Collections were limited to surface samples that included the upper 10 

 centimeters of sediment. Sediments were collected in standard 8-ounce, screw- 

 cap jars; all samples were stored frozen prior to analyses. Detailed 

 analytical methods are described by Saloman (1976) . 



For textural analyses, sediment samples were sieved at 1-phi intervals 

 in nested screens placed on a mechanical shaker. Fraction weights were 

 recorded to the closest milligram and tabulated as weight percentages. No 

 hydrometer or pipette determinations were required because silt-clay per- 

 centages were quite low. Based on grain-size distribution curves, formulas 

 introduced by Folk (1974) were used to calculate statistical properties. 

 Carbon analyses were made using a Leco 750-100, 90-second carbon analyzer. 



Additionally, divers recorded observations of sediment inside and outside 

 the borrow pit at station 1. These observations were made on a regular basis 

 during the first postconstruction collection, and in subsequent collections, 

 until the study ended. 



3. Benthos . 



At all collecting points, infauna was sampled with a hand-operated plug 

 sampler (box corer) that covered a surface area of 1/64 square meter and 

 penetrated the bottom to a depth of 23 centimeters (Saloman, 1976). Replicate 

 samples were taken at each site, but the number was not always the same for 

 each of the three station groups. At stations A and B, four replicates 

 composed a sample (preconstruction base-line study of 1974-75). At station 1, 

 the first collection contained 32 replicates (19 April 1976) , while second and 

 third preconstruction samples each consisted of 36 replicates. After dredging, 

 however, both control and experimental samples from station 1 each included 

 16 replicates. Finally, in the one-time collection at stations 1 to 6, 1 year 

 after dredging, control and experimental samples were each composed of 40 

 replicates. The decision to take more than 4 replicates in most samples was 

 somewhat arbitrary, since sampling to develop a species rarefaction curve 

 showed that 4 plugs comprised an adequate qualitative and quantitative sample 

 of the nearshore benthos (Saloman, 1976). For reference, a schematic 

 representation of the overall sampling plan was prepared to show geographic 

 relationships among stations within the study area, landmarks along the shore, 

 pertinent transect locations from studies started in 1974, and the sampling 

 locations of borrow pits and undredged bottom studied between April 1976 and 

 July 1977 (Fig. 2). 



All benthic samples were taken by scuba divers and sieved on shipboard in 

 a 0.3-meter diameter screen of 0.7 millimeter mesh. Material remaining on the 

 screen was preserved with 10-percent seawater formalin in standard 2-quart, 

 screwcap jars. Rose bengal dye was added to the formalin to stain organisms 

 and facilitate their subsequent separation from debris. In the laboratory. 



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