Role of allochthonous and autochthonous dissolved organic matter (DOM) as a carbon source for bacterioplankton in boreal humic
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منابع مشابه
Characteristics of dissolved organic matter in Baltic coastal sea ice: allochthonous or autochthonous origins?
The origin of dissolved organic matter (DOM) within sea ice in coastal waters of the Baltic Sea was investigated using parallel factor (PARAFAC) analysis of DOM fluorescence. Sea ice DOM had distinctly different fluorescence characteristics than that of the underlying humic-rich waters and was dominated by protein-like fluorescence signals. PARAFAC analysis identified five fluorescent component...
متن کاملVariability in Terrestrial and Microbial Contributions to Dissolved Organic Matter Fluorescence in the Edwards Aquifer, Central Texas
Most cave and karst ecosystems are believed to be dependent on an influx of allochthonous organic carbon. Although microbes are largely responsible for the fate of dissolved organic matter (DOM) in karst, the role of microbes in chemosynthetic (autochthonous) production and processing of DOM has received limited attention. Chromophoric dissolved organic matter (CDOM) is the fraction of DOM that...
متن کاملDifferential effect of algal- and soil-derived dissolved organic matter on alpine lake bacterial community composition and activity
We studied the effects of algaland soil-derived dissolved organic matter (DOM) enrichments on the activity and community composition of bacterioplankton in an alpine lake. The effects of the DOM source on bacteria were tested by establishing dilution cultures amended with either an algal lysate or with a soil extract. Cultures were incubated for 6 days under close to in situ conditions, and cha...
متن کاملRadiotracer study of phosphorus uptake by plankton and redistribution in I&he water column of a small humic lake
The movement of P in the plankton of a humic lake was studied in late July within a 2-m-diameter tube. The tube enclosed water from the surface to below the epilimnion with the steep vertical stratification of the lake undisturbed. [“2P]orthophosphate was mixed into the epilimnion of the enclosure and its fate followed for 2 weeks. In the epilimnion -85% of all the P in organisms was in Daphnia...
متن کاملAssessing the dynamics of dissolved organic matter (DOM) in coastal environments by excitation emission matrix fluorescence and parallel factor analysis (EEM-PARAFAC)
The distributions of fluorescent components in dissolved organic matter (DOM) from Ise Bay, Japan, were determined by excitation emission matrix (EEM) fluorescence spectroscopy combined with parallel factor analysis (PARAFAC). Three terrestrial humic-like, one marine humic-like, and three non–humic-like fluorescent components were identified by PARAFAC, and the environmental dynamics of individ...
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تاریخ انتشار 2004