Sökning: onr:"swepub:oai:DiVA.org:umu-11343" >
Nitrogen uptake by ...
Nitrogen uptake by Hylocomium splendens during snowmelt in a boreal forest
-
Forsum, A. (författare)
-
- Laudon, Hjalmar (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
-
Nordin, A. (författare)
-
(creator_code:org_t)
- 2015-12-03
- 2008
- Engelska.
-
Ingår i: Ecoscience. - : Informa UK Limited. - 1195-6860. ; 15:3, s. 315-319
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.2...
-
visa färre...
Abstract
Ämnesord
Stäng
- In most boreal regions snow composes a large portion of the annual precipitation. Although many boreal forest floor bryophytes depend largely on precipitation for their nitrogen (N) supply, bryophyte uptake of snow N little explored. We studied chemical forms of plant-accessible N in snowmelt, as well as the temporal dynamics of their release. In conjuction we performed a N uptake experiment using the common boreal bryophyte Hylocomium splendens. the results demonstrated that the snowmelt N pool was dominated by NO3 (86%), followed by NH4+ (11%) and amino acid N (3%), in total providing ca 0.3 kg N.ha(-1) to the forest floor vegetation. Hylocomium splendens was able to access both inorganic and organic N-15 labelled N forms (NO3-, NH4+, and glycine) applied in situ to the snow covering the moss prior to snowmelt. Across all the N forms H. splendens took up ca 24% of the snow-deposited N. Nitrate uptake exceeded that of glycine, while NH4+ uptake was intermediate, reflecting the ambient distribution of the snowmelt N pool between plant-accessible N forms.
Ämnesord
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
Nyckelord
- amino acid N
- ammonium
- bryophyte ecophysiology
- nitrate
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas