41 



Figure 3-23. Beals Island Infaunal Biomass Structure 

 100 







Misc 



^ Mollnsc 



Crustacea 



^™ Oligochaeta 



^M Polychaeta 



Constructed Flat (DM) 



Reference (REF) 



3.3.2.2 Taxonomic Composition 



A total of 78 taxa was collected at the Beals Island sites between 1991 and 1998: 

 Sixty-nine taxa were collected at the constructed flat and 65 at the reference area. A total 

 of thirty-three taxa were classified as dominants (Tables 3-17; 3-18). None of the 

 dominants were found exclusively at either site. 



The ten most abundant taxa included (in order of abundance) Tubificoides benedini , 

 Exogene hebes and Streblospio benedicti , Tectadrilus gabriella, Capitella sp. , the 

 amphipod Ampelisca vadorum, R verugera, the amphipods Gammarus oceanicus and 

 Phoxocephalus holbolli , and Polydora quadrilobata (Appendix Table 3). Tubificoides 

 benedini, S^ benedicti and G^ oceanicus were always most abundant at the reference area 

 while T\ gabriella and A. vadorum were always most abundant at the constructed flat. 

 Exogene hebes , Capitella sp. and P. quadrilobata were most abundant at the constructed 

 flat in 1991, but were more abundant in ensuing samples at the reference area. The 

 opposite was true for P. holbolli . Exogene verugera was found in exceptionally high 

 densities in 1992. 



Ecological Monitoring of a Constructed Intertidal Flat at Jonesport, Maine 



