Recovery of bdellovibrios from submerged surfaces and other aquatic habitats |
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| Authors: | H N Williams A J Schoeffield D Guether J Kelley D Shah W A Falkler Jr |
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| Institution: | (1) University of Maryland at Baltimore, 666 West Baltimore St. Baltimore, 21201 St. Baltimore, MD;(2) Chesapeake Biological Laboratory, University of Maryland Center for Estuarine and Environmental Studies, bBox 38 Solomons, 20688 Maryland, MD, USA;(3) Biology Department, Loyola College, 4501 N. Charles St., 21210 Baltimore, MD, USA;(4) University of Maryland at Baltimore, 666 West Baltimore St., 21201 Baltimore, MD, USA;(5) School of Medicine, Marshall University, WV 25755 Huntington, USA;(6) Present address: Microbiology Department, University of Maryland Dental School, 666 W. Baltimore Street, 21201 Baltimore, MD, USA |
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| Abstract: | The distribution of bdellovibrios was investigated over a wide geographical area of the Chesapeake Bay including some tributaries and subestuaries. Bdellovibrios were recovered from five aquatic habitats; water, sediment, oyster shell surface biofilm, zooplankton, and plants over a wide range of temperature and salinity measurements. Consistently, the greatest number of the predators was recovered from samples of biofilm irrespective of temperature and salinity. A decrease in the numbers and frequency of predators recovered from all habitats was observed at temperatures below 10°C. Only the shell surface biofilm samples yielded bdellovibrios 100% of the time. The organisms were recovered from 79% of water samples and 44% of sediment samples. The results reveal that bdellovibrios are surface-associated organisms and that this association appears to provide some protection for the predators at low temperatures. |
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