The Biogenic Structure of Lower Chesapeake Bay Sediments

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U.S. Enviromental Protection Agency
This study was designed to obtain Information on the animal-sediment relationships in the Chesapeake Bay as a means of assessing the relative importance of benthic macroinvertebrates in determining the distribution and fate of sediment-borne toxic substances. Large volume box cores for biological examination were collected simultaneously with cores taken by Maryland Geological Survey for interstitial water chemistry. Vertical distribution of organisms within the cores was utilized as a means of determining the depth of biological mixing. The vertical distribution of organisms has been found to be correlated to the depth of mixing. Employed was an x-ray technique to determine the relative amounts of mixing in different areas of the estuary as well as the types of biogenic structure produced by resident organisms.
Biogenic Structure, Lower Chesapeake Bay, Sediments