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fossil diatom
Fossil diatom algae first found in the Paleogene marine succession (Alugivayam Formation) of the Il'pinskii Peninsula, northeastern Kamchatka are studied, and new data on molluscan assemblages from the same sequences are presented.
      
Fossil diatom assemblages preserved within the sedimentary record in Arctic lakes provide the potential to reconstruct past changes in important limnological variables.
      
Sediment records can be disturbed by erosional and redepositional events, which redeposit microfossils within a basin and may then lead to misinterpretations of fossil diatom assemblages.
      
Consequently, the fossil diatom data can be used to establish a continuous record of past climate variability over approximately the past 1300?years.
      
It has been thoroughly documented by the gradual change in the composition of the fossil diatom floras.
      
The relationship between fossil diatom assemblages and limnological conditions
      
Fossil diatom assemblages from the sediment/water interface in 105 Minnesota lakes were compared with measurements of alkalinity, sulphate, total phosphorus, transparency, and water depth at the sample site.
      
Stratigraphic analyses of the postglacial sediments of Little Round Lake and the recent sediments of two additional southern Ontario lakes were used to compare the relative abundance of fossil diatom frustules to chrysophycean statospores.
      
From these data it is seen that the ratio of fossil diatom frustules to chrysophycean statospores may provide a useful paleolimnological index of trophic status in temperate lakes.
      
The inferred pH history of the lake was recreated using the region-specific equation relating fossil diatom taxa to pH.
      
Fossil diatom inferred reconstruction of the pH history of two acidic, clear water lakes from insular Newfoundland, Canada
      
Many fossil diatom assemblages do not possess a direct modern analogue as a result of taphonomic processes and diagenesis within the assemblage.
      
Fossil diatom analyses of lake-sediment cores representing the last ~250 years of Lakes Oloidien and Sonachi in the Eastern (Gregory) Rift Valley of central Kenya yielded a new diatom species, described here as Staurophora caljonii spec.
      
Stratigraphical and fossil diatom studies based on a detailed radiocarbon chrnology revealed six phases in water-level changes and paleosalinity variations.
      
Principal component (PC) analysis of the fossil diatom assemblages in Piston Core KH99-3 ES samples from the subarctic Pacific was carried out to investigate the paleoceanographic conditions of the area.
      
The Climate and Salinity (CASPIA) Project is concerned with diatoms as environmental indicators in inland waters and their use in reconstructing salinity and major ion composition from fossil diatom assemblages in lake sediments.
      
This relationship is used to calibrate fossil diatom assemblages from a lake sediment core from the same lake to provide a quantitative index of water levels over the pastc.
      
This model may be used to derive paleotemperature inferences from fossil diatom assemblages at appropriate sites in the western Canadian Arctic.
      
The relationship between diatom assemblages and [TP] was sufficiently strong to warrant the development of a weighted-averaging (WA) regression and calibration model that can be used to infer past trophic status from fossil diatom assemblages.
      
The representative quality of fossil diatom assemblages in the recent sediment of a lake is compared with its contemporary diatom flora.
      
 

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