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    Barry Sherr

    Barry Sherr photo
    Professor Emeritus
    Discipline: Ocean Ecology and Biogeochemistry
    Email: sherrb@coas.oregonstate.edu

    Research Interests

    Aquatic microbial ecology; roles of microbes in ecosystem processes; carbon-energy flux through pelagic food webs; biololgy and ecology of phagotrophic protists; methods and development.

    Current Research

    Trophic interactions between bacterioplankton and phagotrophic protists; rates of herbivory by flagellate and ciliate grazers; controls of activity and growth of bacterioplankton; microbial ecology of the Arctic Ocean.


    BA, Kansas Wesleyan University, 1965
    MA, University of Kansas, 1970
    PhD, University of Georgia, 1977


    2001 to present:

    Sherr B.F., E.B. Sherr, and P. del Giorgio. 2001. Enumeration of total and highly active bacteria, pp.129-159, in: J. Paul (ed), Methods in Microbiology, Volume 30: Marine Microbiology. Academic Press, London.

    Sherr, E.B. and B.F. Sherr. 2001. Phagotrophy in aquatic microbial food webs. pp. 409-418, in S. Newell (ed) Manual of Environmental Microbiology II. ASM Press, Washington, D.C.

    Sherr, E.B. Sherr, B.F. and T. Cowles. 2001 Mesoscale variability in bacterial activity in the Northeast Pacific off Oregon, USA. Aquatic Microbial Ecology 25:21-30. [see PDF]

    Berman, T., Kaplan, B., Chava, S., Viner, Y., Sherr, B.F., and Sherr, E.B. 2001. Metabolically active bacteria in Lake Kinneret. Aquatic Microbial Ecology. 23:213-224. [see PDF]

    Sherr, E.B., Sherr, B.F., and P.G. Verity. 2002. Distribution and relation of total bacteria, active bacteria, bacterivory, and volume of organic detritus in Atlantic continental shelf waters off Cape Hatteras NC, USA. Deep-Sea Research II 49:4571-4585. [see abstract]

    Sherr, E.B. and B.F. Sherr. 2002. Significant of predation by protists in aquatic microbial food webs. Antonie Van Leewenhoek International Journal of General and Molecular Microbiology 81:293-308. [see PDF]

    Sherr, E.B., Sherr, B.F., Wheeler, P.A., Thompson, K. 2003. Temporal and spatial variation in stocks of autotrophic and heterotrophic microbes in the upper water column of the central Arctic Ocean. Deep-Sea Research I, 50:557-571. [see PDF]

    Sherr, B.F., Sherr, E.B. 2003. Community respiration/production and bacterial activity in the upper water column of the central Arctic Ocean. Deep-Sea Research I, 50:529-542. [see PDF]

    Sherr, E.B., Sherr, B.F., Wheeler, P.A. Submitted. Distribution of coccoid cyanobacteria and small eukaryotic phytoplankton in the upwelling ecosystem off the Oregon coast during 2001 and 2002. submitted to Deep-Sea Research II, 7/03 [see PDF]

    Longnecker, K., E.B. Sherr, B.F. Sherr. Submitted. Cell-specific rates of leucine incorporation by HNA, LNA, and CTC-positive bacterioplankton in an upwelling ecosystem. Submitted to Aquatic Microbial Ecology 11/2003 [see PDF]


    Capriulo, G., B. Sherr, and E. Sherr. 1991. Trophic behavior and related community feeding activities of heterotrophic marine protists. NATO ASI Series Symposium Volume, Protozoa and their Role in Marine Processes. Springer-Verlag. Series G: Ecological Sciences Vol.25.

    Sherr, E.B. and B.F. Sherr. 1991. Planktonic microbes: tiny cells that support the ocean's food webs. Trends in Ecology and Evolution 6:50-54.

    Sherr, E.B., B.F. Sherr, and J. McDaniel. 1991. Clearance rates of < 6 mm fluorescently labeled algae (FLA) by estuarine protozoa: potential grazing impact of flagellates and ciliates. Mar. Ecol. Prog. Ser. 69:81-92.

    Sherr, B.F. and E.B. Sherr. 1991. Proportional distribution of total numbers, biovolume, and bacterivory among size classes of 2-20 mm nonpigmented marine flagellates. Marine Microbial Food Webs. 5:227-237.

    Sherr, E., B. Sherr, T. Berman and O. Hadas. 1991. High abundance of picoplanktivorous ciliates during late fall in Lake Kinneret, Israel. J. Plank. Res. 13:789-812.

    Sherr, B.F. and E.B. Sherr. 1992. Determination of phagotrophic protist feeding rates in situ. Chapter B-13. in: J.J. Lee and A. Soldo (eds), Protocols in Protistology. Society of Protozoologists.

    Sherr, E.B. and B.F. Sherr. 1992. Trophic roles of pelagic protists: phagotrophic flagellates as herbivores. Arch. Hydrobiol. Beih. Ergebn. Limnol. 37:165-172.

    Sherr, B.F., E.B. Sherr, and J. McDaniel. 1992. Effect of protistan grazing on the frequency of dividing cells (FDC) in bacterioplankton assemblages. Appl. Environ. Microbiol. 58:2381-2385.

    Sherr, E.B. and B.F. Sherr. 1993. Preservation and storage of samples for enumeration of heterotrophic protists. p. 207-212, In: P. Kemp, B. Sherr, E. Sherr, and J. Cole (eds), Current Methods in Aquatic Microbial Ecology, Lewis Publ., NY.

    Sherr, E.B., D.A. Caron, and B.F. Sherr. 1993. Staining of heterotrophic protists for visualization via epifluorescence microscopy. p. 213-228, In: P. Kemp, B. Sherr, E. Sherr, and J. Cole (eds), Current Methods in Aquatic Microbial Ecology, Lewis Publ., NY.

    Sherr, E.B. and B.F. Sherr. 1993. Protistan grazing rates via uptake of fluorescently labeled prey. p. 695-702, In: P. Kemp, B. Sherr, E. Sherr, and J. Cole (eds), Current Methods in Aquatic Microbial Ecology, Lewis Publ., NY.

    Kemp, P., B. Sherr, E. Sherr, and J. Cole (eds). 1993. Current Methods in Aquatic Microbial Ecology, Lewis Publ., NY.

    Tranvik, L.J., E.B. Sherr and B.F. Sherr. 1993. Uptake and utilization of "colloidal DOM" by heterotrophic flagellates in seawater. Mar. Ecol. Prog. Ser. 92:301-309.

    Suzuki, M.T., E.B. Sherr, and B.F. Sherr. 1993. DAPI direct counting underestimates bacterial abundance and average cell size. Limnol. Oceanogr. 38:1556-1570.

    Gonzalez, J.M., B.F. Sherr, and E.B. Sherr. 1993. Digestive enzyme activity as a quantitative measure of protistan grazing: The acid lysozyme assay for bacterivory. Mar. Ecol. Prog. Ser. 100:197-206.

    Gonzalez, J.M., E.B. Sherr, and B.F. Sherr. 1993. Differential grazing by marine flagellates of growing vs starving bacteria, and on motile vs non-motile bacteria. Mar. Ecol. Prog. Ser. 102:257-267.

    Keller, M.D., L.P. Shapiro, E.M. Haugen, T.L. Cucci, E.B. Sherr, B.F. Sherr. 1994. Phagotrophy of fluorescently labeled bacteria by an oceanic phytoplankter. Microb. Ecol. 28:39-52.

    Wolfe, G.V., E.B. Sherr and B.F. Sherr. 1994. Release and consumption of DMSP from Emiliania huxleyi during grazing by Oxyrrhis marina. Mar. Ecol. Prog. Ser. 111:111-119.

    Sherr, E.B. and B.F. Sherr. 1994. Bacterivory and herbivory:key roles of phagotrophic protists in pelagic food webs. Microb. Ecol. 28:223-235.

    Suzuki, M.T., E.B. Sherr and B.F. Sherr. 1996. Estimation of ammonium regeneration efficiencies associated with bacterivory in pelagic food webs via a 15N tracer method. J. Plank. Res. 18:411-428.

    Verity, P.G., G.-A. Paffenhofer, D. Wallace, E. Sherr and B. Sherr. 1996. Composition and biomass of plankton in spring on the Cape Hatteras Shelf, with implications for carbon flux. Continental Shelf Res. 16:1087-1116.

    Sherr, E.B. and B.F. Sherr. 1996. Phagotrophy in aquatic microbial food webs. In: C. Hurst (ed), Manual of Environmental Microbiology, Vol. II., Chapter 32.

    Sherr, E.B. and B.F. Sherr. 1996. Temporal offset in oceanic production and respiration processes implied by seasonal changes in atmospheric oxygen: the role of heterotrophic microbes. Aquat. Microb. Ecol. 11:91-100.

    Choi, J.W., E.B. Sherr, and B.F. Sherr. 1996. Relation between presence/absence of a visible nucleoid and metabolic activity in bacterioplankton cells. Limnol. Oceanogr. 41:1161-1168.

    Wolfe, G. V., and M. Steinke. 1996. Grazing-activated production of dimethyl sulfide (DMS) by two clones of Emiliania huxleyi. Limnol. Oceanogr. 41: 1151-1160.

    Wolfe, G. V., M. Steinke, and G. O. Kirst. 1997. Grazing-activated chemical defense in a unicellular marine alga. Nature 387: 894-897. [see PDF]

    Sherr, E.B., B.F. Sherr and L. Fessenden. 1997. Heterotrophic protists in the central Arctic Ocean. 1997. Deep-Sea Res.II 48:1665-1682. [see abstract]

    Rich, J., D.L. Kirchman, M. Gosselin, E. Sherr and B. Sherr. 1997. High bacterial production, uptake and concentrations of dissolved organic matter in the central Arctic Ocean. Deep-Sea Research II 44:1645-1664. [see abstract]

    Choi, J., B.F. Sherr, and E.B. Sherr. Dead or alive? 1999. A large fraction of ETS-inactive marine bacterioplankton cells, as assessed by reduction of CTC, can become ETS-active with incubation and substrate addition. Aquatic Microbial Ecology 18:105-115. [see abstract]

    Sherr, B.F., P. del Giorgio, and E. B. Sherr. 1999. Estimating abundance and single-cell characteristics of actively respiring bacteria via the redox dye, CTC. Aquatic Microbial Ecology 18:117-131. [see abstract]

    Sherr E.B. and B.F. Sherr. 1999. Glucosaminidase activity in marine microbes. FEMS Microbial Ecology 28:111-119.

    Sherr, E, B. Sherr and C.T. Sigmon. 1999. Activity of marine bacteria under incubated and in situ conditions. Aquatic Microbial Ecology 20:213-223. [see abstract]

    Suzuki, M.T. 1999. Effect of protistan bacterivory on coastal bacterioplankton diversity. Aquatic Microbial Ecology 20:261-272. [see abstract]

    Sherr, E.B. and B.F. Sherr. 2000. Problems with enzyme-based methods: A reply to the comment of J. Vrba. FEMS Microbial Ecology 1145:1-3.

    Sherr B.F. and E.B. Sherr. 2000. Marine Microbes: an Overview, p. 13-46. in: D. Kirchman (ed) Microbial Ecology of the Oceans. Wiley-Liss, New York.

    Sherr E.B. and B.F. Sherr. 2000. Microbial activity in aquatic systems from cell to biosphere. Microbial Biosystems: New Frontiers, p. 17-24. Proceedings of the 8th International Symposium of Microbial Ecology, Halifax, NS August 1998.


    Sherr, B.F., E.B. Sherr, and T. Berman. 1982. Decomposition of organic detritus: a selective role for microflagellate protozoa. Limnol. Oceanogr. 27:765-769. [see pdf]

    Sherr, E.B., B.F. Sherr, T. Berman, and J.J. McCarthy. 1982. Differences in nitrate and ammonia uptake activity among components of a freshwater phytoplankton community. J. Plank. Res. 4:961-965.

    Sherr, B.F., and E.B. Sherr. 1983. Grazing, growth, and ammonia excretion rates of a heterotrophic microflagellate fed four species of bacteria. Appl. Environ. Microbiol. 45:1196-1201.

    Newell, S.Y., B.F. Sherr, E.B. Sherr, and R.D. Fallon. 1983. Bacterial response to presence of eukaryote inhibitors in water from a coastal marine environment. Mar. Environ. Res. 10:147-157.

    Sherr, E.B., and B.F. Sherr. 1983. A double-staining epifluorescence technique to assess frequency of dividing cells and bacterivory in natural populations of heterotrophic microprotozoa. Appl. Environ. Microbiol. 46:1388-1393.

    Sherr, B.F., E.B. Sherr, and S.Y. Newell. 1984. Abundance and productivity of heterotrophic nanoplankton in Georgia coastal waters. J. Plank. Res. 6:195-202.

    Sherr, B.F., and E.B. Sherr. 1984. The role of heterotrophic protozoa in carbon and energy flow in aquatic ecosystems. pp. 412-423. In: M.J. Klug and C.A. Reddy (eds.), Current Perspectives in Microbial Ecology. Am. Soc. Microbiol. Washington, D.C.

    Berman, T., B. Sherr, E. Sherr, D. Wynne, and J. McCarthy. 1984. The characteristics of ammonia and nitrate uptake by phytoplankton in Lake Kinneret. Limnol. Oceanogr. 29:287-297.

    Pomeroy, L.R., R.B. Hanson, P.A. McGillivary, B.F. Sherr, D. Kirchman, and D. Deibel. 1985. Microbiology and chemistry of fecal products of pelagic tunicates: rates and fates. Bull. Mar. Sci. 35: 426-439.

    Porter, K.G., E.B. Sherr, B.F. Sherr, M. Pace, and R.W. Sanders. 1985. Protozoa in planktonic food webs. J. Protozool. 32:409-415.

    Sherr, E.B., B.F. Sherr, R.D. Fallon, and S.Y. Newell. 1986. Small aloricate ciliates as a major component of the marine heterotrophic nanoplankton. Limnol. Oceanogr. 31:177-183.

    Sherr, E.B., B.F. Sherr, and G. Paffenhofer. 1986. Phagotrophic protozoa as food for metazoans: A "missing" link in marine pelagic food webs? Mar. Microb. Food Webs. 1:61-80.

    Fallon, R.D., S.Y. Newell, B.F. Sherr, and E.B. Sherr. 1986. Factors affecting bacterial biomass and growth in the Duplin River Estuary and coastal Atlantic Ocean. CNRS-IFREMER, Actes de Colloques 3:137-145.

    Sherr, B.F., E.B. Sherr, T.L. Andrew, R.D. Fallon, and S.Y. Newell. 1986. Trophic interactions between heterotrophic Protozoa and bacterioplankton in estuarine water analysed using selective metabolic inhibitors. Mar. Ecol. Prog. Ser. 32:169-180.

    Sherr, E.B., B.F. Sherr, and L. Albright. 1987. Bacteria: link or sink? Science 235:88 (technical comment).

    Sherr, E.B., and B.F. Sherr. 1987. High rates of consumption of bacteria by pelagic ciliates. Nature 325:710-711.

    Sherr, B.F., E.B. Sherr, and R.D. Fallon. 1987. Use of monodispersed, fluorescently labeled bacteria to estimate in situ protozoan bacterivory. Appl. Environ. Microbiol. 53:958-965.

    Albright, L., E.B. Sherr, B.F. Sherr, and RD Fallon. 1987. Grazing of ciliated protozoa on free or particle-attached bacteria. Mar. Ecol. Prog. Ser. 38:125-129.

    Sherr, B.F., E.B. Sherr, and C.S. Hopkinson. 1988. Trophic interactions within pelagic microbial food webs: indications of feedback regulation of carbon flow. Hydrobiologia 159:19-26.

    Hopkinson, C.S., B.F. Sherr and H.W. Ducklow. 1988. Microbial regeneration of ammonium in the water column of Davies Reef, Australia. Mar. Ecol. Prog. Ser. 41:147-153.

    Sherr, B.F., E.B. Sherr, and F. Rassoulzadegan. 1988. Rates of digestion of bacteria by marine phagotrophic protozoa:temperature dependence. Appl. Environ. Microbiol. 54:1091-1095.

    Sherr, E.B. and B.F. Sherr. 1988. Role of microbes in pelagic food webs: a revised concept. Limnol. Oceanogr. 33:1225-1227.(see pdf)

    Newell, S.Y., R.D. Fallon, B.F. Sherr, and E.B. Sherr. 1988. Mesoscale temporal variation in bacterial standing crop, percent active cells, productivity and output in a salt-marsh tidal river. Verhandlungen Congr. S.I.L. 23:1839-1845.

    Hopkinson, C.S., B.F. Sherr, and W.J. Wiebe. 1989. Size fractionated coastal plankton metabolism. Mar. Ecol. Prog. Ser. 51:155-166.

    Sherr, E.B., F. Rassoulzadegan, and B.F. Sherr. 1989. Bacterivory by pelagic choreotrichous ciliates in coastal waters of the NW Mediterranean Sea. Mar. Ecol. Prog. Ser. 55:235-240.

    Sherr, B.F., E.B. Sherr, and C. Pedros-Alio. 1989. Simultaneous measurements of rates of bacterioplankton production and protozoan bacterivory in estuarine water. Mar. Ecol. Prog. Ser. 54:209-219.

    Sherr, B. F. and E.B. Sherr. 1989. Trophic impacts of phagotrophic protozoa in pelagic foodwebs. p. 388-393. Recent Advances in Microbial Ecology, Proceedings of the 5th International Symposium on Microbial Ecology, Japan Scientific Societies Press.

    Gonzalez, J., E.B. Sherr, and B.F. Sherr. 1990. Size-selective grazing by phagotrophic flagellates and ciliates on bacteria. Appl. Environ. Microbiol. 56:583-589.

    Pre-1982 papers:

    Balderston, W.L., B.F. Sherr, and W.J. Payne. 1976. Blockage of acetylene of nitrous oxide reduction in Pseudomonas perfectomarinus. Appl. Environ. Micro. 31:504 508.

    Chalmers, A.G., E.B. Haines and B.F. Sherr. 1976. Capacity of a Spartina salt marsh to assimilate nitrogen from secondarily treated sewage. EnvironmentalResources Center Tech. Report ERC 0776. Georgia Inst. of Technology.

    Haines, E., A. Chalmers, R. Hanson, and B. F. Sherr. 1977. Nitrogen pools and fluxes in a Georgia salt marsh. pp. 241 254. In: M. Wiley (ed.), Estuarine Processes, Vol. II, Academic Press, N.Y.

    Rowe, J.J., B.F. Sherr, W.J. Payne, and R.G. Eagon. 1977. A unique oxide binding complex formed by denitrifying Pseudomonas aeruginosa. Biochem. Biophys. Res. Comm. 77:253 258.

    Tenore, K.R., C.F. Chamberlain, W.M. Dunstan, R.B. Hanson, B.F. Sherr, and T.J. Tietjen. 1978. Possible effects of Gulf Stream intrusions and coastal runoff on the benthos of the continental shelf of the Georgia Bight. pp. 577 598. In: M.L. Wiley (ed.), Estuarine Interactions, Academic Press, N.Y.

    Sherr, B.F., and W.J. Payne. 1978. Effect of the Spartina alterniflora root rhizome system on salt marsh soil denitrifying bacteria. Appl.Environ. Micro. 35:724 729.

    Zumft, W.G., B.F. Sherr, and W.J. Payne. 1979. A reappraisal of the nitric oxide binding protein of denitrifying Pseudomonas. Biochem. Biophys. Res. Comm. 88:1230 1236.

    Payne, W.J., B.F. Sherr, and J.J. Rowe. 1979. Denitrification: A plea for attention. Proc. 3rd Inter. Symp. on N2 Fixation. Madison, Wisconsin. Univ. Maryland Press, College Park, MD.

    Sherr, B.F., and W.J. Payne. 1979. The role of the salt marsh grass, Spartina alterniflora, in the response of the solid denitrifying bacteria to glucose enrichment. Appl. Environ. Micro. 38:747 748.

    Sherr, B.F., and W.J. Payne. 1981. The effect of sewage sludge on salt marsh denitrifying bacteria. Estuaries 4:146 149.

    Payne, W.J., B.F. Sherr, and A.G. Chalmers. 1981. Nitrification denitrification associated with plant roots. In: Voss and Ruschel (eds.), Associative N2 Fixation. C.R.C. Press.

    Wiebe, W.J., R.R. Christian, J.A. Hansen, G. King, B.F. Sherr, and G. Skyring. 1981. Anaerobic respiration and fermentation. pp. 137 159. In: L.R. Pomeroy and R.G. Wiegert (eds.), The Ecology of a Salt Marsh. Springer Verlag, New York.

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