrofauna 



members of the reef community to 16. 



45 



