Short term fluctuations in dissolved organic matter concentrations in streamflow draining a forested watershed and their relation to the catchment budget

1982 ◽  
Vol 7 (5) ◽  
pp. 417-425 ◽  
Author(s):  
I. D. L. Foster ◽  
I. C. Grieve
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Forested Watershed ◽  
Short Term ◽  
Catchment Budget

scholarly journals Short-Term Effects of Fertilization on Dissolved Organic Matter in Soil Leachate

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1617 ◽  
Author(s):  
Alexandra Tiefenbacher ◽  
Gabriele Weigelhofer ◽  
Andreas Klik ◽  
Matthias Pucher ◽  
Jakob Santner ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Sandy Loam ◽  
Organic Fertilizer ◽  
Molecular Size ◽  
Pig Slurry ◽  
Silt Loam ◽  
Short Term ◽  
Soil Leachate ◽  
Calcium Ammonium Nitrate

Besides the importance of dissolved organic matter (DOM) in soil biogeochemical processes, there is still a debate on how agricultural intensification affects the leaching of terrestrial DOM into adjacent aquatic ecosystems. In order to close this linkage, we conducted a short-term (45 day) lysimeter experiment with silt loam and sandy loam undisturbed/intact soil cores. Mineral (calcium ammonium nitrate) or organic (pig slurry) fertilizer was applied on the soil surface with a concentration equivalent to 130 kg N ha−1. On average, amounts of leached DOC over 45 days ranged between 20.4 mg (silt loam, mineral fertilizer) and 34.4 mg (sandy loam, organic fertilizer). Both, mineral and organic fertilization of a silt loam reduced concentration of dissolved organic carbon (DOC) in the leachate and shifted its composition towards a microbial-like signature (BIX) with a higher aromaticity (Fi) and a lower molecular size (E2:E3). However, in sandy loam only mineral fertilization affected organic matter leaching. There, lowered DOC concentrations with a smaller molecular size (E2:E3) could be detected. The overall effect of fertilization on DOC leaching and DOM composition was interrelated with soil texture and limited to first 12 days. Our results highlight the need for management measures, which prevent or reduce fast flow paths leading soil water directly into aquatic systems, such as surface flow, fast subsurface flow, or drainage water.

scholarly journals Comparison of Two PARAFAC Models of Dissolved Organic Matter Fluorescence for a Mid-Atlantic Forested Watershed in the USA

2013 ◽  
Vol 2013 ◽  
pp. 1-16 ◽  
Author(s):  
Shatrughan Singh ◽  
Shreeram Inamdar ◽  
Durelle Scott
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Specific Model ◽  
Forested Watershed ◽  
Strongly Correlated ◽  
Site Specific ◽  
The Usa ◽  
Study Sites ◽  
Model Components ◽  
A Site

The composition of dissolved organic matter (DOM) in a mid-Atlantic forested watershed was evaluated using two fluorescence models—one based on previously validated model (Cory and McKnight, 2005) and the other developed specifically for our study site. DOM samples for the models were collected from multiple watershed sources over a two-year period. The previously validated parallel factor analysis (PARAFAC) model had 13 DOM components whereas our site-specific model yielded six distinct components including two terrestrial humic-like, two microbial-derived humic-like, and two protein-like components. The humic-like components were highest in surficial watershed sources and decreased from soil water to groundwater whereas the protein-like components were highest for groundwater sources. Discriminant analyses indicated that our site-specific model was more sensitive to subtle differences in DOM and the sum of the humic- and protein-like constituents yielded more pronounced differences among watershed sources as opposed to the prevalidated model. Dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) concentrations and selected DOM metrics were also more strongly correlated with the site-specific model components. These results suggest that while the pre-validated model may capture broader trends in DOM composition and allow comparisons with other study sites, a site-specific model will be more sensitive for characterizing within-site differences in DOM.

scholarly journals Short-Term Dynamics of North Sea Bacterioplankton-Dissolved Organic Matter Coherence on Molecular Level

2016 ◽  
Vol 7 ◽  
Author(s):  
Judith Lucas ◽  
Irina Koester ◽  
Antje Wichels ◽  
Jutta Niggemann ◽  
Thorsten Dittmar ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
North Sea ◽  
Molecular Level ◽  
Short Term

scholarly journals Simulating streamflow and dissolved organic matter export from a forested watershed

2012 ◽  
Vol 48 (5) ◽  
Author(s):  
Na Xu ◽  
James E. Saiers ◽  
Henry F. Wilson ◽  
Peter A. Raymond
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Forested Watershed

Short term temporal variability in the photochemically mediated alteration of chromophoric dissolved organic matter (CDOM) in rainwater

2012 ◽  
Vol 50 ◽  
pp. 112-119 ◽  
Author(s):  
Robert J. Kieber ◽  
Mary Beth Adams ◽  
Joan D. Willey ◽  
Robert F. Whitehead ◽  
G. Brooks Avery ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Temporal Variability ◽  
Chromophoric Dissolved Organic Matter ◽  
Short Term

scholarly journals Supplementary material to "Short-term effects of fertilization on dissolved organic matter (DOM) in soil leachate"

2020 ◽  
Author(s):  
Alexandra Tiefenbacher ◽  
Gabriele Weigelhofer ◽  
Andreas Klik ◽  
Matthias Pucher ◽  
Jakob Santner ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Short Term ◽  
Soil Leachate ◽  
Supplementary Material ◽  
Short Term Effects
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