abstract：:The addition of ciliated protozoa to aquatic microcosms and bench-scale sewage treatment plants increases decomposition rates. This is surprising, inasmuch as protozoa consume bacteria, which are the primary decomposers. One possible mechanism of the increase in decomposition rate is the direct consumption of dissolve...

journal_title：Microbial ecology

authors： Glaser D

更新日期：1988-03-01 00:00:00

abstract：:The recovery of bdellovibrios from estuarine sediments over an annual cycle was studied. Greater numbers of the predators were recovered in sediment than in the water column. Increases in the number of bdellovibrios recovered from sediment over various periods of time suggest that multiplication of the predators occur...

journal_title：Microbial ecology

authors： Williams HN

更新日期：1988-01-01 00:00:00

abstract：:The microbial structure within, between, and over time in decaying cladodes of the common prickly pearOpuntia stricta was studied at each of two separate localities. In general, the effective number of yeast species and yeast species diversity increased as the rot aged to the observed maximum time of 4 weeks. Yeast he...

journal_title：Microbial ecology

authors： Barker JS,Starmer WT,Vacek DC

更新日期：1987-11-01 00:00:00

abstract：:The abundance of ultramicrobacteria (i.e., bacteria that pass through a 0.2μm filter) in a subtropical Alabama estuary was determined during a 1-year period. Although phenotypic and molecular characterization indicated that the population of ultramicrobacteria was dominated byVibrio species, species ofListonella andPs...

journal_title：Microbial ecology

authors： Hood MA,Macdonell MT

更新日期：1987-09-01 00:00:00

abstract：:Potential rates of nitrification and denitrification were measured in an oligotrophic sediment system. Nitrification potential was estimated using the CO oxidation technique, and potential denitrification was measured by the acetylene blockage technique. The sediments demonstrated both nitrifying and denitrifying acti...

journal_title：Microbial ecology

authors： Dodds WK,Jones RD

更新日期：1987-07-01 00:00:00

abstract：:TwoNostoc muscorum cyanophages were isolated from a domestic sewage in Kuwait. N-1L cyanophage had a hexagonal head with a long tail, while N-2S cyanophage was a short-tailed virus. N-1L cyanophage was active at 50°C and at acidic pH, compared with N-2S, which was more heat stable and active at pH 7.0. Seasonal variat...

journal_title：Microbial ecology

authors： Sallal AK,Nimr ND,Al-Sharif HF

更新日期：1987-05-01 00:00:00

abstract：:Cell growth and division of the ciliateTetrahymena corlissi were examined upon refeeding after prolonged starvation of up to 12 days. Division did not automatically occur when a certain critical cell size was reached. Rather, it varied both with the nutritional history of the cell and the nutrient conditions in which ...

journal_title：Microbial ecology

authors： Lynn DH,Montagnes DJ,Riggs W

更新日期：1987-03-01 00:00:00

abstract：:Different nominal molecular weight (nMW) fractions of DOC from a southeastern blackwater river were concentrated by ultrafiltration and added to sieved river water to assess each fraction's ability to stimulate bacterial growth. Bacterial growth was measured using change in bacterial biomass from direct counts and usi...

journal_title：Microbial ecology

authors： Meyer JL,Edwards RT,Risley R

更新日期：1987-01-01 00:00:00

abstract：:Diel changes in the specific growth rates of natural bacterial communities as a whole and of different groups within the communities were followed over 2 days during July 1982, in stratified waters in the vicinity of a shallow sea tidal mixing front in the Irish Sea. Waters well above (4 m) and below (60 m) the thermo...

journal_title：Microbial ecology

authors： Turley C,Lochte K

更新日期：1986-09-01 00:00:00

abstract：:Qualitative and quantitative investigations were made on the luminous bacteria associated with the gut of pond cultured milk fishChanos chanos. Significant differences in luminous bacterial numbers were found between gut and pond water and between gut and pond sediment, but not between pond water and sediment. No sign...

journal_title：Microbial ecology

authors： Ramesh A,Nandakumar R,Venugopalan VK

更新日期：1986-06-01 00:00:00

abstract：CONCLUSION:As the interactions between marine invertebrates and their bacterial commensals and symbionts are better understood, the application of biotechnology will enhance both environmental and economic benefit. In the immediate future, marine bacteria, either selected or genetically engineered, will play a signific...

journal_title：Microbial ecology

authors： Bonar DB,Weiner RM,Colwell RR

更新日期：1986-03-01 00:00:00

abstract：:Sulfate reduction activity (SRA) was measured via the radioactive tracer ((35)SO4 (=)) technique in sediment samples from the Canary Creek Marsh in Lewes, Delaware. Basal levels of SRA ranged from 130 to 319 nmoles of sulfate reduced/gram dry sediment/hour. With the exception of lactate and formate, all organic acids ...

journal_title：Microbial ecology

authors： Dicker HJ,Smith DW

更新日期：1985-12-01 00:00:00

abstract：:Regeneration of nutrients in aquatic ecosystems may be affected by autolysis, bacterial degradation, and activities of phagotrophic organisms. To examine the relative importance of these processes, mineralization of carbon, nitrogen, and phosphorus was studied in a two-stage continuous culture system. In the first sta...

journal_title：Microbial ecology

authors： Güde H

更新日期：1985-09-01 00:00:00

abstract：:Three dominant types of sugar-fermenting bacteria were isolated from the anaerobic, intertidal sediments of the Eems-Dollard estuary by applying techniques involving anaerobic agar shake tubes. One of the isolated types was tentatively identified as aStreptococcus species, the other two asBacteroides species. All type...

journal_title：Microbial ecology

authors： Laanbroek HJ,Blok JP,Steenhuis L

更新日期：1985-06-01 00:00:00

abstract：:Seven known species of rumen ciliates and mixedEntodinium spp. showed association with plant particles in rumen fluid in vitro. Association was greater with fresh particles than with hay, and substantially decreased when the water-soluble components of the particles were removed, suggesting that the water-soluble comp...

journal_title：Microbial ecology

authors： Orpin CG

更新日期：1985-03-01 00:00:00

abstract：:A survey was made of the yeast communities isolated from necrotic tissue of 4 species of prickly-pear cacti (Opuntia stricta, O. tomentosa, O. monacantha, andO. streptacantha) which have colonized in Australia. Yeast communities were sampled from a number of localities and at different times. Cactus specific yeasts ac...

journal_title：Microbial ecology

authors： Barker JS,East PD,Phaff HJ,Miranda M

更新日期：1984-12-01 00:00:00

abstract：:Growth kinetics of 2Nitrobacter strains (N.w. and L) coexisting in the same soil are studied in batch and continuous culture. Monod's parameters are estimated numerically from experimental data in the case of the batch experiment, and from steady-state equations in the case of the chemostat. In both cases, the 2 strai...

journal_title：Microbial ecology

authors： Gay G,Corman A

更新日期：1984-06-01 00:00:00

abstract：:Mathematical studies for ecosystems involving 2 predators competing for a growing prey population have shown that the 2 competitors can coexist in a state of sustained oscillations for a range of values of the system parameters. For the case of 1 suspension-feeding protozoan population, recent experimental observation...

journal_title：Microbial ecology

authors： Baltzis BC,Fredrickson AG

更新日期：1984-03-01 00:00:00

abstract：:By using substrate molecules of varying degrees of surface activity, we were able to measure some features of bacterial activity in the surface microlayers (SM) and in the subsurface (bulk) water. The fraction of active cells was determined by a combined microautoradiography-epifluorescence (ME) method. Measurements w...

journal_title：Microbial ecology

authors： Hermansson M,Dahlbäck B

更新日期：1983-12-01 00:00:00

abstract：:Five vessels, connected in series, were used for a continuous flow system to model carbon flow in anaerobic microbial communities. Two such 5-vessel systems were constructed, the inflows containing 10 mM sulfate and either 10 mM glucose or benzoate. Dilution was slow (D=0.0018 h(-1) for the whole system).Analyses of d...

journal_title：Microbial ecology

authors： Thompson LA,Nedwell DB,Balba MT,Banat IM,Senior E

更新日期：1983-10-01 00:00:00

abstract：:The abundance ofAeromonas hydrophila was measured monthly at 29 sites in Albemarle Sound, North Carolina and its tributaries from April 1977 through July 1979. Simultaneous measurements included heterotrophic plate count bacteria, fecal coliform bacteria, and 18 physical and chemical parameters. Using only 6 water qua...

journal_title：Microbial ecology

authors： Hazen TC

更新日期：1983-07-01 00:00:00

abstract：:Experimental studies of a microbial food chain involving organic carbon substrates,Enterobacter aerogenes, and ciliate protozoansParamecium primaurelia andDldinium nasutum were conducted in stirred, aerated batch cultures. Quantitative measurements were made of organic carbon levels and of cell numbers, mean cell volu...

journal_title：Microbial ecology

authors： Graham JM,Canale RP

更新日期：1982-12-01 00:00:00

abstract：:Aeromonas species were recovered from over 27% of 183 chlorinated drinking water samples collected during an 18-month period. Sixteen of 20 isolates tested elicited a cytotoxic response by Y-1 mouse adrenal cells. None of the strains was either enterotoxigenic by the rabbit ligated ileal loop assay, exhibited piliatio...

journal_title：Microbial ecology

authors： Lechevallier MW,Evans TM,Seidler RJ,Daily OP,Merrell BR,Rollins DM,Joseph SW

更新日期：1982-12-01 00:00:00

abstract：:Electron transport system (ETS) activity was measured in amended and nonamended soil by measuring the reduction of 2-(p-iodophenyl)-3-(p-nitrophenyl)-5-phenyl tetrazolium chloride (INT) to iodonitrotetrazolium formazan (INT-formazan), which can be easily extracted with methanol without interference from other compound...

journal_title：Microbial ecology

authors： Trevors JT,Mayfield CI,Inniss WE

更新日期：1982-10-01 00:00:00

abstract：:Yeast communities of decayingStenocereus gummosus were analyzed for spatial, temporal, and physiological characteristics. Analysis of random samples within plants, between plants, and between localities shows that the species proportions of the yeast community are relatively constant within plants and between localiti...

journal_title：Microbial ecology

authors： Starmer WT

更新日期：1982-06-01 00:00:00

abstract：:Interactions between bacteria and protozoa in soil were studied over 2-week periods in the field and in a pot experiment. Under natural conditions the total biological activity was temporarily synchronized by a large rainfall, and in the laboratory by the addition of water to dried-out soil, with or without plants. In...

journal_title：Microbial ecology

authors： Clarholm M

更新日期：1981-12-01 00:00:00

abstract：:The internal colony-forming bacterial flora of the schistosome intermediate host snailBiomphalaria glabrata (Say) has been characterized in ca. 500 individual snails from Puerto Rico, Guadeloupe, and St. Lucia, and from laboratory aquaria. Freshly captured wild snails harbor 2-40×10(6) CFU·g(-1), and healthy aquarium ...

journal_title：Microbial ecology

authors： Ducklow HW,Clausen K,Mitchell R

更新日期：1981-09-01 00:00:00

abstract：:The predatory activity of bdellovibrios is affected by various environmental pollutants such as detergents, heavy metals, and pesticides. This was shown in a two-membered system ofBdellovibrio andPhotobacterium, in which the effect of the predator on the bioluminescence of the prey indicated the activity of the former...

journal_title：Microbial ecology

authors： Varon M,Shilo M

更新日期：1981-06-01 00:00:00

abstract：:A significant number of viable colony-forming bacteria were recovered from deep-ocean bottom water samples passed through a 0.45μm filter. However, these bacteria small enough to pass through a 0.45μm membrane filter and termed "filterable bacteria" were less abundant in open-ocean surface water and coastal water samp...

journal_title：Microbial ecology

authors： Tabor PS,Ohwada K,Colwell RR

更新日期：1981-03-01 00:00:00

abstract：:Nitrogen fixation (C2H2 reduction) by epiphylls on coffee,Coffea arabica, grown in sites with different degrees of shade, was determined. Coffee leaves with nitrogen-fixing epiphylls were found in all sites in approximately equal numbers. Rates of C2H2 reduction were similar for all sites and throughout the year, aver...

journal_title：Microbial ecology

authors： Roskoski JP

更新日期：1980-12-01 00:00:00

abstract：:High specific activity(14)C-labeled glucose, succinate, acetate, salicylate, and amino acids were used to examine carbon metabolism by the microbial community of Pahokee muck (aLithic medisaprist), a drained, cultivated soil of the Florida Everglades. Variations in carbon oxidation were observed from the end of the we...

journal_title：Microbial ecology

authors： Tate RL 3rd

更新日期：1980-12-01 00:00:00

abstract：:Transect studies were conducted to determine the relative effects of zinc, lead, and cadmium pollution on microorganisms occurring on hawthorn leaves at varying distances from a smelting complex.Sporobolomyces roseus was absent from the most heavily contaminated leaves but, although lead was inhibitory, other environm...

journal_title：Microbial ecology

authors： Bewley RJ,Campbell R

更新日期：1980-09-01 00:00:00

abstract：:The source of combined nitrogen in endolithic microbial communities was studied in samples from desert localities in North and South America, the Middle East, South Africa, and Antarctica. Nitrogen fixation (acetylene reduction) seems to occur only exceptionally. Evidence suggests that, in general, the nitrogen source...

journal_title：Microbial ecology

authors： Friedmann EI,Kibler AP

更新日期：1980-06-01 00:00:00

abstract：:The quantitative uptake of latex beads of different sizes and of live cells by 14 species of ciliates was studied. The functional response (uptake rate as function of food particle concentration) can be fitted to a hyperbolic function and this can be explained in terms of the function of the mouth apparatus. Each spec...

journal_title：Microbial ecology

authors： Fenchel T

更新日期：1980-03-01 00:00:00

abstract：:The marine chrysophyteMonochrysis lutheri was grown in phosphorus-limited continuous cultures at temperatures of 15°, 18.8° and 23°C. The effect of temperature on the maximum growth rate was well-defined by the Arrhenius equation, but the Q10 for this alga (1.7) was somewhat lower than has been determined previously f...

journal_title：Microbial ecology

authors： Goldman JC

更新日期：1979-09-01 00:00:00

abstract：:Adenosine triphosphate in soil is measured by the luciferin-luciferase bioluminescence method. Cation exchange in the ATP extraction procedure is used to reduce the content of, e.g., Fe, Al, and Cations in extracts. The efficiency of the cation exchange is determined by measuring the concentration of Fe by X-ray fluor...

journal_title：Microbial ecology

authors： Eiland F,Nielsen BS

更新日期：1979-06-01 00:00:00

abstract：:Ochreous sludge deposited in the course of aeration of ground water contained an assortment of bacterial forms and structures which were investigated by light microscopy, scanning electron microscopy, and transmission electron microscopy. Bacterial structures were often covered by iron deposition which could be remove...

journal_title：Microbial ecology

authors： Tuovinen OH,Nurmiaho EL

更新日期：1979-03-01 00:00:00

abstract：:Montmorillonitic clay influences the biological control ofEscherichia coli in aquatic systems, the magnitude of the effects being dependent on the state of the clay and the type of host-antagonist interaction. The interaction ofBdellovibrio andE. coli was partially inhibited by the presence of montmorillonite. Because...

journal_title：Microbial ecology

authors： Roper MM,Marshall KC

更新日期：1977-12-01 00:00:00

abstract：:A new membrane filter technique for field use was developed for the enumeration of either aerobic or anaerobic, autotrophic, sulfur-oxidizing bacteria in waters and soils. Immediately after collection, samples were filtered through sulfur-coated filters and incubated in selective media. Acidification or gas evolution ...

journal_title：Microbial ecology

authors： Mouraret M,Baldensperger J

更新日期：1977-12-01 00:00:00

abstract：:The growth rate or numerical response of five species of bactivorous ciliates to the abundance ofEnterobacter aerogenes was examined in monoxenic culture. The ciliatesColpidium campylum, C. colpoda, Glaucoma scintillons, G. frontata, andCyclidium glaucoma were isolated from a small pond. Four were grown in shaken cult...

journal_title：Microbial ecology

authors： Taylor WD

更新日期：1977-09-01 00:00:00