Differential effects of nitrogenous fertilizers on methane-consuming microbes in rice field and forest soilAnalysis of planktonic community structure and trophic interactions using refined isotopic signatures determined by combining fluorescence-activated cell sorting and isotope-ratio mass spectrometryDetermination of the carbon isotopic composition of whole/intact biological specimens using at-line direct thermal desorption to effect thermally assisted hydrolysis/methylationFlow cytometric detection of phosphatase activity combined with 13C-CO2 tracer-based growth rate assessment in phytoplankton populations from a shallow lakeUsing the hidden isotopic heterogeneity in phyto- and zooplankton to unmask disparity in trophic carbon transferLinking flow cytometric cell sorting and compound-specific 13C-analysis to determine population-specific isotopic signatures and growth rates in cyanobacteria-dominated lake plankton