Affiliation:
1. Center of Marine Biotechnology, University of Maryland Biotechnology Institute, Baltimore, Maryland 21202
2. Department of Cell Biology and Molecular Genetics
3. Department of Biology, University of Maryland, College Park, Maryland 20742
Abstract
ABSTRACT
Bacteria,
γ-subclass of
Proteobacteria, Vibrio-Photobacterium, Vibrio vulnificus, Vibrio cholerae-Vibrio mimicus,
and
Vibrio cincinnatiensis
in water samples collected from the Choptank River in Chesapeake Bay from 15 April to 16 December 1996 were enumerated using a fluorescent oligonucleotide direct-counting (FODC) procedure. FODC results obtained using a
Bacteria
taxon-specific probe ranged from one-third the number of to the same number as that obtained by the acridine orange direct count (AODC) procedure. The abundance of individual taxa (per liter) ranged from 0.25 × 10
10
to 2.6 × 10
10
Bacteria,
0.32 × 10
8
to 3.1 × 10
8
γ-
Proteobacteria,
0.2 × 10
8
to 2.1 × 10
8
Vibrio-Photobacterium,
0.5 × 10
7
to 10 × 10
7
V. vulnificus,
0.2 × 10
6
to 6 × 10
6
V. cholerae-V. mimicus,
and 0.5 × 10
5
to 8 × 10
5
V. cincinnatiensis.
The occurrence of all taxa monitored in this study was higher in summer; however, these taxa made up a larger proportion of the
Bacteria
when the water temperature was low. Large fluctuations in species abundance as well as in percent composition of
Vibrio-Photobacterium
occurred from week to week, indicating that localized blooms of these taxa occur. The cross-Choptank River transect sample profile of
V. vulnificus
and
V. cholerae-V. mimicus
varied significantly in abundance, and trans-Choptank River transect samples revealed a patchy distribution.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Cited by
135 articles.
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