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Concentration of Serratia in the Surface Microlayer

Lawrence D. Syzdek
Limnology and Oceanography
Vol. 27, No. 1 (Jan., 1982), pp. 172-177
Stable URL: http://www.jstor.org/stable/2836097
Page Count: 6
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Concentration of Serratia in the Surface Microlayer
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Abstract

Concentrations of Serratia marcescens and Serratia marinorubra were measured in the surface microlayer by a floating Nuclepore filter technique. Controlled removal of the filters permitted comparison of bacterial concentrations in various thicknesses of the microlayer from 8 to 100 μ m. Serratia became enriched in the microlayer by a factor >4 during the process of preparing suspensions by dilution and vortex mixing. Enriched concentrations were found only in the upper 20 μ m and reached enrichment factors >15 within 1 h, but EF values >120 were obtained from the upper 10 μ m of suspensions aged undisturbed for 18 h. Rates of increase of EF were greater for uncleaned water surfaces than for cleaned surfaces, indicating a relationship between microlayer concentration and surface films.

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