onr:"swepub:oai:lup.lub.lu.se:30be3f4d-9bf9-4738-840d-1491d9f92d36"
Search: onr:"swepub:oai:lup.lub.lu.se:30be3f4d-9bf9-4738-840d-1491d9f92d36" > Contrasting above- ...
- 1 of 1
- Previous record
- Next record
- To hitlist
- Blok, DaanLund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science,University of Copenhagen (author)
Contrasting above- and belowground organic matter decomposition and carbon and nitrogen dynamics in response to warming in High Arctic tundra
- Article/chapterEnglish2018
Publisher, publication year, extent ...
- 2018-01-07
- Wiley,2018
- 13 s.
Numbers
- LIBRIS-ID:oai:lup.lub.lu.se:30be3f4d-9bf9-4738-840d-1491d9f92d36
- https://lup.lub.lu.se/record/30be3f4d-9bf9-4738-840d-1491d9f92d36URI
- https://doi.org/10.1111/gcb.14017DOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- Tundra regions are projected to warm rapidly during the coming decades. The tundra biome holds the largest terrestrial carbon pool, largely contained in frozen permafrost soils. With warming, these permafrost soils may thaw and become available for microbial decomposition, potentially providing a positive feedback to global warming. Warming may directly stimulate microbial metabolism but may also indirectly stimulate organic matter turnover through increased plant productivity by soil priming from root exudates and accelerated litter turnover rates. Here, we assess the impacts of experimental warming on turnover rates of leaf litter, active layer soil and thawed permafrost sediment in two high-arctic tundra heath sites in NE-Greenland, either dominated by evergreen or deciduous shrubs. We incubated shrub leaf litter on the surface of control and warmed plots for 1 and 2 years. Active layer soil was collected from the plots to assess the effects of 8 years of field warming on soil carbon stocks. Finally, we incubated open cores filled with newly thawed permafrost soil for 2 years in the active layer of the same plots. After field incubation, we measured basal respiration rates of recovered thawed permafrost cores in the lab. Warming significantly reduced litter mass loss by 26% after 1 year incubation, but differences in litter mass loss among treatments disappeared after 2 years incubation. Warming also reduced litter nitrogen mineralization and decreased the litter carbon to nitrogen ratio. Active layer soil carbon stocks were reduced 15% by warming, while soil dissolved nitrogen was reduced by half in warmed plots. Warming had a positive legacy effect on carbon turnover rates in thawed permafrost cores, with 10% higher respiration rates measured in cores from warmed plots. These results demonstrate that warming may have contrasting effects on above- and belowground tundra carbon turnover, possibly governed by microbial resource availability.
Subject headings and genre
- NATURVETENSKAP Geovetenskap och miljövetenskap Klimatforskning hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Climate Research hsv//eng
- NATURVETENSKAP Geovetenskap och miljövetenskap Miljövetenskap hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Environmental Sciences hsv//eng
- arctic
- carbon
- climate warming
- decomposition
- litter
- permafrost
- respiration
- soil
- tundra
Added entries (persons, corporate bodies, meetings, titles ...)
- Faucherre, Samuel (author)
- Banyasz, ImreUniversity of Copenhagen (author)
- Rinnan, RiikkaUniversity of Copenhagen(Swepub:lu)mbio-rra (author)
- Michelsen, AndersUniversity of Copenhagen (author)
- Elberling, BoUniversity of Copenhagen (author)
- Institutionen för naturgeografi och ekosystemvetenskapNaturvetenskapliga fakulteten (creator_code:org_t)
Related titles
- In:Global Change Biology: Wiley24:6, s. 2660-26721354-1013
Internet link
Find in a library
- Global Change Biology (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Blok, Daan
- Faucherre, Samue ...
- Banyasz, Imre
- Rinnan, Riikka
- Michelsen, Ander ...
- Elberling, Bo
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Earth and Relate ...
- and Climate Research
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Earth and Relate ...
- and Environmental Sc ...
- Articles in the publication
- Global Change Bi ...
- By the university
- Lund University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
