Abstract
A large number and variety of species of actinomycetes were isolated from sediment samples collected in New York Harbour and from the New York Bight in the course of studies on the distribution of these bacteria in coastal regions. Isolates recovered from the New York Bight sediment were similar to those from other inshore areas, although the total counts were lower. Larger numbers of actinomycetes were recovered from harbour sediments, as well as dredging spoil samples collected from a capped dump site in the New York Bight. The capping operation was monitored and effects on the microbial populations were detected. Selected genera associated with the dredge spoil were determined to be allochthonous, providing useful microbial markers for the dredged material. Many of the microbial species survive in the dump area, but some appear to be metabolically active, perhaps altering the chemical nature of the dumped material.
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