Effects of Discharge from a Dredge Spoils Site on Carroll Island, Maryland.
Technical rept. Apr 72-Jan 74,
EDGEWOOD ARSENAL ABERDEEN PROVING GROUND MD
Pagination or Media Count:
Benthic sampling of macroinvertebrate populations was conducted 14 times from April to August 1972 to determine the effects of a discharge from a dredge spoils site on Carroll Island, MD, on the upper western shore of the Chesapeake Bay. During the sampling period, 8.78 inches of rain fell on the study area from 21 to 23 June 1972 during tropical storm Agnes. Nine samples were collected prior to Agnes and five were taken after the storm. Twenty-two species 20 invertebrates and 2 vertebrates were collected 81.5 of the sample was represented by three species The brackish-water clam, Rangia cuneata the amphipod, Leptocheirus plumulosus and the polychaete, Scolecolepides viridis. The number of small R. cuneata 1.3 to 4.3 mm increased significantly after the storm, indicating that there was an influx of juvenile clams. Despite the extreme temporary hydrologic occurrences caused by the tropical storm, most changes in the number of individuals and species could be attributed to the effects of the dredge spoils discharge on Station 3 and seasonal changes in the species abundance during the study period.
- Water Pollution and Control