Index Catalog // ScholarsArchive@OSU

Creator:: Sherr, Evelyn and Sherr, Barry F.
Resource Type:: Article
Full Text:: SHERR, EVELYN, AND BARRY SHERR. Role of microbes in pelagic food

Creator:: Sherr, Barry F., Ross, Celia, and Sherr, Evelyn B.
Abstract:: Microzooplankton grazing impact on phytoplankton in the Bering Sea during spring was assessed in 2008, 2009 and 2010 using two-point dilution assays. Forty-nine experiments were completed in a region encompassing shelf to slope waters, including the 70 m line along the edge of the shelf. A variety of conditions were...
Resource Type:: Article
Full Text:: conditions 5 6 7 EVELYN B. SHERR* 8 BARRY F. SHERR 9 CELIA ROSS 10 11 College of Earth, Ocean

Creator:: Choi, Joon W., Sherr, Barry F., and Sherr, Evelyn B.
Abstract:: The majority of bacteria suspended in seawater do not appear to be metabolically active or in good physiological condition as assessed by various methods. We tested the idea that a large fraction of ‘inactive’ bacterial cells can become ‘active’ with respect to detectable cell-specific electron transport system (ETS) activity, determined...
Resource Type:: Article

Creator:: Sherr, Barry F., Sherr, Evelyn, and McDaniel, Julie
Abstract:: Grazing by phagotrophic flagellates and ciliates is a major source of mortality for bacterioplankton in both marine and freshwater systems. Recent studies have demonstrated a positive relationship between clearance rate and prey size for bacterivorous protists. We tested the idea that, by selectively grazing the larger (more actively growing or...
Resource Type:: Article
Full Text:: Frequency of Dividing Cells in Bacterioplankton Assemblagest BARRY F. SHERR,1* EVELYN B. SHERR,' AND JULIE

Creator:: Longnecker, K., Sherr, Barry F., and Sherr, Evelyn
Abstract:: We evaluated whether bacteria with higher cell-specific nucleic acid content (HNA) or an active electron transport system, i.e., positive for reduction of 5-cyano-2,3-ditolyl tetrazolium chloride (CTC), were responsible for the bulk of bacterioplankton metabolic activity. We also examined whether the phylogenetic diversity of HNA and CTC-positive cells differed from the...
Resource Type:: Article
Full Text:: Ecosystem K. Longnecker,* B. F. Sherr, and E. B. Sherr College of Oceanic and Atmospheric Sciences, Oregon

Creator:: Berman, T., Kaplan, B., Chava, S., Viner, Y., Sherr, Barry F., and Sherr, Evelyn
Abstract:: Three staining methods were used to identify metabolically active bacteria in Lake Kinneret, northern Israel: CTC, DAPI staining followed by a propanol wash, and the Molecular Probes Live/Dead stain. Positive results from these methods purport to show, respectively, actively respiring bacteria (CTC+), cells with intact nucleoids (NuCC), and cells with...
Resource Type:: Article
Full Text:: 2001 *E-mail: tberman@ocean.org.il Metabolically active bacteria in Lake Kinneret T. Berman1,*, B

Creator:: Suzuki, Marcelino T., Sherr, Evelyn, and Sherr, Barry F.
Abstract:: We compared estimates of bacterial abundance and of average bacterial cell size based on direct counts of bacterioplankton cells stained with acridine orange (AO) or 4’-6-diamidino-2-phenylidole (DAPI). Estimates of numbers mll–1 of bacteria stained with DAPI were on average 70% (range 57–82%) of bacterial counts made with AO as the...
Resource Type:: Article
Full Text:: SUZUKI, MARCELINO T., EVELYN B. SHERR, AND BARRY F. SHERR. DAPI

Creator:: Wolfe, Gordon V., Sherr, Evelyn, and Sherr, Barry F.
Abstract:: Degradation and release to solution of intracellular dimethylsulfoniopropionate (DMSP) from Emiliania huxleyi 370 was observed during grazing by the heterotrophic dinoflagellate Oxyrrhis marina in 24 h bottle incubations. Between 30 and 70 % of the lost algal DMSP was metabolized by the grazers without production of dimethylsulfide (DMS) when grazer...
Resource Type:: Article
Full Text:: b y Oxyrrhis marina Gordon V. Wolfe, Evelyn B. Sherr, Barry F. Sherr College of Oceanic and

Creator:: Tranvik, Lars J., Sherr, Evelyn, and Sherr, Barry F.
Abstract:: A variety of macromolecules labeled with FITC (fluorescein isothiocyanate), including carbohydrates (dextran) and proteins (ferritin, casein, albumin, concavalin A), spanning a range of molecular weights from 55 to 2000 kD, were actively ingested by marine heterotrophic flagellates at substrate concentrations of 1 to 10 mg/L. The uptake capacity for the...
Resource Type:: Article
Full Text:: flagellates in seawater Lars J. ~ r a n v i k ' , E. B. sherr2, B. F. sherr2 'Dept of Ecology, Limnology

Creator:: Gonzalez, Juan M., Sherr, Evelyn, and Sherr, Barry F.
Abstract:: Previous work has demonstrated selective feeding by bacterivorous protists on the of prey size. Other prey characteristics may also affect protist grazing rates. In this relative uptake rates of fluorescently labeled bacterial (FLB) cells made from starving bacteria (S-FLB), and of live-stained motile vs non-motile bacteria by marine We also...
Resource Type:: Article
Full Text:: starving, and on motile versus nonmotile, bacterial prey Juan M. Gonzalez*, Evelyn B. Sherr, Barry F

ScholarsArchive@OSU