||Response of Peritrichous Ciliates in Fouling Communities to Seawater-Accommodated Hydrocarbons.
Caron, David A. ;
Sieburth, John McN. ;
||Rhode Island Univ., Kingston. Graduate School of Oceanography.;Environmental Research Lab., Narragansett, RI.
||EPA-R-807795; EPA-600/J-81-532 ; ERLN-X34
Oil pollution ;
Fuel oil ;
Seasonal variations ;
Animal migrations ;
Food chains ;
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Natural assemblages of peritrichous ciliates that develop in the fouling film on glass slides and plastic Petri dishes in both summer and winter were examined in two ecosystems. Fouling in non-stressed communities proceeded to the same biomass and diversity during the winter, albeit more slowly, as that occurring during summer-time fouling. The reactions of the ciliates to the water-accommodated fraction (water phase of dispersion) of No. 2 fuel oil ranged from inapparent to almost total exclusion from the fouling film. Hydrocarbon stress of stabilized peritrich assemblages consistently resulted in a reduction of biomass.