13 



3.0 RESULTS 



3.1 Sediment Texture and Sediment Organic Content Results 



3.1.1 Sheep Island 



As might be expected, sediment texture was finer at the Sheep Island constructed 

 intertidal flat than the reference area. The constmcted flat was composed primarily of silts 

 and clays with relatively little (<25%) sand while the reference area was mostly sand and 

 gravel with less than 30% silts and clays (Figure 3-1). Sediment texture appeared to 

 coarsen at both sites in 1994 most likely representing methodological error. Sediment 

 texmre at both sites in 1998 was similar to previous years. Sediment organic content was 

 higher at the Sheep Island constructed flat than the reference area in both 1992 and 1994 

 (Figure 3-2), although it decreased by 1-2% at both sites between years. As previously 

 noted no sediment organic content was measured in 1990 and logistical problems prevented 

 analysis of the 1998 samples. 



Figure 3-1. Sheep Island Sediment Texmre 





% Silt/Clay 





% Sand 



■ 



%Gravel 



1 1 i r 



1990 1992 1994 1998 

 Constructed Flat (DM) 



1990 1992 1994 1998 

 Reference (REF) 



Ecological Monitoring of a Constructed Intertidal Flat at Jonesport, Maine 



