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- Biological Sciences Peer-Reviewed Articles (2)
- Algae (1)
- Aquatic Environments; Marine Waters; Viruses; Seawater; Inactivation (1)
- Boulder Basin (Ariz. And Nev.) (1)
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- Dissolved organic carbon; bacterioplankton; growth efficiency (1)
- Domains archaea (1)
- Effluent quality (1)
- Environmental quality (1)
- Eucarya (1)
- Fecal Bacteria (1)
- Fecal Coliform (1)
- Fecal Streptococci (1)
- Fresh water pollution (1)
- Hoover Dam (Ariz.-Nev.) (1)
- Hybridization (1)
- Lake Mead National Recreation Area (Ariz. and Nev.) (1)
- Las Vegas Wash (Nev.) (1)
- Mortality (1)
- Quality of water (1)
- Sediment Particle (1)
- Temperature (1)
- Water pollution (1)
- Zooplankton (1)
Articles 1 - 5 of 5
Full-Text Articles in Entire DC Network
Effect Of Sediment Particle Size And Temperature On Fecal Bacteria Mortality Rates And The Fecal Coliform/Fecal Streptococci Ratio, J. M. Howell, Mark S. Coyne, P. L. Cornelius
Effect Of Sediment Particle Size And Temperature On Fecal Bacteria Mortality Rates And The Fecal Coliform/Fecal Streptococci Ratio, J. M. Howell, Mark S. Coyne, P. L. Cornelius
Plant and Soil Sciences Faculty Publications
Extended survival of fecal bacteria in sediment can obscure the source and extent of fecal contamination in agricultural settings. The variability in fecal coliform/fecal streptococci (FC/FS) ratios with time and discrepancies between observable fecal sources and measured FC/FS ratios in shallow surface water from agricultural watersheds may be explained by examining FC and FS mortality rates in response to ambient temperature and sediment particle size. We measured FC and FS mortality rates at three different temperatures and in three feces-amended sediments with different particle size in a laboratory study. In controlled conditions, using physiological saline to reduce cell death by …
A Computer-Simulated Restriction Fragment Length Polymorphism Analysis Of Bacterial Small-Subunit Rrna Genes: Efficacy Of Selected Tetrameric Restriction Enzymes For Studies Of Microbial Diversity In Nature, Craig L. Moyer, James M. Tiedje, Fred C. Dobbs, David M. Karl
A Computer-Simulated Restriction Fragment Length Polymorphism Analysis Of Bacterial Small-Subunit Rrna Genes: Efficacy Of Selected Tetrameric Restriction Enzymes For Studies Of Microbial Diversity In Nature, Craig L. Moyer, James M. Tiedje, Fred C. Dobbs, David M. Karl
OES Faculty Publications
An assessment of 10 tetrameric restriction enzymes (TREs) was conducted by using a computer-simulated restriction fragment length polymorphism (RFLP) analysis for over 100 proximally and distally related bacterial small-subunit (SSU) rRNA gene sequences. Screening SSU rDNA clone libraries with TREs has become an effective strategy because of logistic simplicity, commercial availability, and economy. However, the rationale for selecting the type and number of TREs has not been systematically evaluated. Our objective nas to identify the optimal combination of TREs for RnP screening of cloned SSU rRNA genes from undefined bacterial clone libraries. After computer-simulated TRE digestion, the resultant fragments were …
Report Of Significant Findings--Las Vegas Bay/Boulder Basin Investigations, James F. Labounty, Michael Horn, Bureau Of Reclamation
Report Of Significant Findings--Las Vegas Bay/Boulder Basin Investigations, James F. Labounty, Michael Horn, Bureau Of Reclamation
Publications (WR)
Field sampling was carried out between 0830 and 1500 beginning at the confluence of Las Vegas Wash and the Inner Las Vegas Bay. Ten (10) locations were sampled, each in a similar manner. Locations of sampling stations are in line from the Wash-Bay confluence to a point midway between Saddle and Black Islands. In addition, sampling was done at a location midway between Sentinel Island and the base of Fortification Hill, and at the buoy line in front of Hoover Dam. Sampling stations are labeled from LV01, at Wash-Bay confluence, to LV17 at Hoover Dam. A significant data collection point …
Effects Of Sunlight On Bacteriophage Viability And Structure, Ke Wommack, Rt Hill, Ta Muller, Rr Colwell
Effects Of Sunlight On Bacteriophage Viability And Structure, Ke Wommack, Rt Hill, Ta Muller, Rr Colwell
VIMS Articles
Current estimates of viral abundance in natural waters rely on direct counts of virus-like particles (VLPs), using either transmission or epifluorescence microscopy. Direct counts of VLPs, while useful in studies of viral ecology, do not indicate whether the observed VLPs are capable of infection and/or replication. Rapid decay in bacteriophage viability under environmental conditions has been observed. However, it has not been firmly established whether there is a corresponding degradation of the virus particles, To address this question, viable and direct counts were carried out employing two Chesapeake Bay bacteriophages in experimental microcosms incubated for 56 h at two depths …
Growth Of Bacterioplankton And Consumption Of Dissolved Organic Carbon In The Sargasso Sea, C. A. Carlson, H. W. Ducklow
Growth Of Bacterioplankton And Consumption Of Dissolved Organic Carbon In The Sargasso Sea, C. A. Carlson, H. W. Ducklow
VIMS Articles
Lability of the bulk dissolved organic carbon (DOG) pool and the amount available to bacterioplankton on short time scales (hours to days) were examined in oligotrophic Sargasso Sea water (near Bermuda). We examined bacterial growth and DOC utilization using seawater culture methodology in combination with measurements of bacterial abundance, cell volume, and DOC. Bulk DOC concentrations were determined by high temperature combustion (HTC) analysis, which proved to be a sensitive method for detecting small changes in natural concentration of DOG. Measurable bacterial growth and DOC utilization only occurred in unamended cultures when initial DDC concentrations were greater than observed in …