Influence of soil frost on the character and degradability of dissolved organic carbon in boreal forest soils
(2016) In Journal of Geophysical Research - Biogeosciences 121(3). p.829-840- Abstract
- Recent studies suggest that increases in extent and duration of winter soil frost increases dissolved organic carbon (DOC) concentrations in boreal riparian soils and connected aquatic systems during the subsequent spring and summer. However, little is known about the impact of frost on DOC character and its degradability. We applied three experimental treatments to riparian soils in northern Sweden—shallow soil frost (insulated), deep soil frost (snow removed) and control plots—to test the effect of different soil frost regimes on the chemical characteristics and degradability of soil DOC. Soil pore water samples were analyzed using excitation-emission fluorescence (parallel factor analysis) combined with biological and photochemical... (More)
- Recent studies suggest that increases in extent and duration of winter soil frost increases dissolved organic carbon (DOC) concentrations in boreal riparian soils and connected aquatic systems during the subsequent spring and summer. However, little is known about the impact of frost on DOC character and its degradability. We applied three experimental treatments to riparian soils in northern Sweden—shallow soil frost (insulated), deep soil frost (snow removed) and control plots—to test the effect of different soil frost regimes on the chemical characteristics and degradability of soil DOC. Soil pore water samples were analyzed using excitation-emission fluorescence (parallel factor analysis) combined with biological and photochemical degradation experiments. We found that the absolute bacterial metabolic rates were significantly lower in samples from the shallow soil frost treatments, compared with the other treatments. Explorative multivariate analyses indicate that increasing soil frost is contributing to increased protein-like fluorescence and to increased biological degradability of the DOC. Our study shows that decreases in riparian soil frost due to climate warming may not only contribute to decreased riparian DOC concentrations but also lead to shifts in the DOC composition, resulting in decreased biodegradability (yet similar photodegradability) of the DOC that is exported from riparian soils to streams.
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Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/e16ecb61-13a6-4b11-9242-59358ad1884c
- author
- Panneer Selvam, Balathandayuthabani LU ; Laudon, Hjalmar ; Guillemette, Francois and Berggren, Martin LU
- organization
- publishing date
- 2016
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Geophysical Research - Biogeosciences
- volume
- 121
- issue
- 3
- pages
- 829 - 840
- publisher
- Wiley
- external identifiers
-
- scopus:84961267004
- wos:000374345000014
- ISSN
- 2169-8961
- DOI
- 10.1002/2015JG003228
- project
- Terrestrial export of labile dissolved organic carbon in a changing environment
- language
- English
- LU publication?
- yes
- id
- e16ecb61-13a6-4b11-9242-59358ad1884c
- date added to LUP
- 2016-04-29 13:04:00
- date last changed
- 2022-03-23 22:48:41
@article{e16ecb61-13a6-4b11-9242-59358ad1884c, abstract = {{Recent studies suggest that increases in extent and duration of winter soil frost increases dissolved organic carbon (DOC) concentrations in boreal riparian soils and connected aquatic systems during the subsequent spring and summer. However, little is known about the impact of frost on DOC character and its degradability. We applied three experimental treatments to riparian soils in northern Sweden—shallow soil frost (insulated), deep soil frost (snow removed) and control plots—to test the effect of different soil frost regimes on the chemical characteristics and degradability of soil DOC. Soil pore water samples were analyzed using excitation-emission fluorescence (parallel factor analysis) combined with biological and photochemical degradation experiments. We found that the absolute bacterial metabolic rates were significantly lower in samples from the shallow soil frost treatments, compared with the other treatments. Explorative multivariate analyses indicate that increasing soil frost is contributing to increased protein-like fluorescence and to increased biological degradability of the DOC. Our study shows that decreases in riparian soil frost due to climate warming may not only contribute to decreased riparian DOC concentrations but also lead to shifts in the DOC composition, resulting in decreased biodegradability (yet similar photodegradability) of the DOC that is exported from riparian soils to streams.<br/>}}, author = {{Panneer Selvam, Balathandayuthabani and Laudon, Hjalmar and Guillemette, Francois and Berggren, Martin}}, issn = {{2169-8961}}, language = {{eng}}, number = {{3}}, pages = {{829--840}}, publisher = {{Wiley}}, series = {{Journal of Geophysical Research - Biogeosciences}}, title = {{Influence of soil frost on the character and degradability of dissolved organic carbon in boreal forest soils}}, url = {{http://dx.doi.org/10.1002/2015JG003228}}, doi = {{10.1002/2015JG003228}}, volume = {{121}}, year = {{2016}}, }