M Troussellier,P Legendre
M Troussellier
Microbial ecologists attempting to describe community structures through the use of synthetic parameters face enormous difficulties. These stem in part from the necessity of using standard taxonomic reference levels in a field where the spe...
Ecological study of twoNitrobacter serotypes coexisting in the same soil [0.03%]
土壤中两种亚硝化细菌菌型共存的生态学研究
A Josserand,G Gay,G Faurie
A Josserand
The problem of competition betweenNitrobacter strains was posed by the fact that two serotypes (N.w and L) coexisted in a soil, as shown by immunofluorescence. The L serotype had a lower growth rate in pure culture than serotype N.w, as wel...
Ecology of bacterial communities in the schistosomiasis vector snailBiomphalaria glabrata [0.03%]
椎实螺(Biomphalaria glabrata)细菌群落的生态学研究
H W Ducklow,K Clausen,R Mitchell
H W Ducklow
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. ...
Contribution of periphytic bacteria to the concentration of chromium in the crabHelice crassa [0.03%]
附着细菌对招潮蟹Helice crassa体内铬浓度的贡献
I Johnson,N Flower,M W Loutit
I Johnson
Periphytic bacteria found on the carapace and gills of crabs collected from near a tannery effluent outlet were shown to be able to concentrate chromium. By concentrating Cr, the bacteria contributed to the total Cr concentration of the cra...
Characteristics of the heterotrophic bacterial populations in hypersaline environments of different salt concentrations [0.03%]
不同盐浓度的高盐环境中的异养细菌群体特征分析
F Rodriguez-Valera,F Ruiz-Berraquero,A Ramos-Cormenzana
F Rodriguez-Valera
Solar salterns, based on a multi-pond system, give a discontinuous gradient of salt concentrations. The heterotrophic bacterial populations of ponds containing from 10% salt to saturation have been studied. Saltern samples were spread on ag...
J M Lynch,L M Panting
J M Lynch
The fumigation/respiration technique was used to estimate the size of the soil microbial biomass. Sieving decreased the biomass in winter but increased it in summer; we suggest that this was a consequence of the different substrates availab...
D Lauffenburger,R Aris,K H Keller
D Lauffenburger
A spatially distributed mathematical model is developed to elucidate the effects of chemical diffusion and cell motility as well as cell growth, death, and substrate uptake on steady-state bacterial population growth in a finite, one-dimens...
Competition between heterotrophic and autotrophic microplankton for dissolved nutrients [0.03%]
异养和自养微浮游生物之间对于溶解营养物质的竞争
E J Brown,D K Button,D S Lang
E J Brown
When a heterotrophic (Rhodotorula rubra) and a phototrophic (Selenastrum capricornutum) plankton were grown together in dilute phosphate (Pi) continuous cultures, coexistence occurred only when the heterotroph was growthrate limited by orga...
Effects of cadmium and copper on the ultrastructure ofAnkistrodesmus braunii andAnabaena 7120 [0.03%]
镉和铜对 Ankistrodesmus braunii 和 Anabaena 7120 超微结构的影响
A Massalski,V M Laube,D J Kushner
A Massalski
The effects of brief exposure to, or growth in the presence of, lethal and sublethal concentrations of Cu(NO)2 and Cd(NO3) on the ultrastructure of the blue-green algaAnabaena 7120 and the green algaAnkistrodesmus braunii were studied. Expo...
J D Hauxhurst,T Kaneko,R M Atlas
J D Hauxhurst
Taxonomic diversity, physiological tolerance ranges, and nutrient utilization capabilities were determined for bacterial communities in Gulf of Alaska surface waters and sediments. Taxonomic diversity was assessed using Shannon Weaver (H') ...