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Sökning: L773:2169 8953 OR L773:2169 8961 > Stable Carbon Isoto...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004430naa a2200565 4500
001oai:gup.ub.gu.se/265477
003SwePub
008240528s2018 | |||||||||||000 ||eng|
0247 a https://gup.ub.gu.se/publication/2654772 URI
0247 a https://doi.org/10.1002/2017jg0040832 DOI
040 a (SwePub)gu
041 a eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Campeau, A.4 aut
2451 0a Stable Carbon Isotopes Reveal Soil-Stream DIC Linkages in Contrasting Headwater Catchments
264 c 2018-01-22
264 1b American Geophysical Union (AGU),c 2018
520 a Large CO2 evasion to the atmosphere occurs as dissolved inorganic carbon (DIC) is transported from soils to streams. While this physical process has been the focus of multiple studies, less is known about the underlying biogeochemical transformations that accompany this transfer of C from soils to streams. Here we used patterns in stream water and groundwater C-13-DIC values within three headwater catchments with contrasting land cover to identify the sources and processes regulating DIC during its transport. We found that although considerable CO2 evasion occurs as DIC is transported from soils to streams, there were also other processes affecting the DIC pool. Methane production and mixing of C sources, associated with different types and spatial distribution of peat-rich areas within each catchment, had a significant influence on the C-13-DIC values in both soils and streams. These processes represent an additional control on C-13-DIC values and the catchment-scale cycling of DIC across different northern landscape types. The results from this study demonstrate that the transport of DIC from soils to streams results in more than just rapid CO2 evasion to the atmosphere but also represents a channel of C transformation, which questions some of our current conceptualizations of C cycling at the landscape scale. Plain Language Summary Large carbon dioxide emission to the atmosphere occurs as rainwater percolates through soils and into streams. This physical process is important for the global carbon cycle and has been the focus of multiple studies. However, less is known about the underlying processes that accompanies this transfer of carbon dioxide from soils to streams. Here we analyze the stable isotope composition of soil and stream carbon dioxide and demonstrate that methane production and mixing of carbon sources also occur in soils and streams. These processes were linked to different types and configurations of peat-rich areas, for example, bogs, fens, and riparian zones, found within each of the three studied catchments. Our results therefore demonstrate that the export of carbon dioxide from soils to streams not only results in emissions to the atmosphere but also represents a channel of transformation. This questions some of our current conceptualization of the catchment-scale cycling of carbon dioxide.
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Geofysik0 (SwePub)105052 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Geophysics0 (SwePub)105052 hsv//eng
653 a stable C isotopes
653 a carbon dioxide
653 a dissolved inorganic carbon
653 a methane
653 a soil
653 a stream
653 a dissolved inorganic carbon
653 a organic-carbon
653 a boreal landscape
653 a gaseous
653 a carbon
653 a peatland catchment
653 a amazonian rivers
653 a cycle research
653 a co2
653 a dioxide
653 a methane
7001 a Bishop, K.4 aut
7001 a Nilsson, M. B.4 aut
7001 a Klemedtsson, Leif,d 1953u Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences4 aut0 (Swepub:gu)xklele
7001 a Laudon, H.4 aut
7001 a Leith, F. I.4 aut
7001 a Oquist, M.4 aut
7001 a Wallin, M. B.4 aut
7102 a Göteborgs universitetb Institutionen för geovetenskaper4 org
7730 t Journal of Geophysical Research-Biogeosciencesd : American Geophysical Union (AGU)g 123:1, s. 149-167q 123:1<149-167x 2169-8953x 2169-8961
8564 8u https://gup.ub.gu.se/publication/265477
8564 8u https://doi.org/10.1002/2017jg004083

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