The transport of bacteria in the sediments of a temperate marsh |
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Authors: | Parke A. Rublee Susan M. Merkel Maria A. Faust |
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Affiliation: | Chesapeake Bay Centre for Environmental Studies, Smithsonian Institution, P.O. Box 28, Edgewater, Maryland 21037, U.S.A. |
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Abstract: | The number of bacteria in sediments, interstitial water and overlying tidal water of an oligohaline marsh system are about 109, 106 and 106 cells cm?3, respectively. Average cell size in the overlying water (about 0·06 μm3), is much smaller than that in sediments and interstitial water (about 0·18 μm3). Most bacterial cells in sediments are bound to sediment particles and less than 1% of the cells were displaced by percolating water through sediment columns. Concentration of bacteria in flooding tidal waters is generally higher than that in ebbing waters. Movement of bacterial biomass does not appear to be a significant mechanism of particulate organic transport in marsh sediments and marsh sediments do not appear to be a source of suspended bacteria for estuaries. |
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Keywords: | bacteria micro-organisms salt marshes estuaries sediment |
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