Land use and hydrologic flowpaths interact to affect dissolved organic matter and nitrate dynamics
نویسندگان
چکیده
منابع مشابه
Use of dissolved organic matter to support hydrologic investigations in a permafrost-dominated watershed
Pyrolysis-gas chromatography/mass spectrometry (py-GC/MS) is an analytical tool used to produce a ‘‘fingerprint’’ of dissolved organic matter (DOM) in water. Py-GC/MS fingerprinting was used in this research to lend insight into the complex subsurface hydrology of a permafrost-dominated watershed near Fairbanks, AK. Fingerprinting analysis was conducted on groundwater, artesian spring, and stre...
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Chromophoric dissolved organic matter (CDOM) is a ubiquitous component of the open ocean dissolved matter pool, and is important owing to its influence on the optical properties of the water column, its role in photochemistry and photobiology, and its utility as a tracer of deep ocean biogeochemical processes and circulation. In this review, we discuss the global distribution and dynamics of CD...
متن کاملFluorescence index as an indicator of dissolved organic carbon quality in hydrologic flowpaths of forested tropical watersheds
Over two hundred samples were collected in tropical headwater forested catchments in the lowland Amazon basin near Juruena, Mato Grosso Brazil. These were analyzed for fluorescence characteristics and DOC concentrations, and represented a range of terrestrial hydrologic flowpaths and firstorder streams during baseflow and stormflow conditions. The fluorescence index (FI) of McKnight et al. (200...
متن کاملPhotochemical andmicrobial alteration of dissolved organic matter in temperate headwater streams associated with different land use
[1] Photochemical and microbial transformations of DOM were evaluated in headwater streams draining forested and human-modified lands (pasture, cropland, and urban development) by laboratory incubations. Changes in DOC concentrations, DOC isotopic signatures, and DOM fluorescence properties were measured to assess the amounts, sources, ages, and properties of reactive and refractory DOM under t...
متن کاملEffects of nitrate and phosphate supply on chromophoric and fluorescent dissolved organic matter
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ژورنال
عنوان ژورنال: Biogeochemistry
سال: 2014
ISSN: 0168-2563,1573-515X
DOI: 10.1007/s10533-014-9983-0