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17
Decomposer biomass in the rhizosphere to assess rhizodeposition
- Oikos
, 2007
"... Quantification of the organic carbon released from plant roots is a challenge. These compounds of rhizodeposition are quickly transformed into CO2 and eventually bacterial biomass to be consumed by bacterivores (protozoa and nematodes). Microbes stimulate rhizodeposition several-fold so assays under ..."
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Cited by 5 (0 self)
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Quantification of the organic carbon released from plant roots is a challenge. These compounds of rhizodeposition are quickly transformed into CO2 and eventually bacterial biomass to be consumed by bacterivores (protozoa and nematodes). Microbes stimulate rhizodeposition several-fold so assays
1ARE SEDIMENT-INGESTING GIZZARD SHAD DETRITIVORES, BACTERIVORES OR HERBIVORES?
"... temperate freshwater ecosystems and, due to their high biomass, can influence ecosystem nutrient transport (Schaus et al. 1997). These fish “telescope ” the pelagic food web by feeding on detritus. Many detritivores ingest sediment, a nutritionally dilute diet, and glean their metabolic requirements ..."
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temperate freshwater ecosystems and, due to their high biomass, can influence ecosystem nutrient transport (Schaus et al. 1997). These fish “telescope ” the pelagic food web by feeding on detritus. Many detritivores ingest sediment, a nutritionally dilute diet, and glean their metabolic
Regulation of zooplankton biomass and production in a
"... Seasonal variation in species composition, biomass, and growth rate of ciliates was investigated in the southern Kattegat, Denmark. The biomass was dominated by the autotrophic Mesodinium rubrum and naked mixo- and heterotrophic oligotrich ciliates, while tintinnids were less abundant. The seasonal ..."
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Seasonal variation in species composition, biomass, and growth rate of ciliates was investigated in the southern Kattegat, Denmark. The biomass was dominated by the autotrophic Mesodinium rubrum and naked mixo- and heterotrophic oligotrich ciliates, while tintinnids were less abundant. The seasonal
Soil energy pathways of different ecosystems using nematode trophic group analysis: a meta analysis
- Nematology
"... Summary -We analysed 67 raw data sets of nematode genera from three types of ecosystems (grassland, cropland, and forest) to compare relative magnitude of energy pathways through the soil food web. Bacterial-, fungal-and herbivorous-based energy pathways were compared by percentages (in either abun ..."
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Cited by 1 (0 self)
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abundances or biomass) of three soil nematode trophic groups (i.e., bacterivore, fungivore and herbivore). The patterns of soil energy pathways were similar whether expressed as relative abundance or relative biomass. However, the percentage values of bacterivorous biomass in each type of ecosystem exceeded
The abundance, biomass and composition of pelagic ciliates in East African lakes of different salinity and trophy
"... Planktonic ciliates were studied in 17 tropical East African lakes of different salinity and trophic status. Oligotrichs (e.g., Strombidium, Strobilidium and Halteria) and scuticociliates (e.g., Cyclidium, Pleuronema, Cristigera), dominated the ciliate communities. Conductivity and trophic status we ..."
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a concentration and conductivity. On the other hand, the importance of scuticociliates (primarily bacterivores) increased with increasing chlorophyll a and conductivity. Mean ciliate abundance ranged from 2 to 1,220 ciliates.mL-1 while the biomass range was from 1.9 to 1, 900 µg C.L-1 respectively
Change of microplankton community structure in response to fertilization of an arctic lake
"... Microplankton in an oligotrophic arctic lake were assessed by direct counts for one summer prior to nutrient additions and three summers during which inorganic nitrogen and phosphorus were added to the lake at approximately ten times ambient loading rates. Protozoa increased significantly in both n ..."
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Cited by 2 (1 self)
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number and biomass following fertilization, and community structure changed from dominance by oligotrichs prior to fertilization to dominance by the bacterivorous peritrich Epistylis rotans in the second and third years of fertilization. Rotifer abundance and biomass was not significantly different among
Interactions between Eisenia andrei (Oligochaeta) and nematode populations during vermicomposting
, 2001
"... We studied the effect of the earthworm, Eisenia andrei, on the nematode community and on the microbial activity during the vermicomposting of two organic wastes, cow manure and sewage sludge. Fresh cow manure and sewage sludge was placed in five replicated boxes with and without earthworms for a per ..."
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Cited by 6 (0 self)
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period of 16 weeks. Samples were collected periodically and nematodes were extracted in Baermann funnels, counted and separated into different trophic groups. Samples were also analyzed for microbial respiration and microbial biomass nitrogen. Nematode communities were dominated by bac-terivores
Direct and Indirect Effects of Protist Predation on Population Size Structure of a Bacterial Strain with High Phenotypic Plasticity
, 2005
"... We studied the impact of grazing and substrate supply on the size structure of a freshwater bacterial strain (Flectobacillus sp.) which showed pronounced morphological plasticity. The cell length varied from 2 to>40 �m and encompassed rods, curved cells, and long filaments. Without grazers and wi ..."
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Cited by 6 (2 self)
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and with a sufficient substrate supply, bacteria grew mainly in the form of medium-sized rods (4 to 7 �m), with a smaller proportion (<10%) of filamentous forms. Grazing experiments with the bacterivorous flagellate Ochromonas sp. showed that freely suspended cells of <7 �m were highly vulnerable
Grazing in a porous environment: 1. The effect of soil pore structure on C and N mineralization. Plant Soil 212
, 1999
"... Abstract The porous soil environment constrains grazing of microorganisms by microbivorous nematodes. In particular, at matric potentials at which water-filled pore spaces have capillary diameters less than nematode body diameters the effect of grazing, e.g. enhanced mineralization, should be reduc ..."
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Cited by 2 (0 self)
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be reduced ('exclusion hypothesis') because nematodes cannot access their microbial forage. We examined C and N mineralization, microbial biomass C (by fumigationextraction), the metabolic quotient (C mineralization per unit biomass C), nematode abundance, and soil water content in intact soil
Nematode community changes associated with decomposition of Crotalaria juncea amendment in litterbags
, 2003
"... Effects of sunn hemp (Crotalaria juncea) residue (C:N = 18.9:1) decomposition on the dynamics of free-living nematodes involved in soil nutrient cycling were examined in plots planted with sweet corn (Zea mays). Abundance of bacterivorous and fungivorous nematodes in litterbags containing sunn hemp ..."
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Effects of sunn hemp (Crotalaria juncea) residue (C:N = 18.9:1) decomposition on the dynamics of free-living nematodes involved in soil nutrient cycling were examined in plots planted with sweet corn (Zea mays). Abundance of bacterivorous and fungivorous nematodes in litterbags containing sunn hemp
Results 1 - 10
of
17
