Tyck till om SwePub Sök här!
onr:"swepub:oai:lup.lub.lu.se:261db4bd-e0e7-49c1-87a8-330cb3aeb437"
Sökning: onr:"swepub:oai:lup.lub.lu.se:261db4bd-e0e7-49c1-87a8-330cb3aeb437" > Nitrogen Isotope Pa...
- 1 av 1
- Föregående post
- Nästa post
- Till träfflistan
Nitrogen Isotope Patterns in Alaskan Black Spruce Reflect Organic Nitrogen Sources and the Activity of Ectomycorrhizal Fungi
- Mayor, Jordan R. (författare)
- Schuur, Edward A. G. (författare)
- Mack, Michelle C. (författare)
- visa fler...
- Hollingsworth, Terresa N. (författare)
- visa färre...
- (creator_code:org_t)
- 2012-05-17
- 2012
- Engelska.
- Ingår i: Ecosystems. - : Springer Science and Business Media LLC. - 1432-9840 .- 1435-0629. ; 15:5, s. 819-831
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Global patterns in soil, plant, and fungal stable isotopes of N (delta N-15) show promise as integrated metrics of N cycling, particularly the activity of ectomycorrhizal (ECM) fungi. At small spatial scales, however, it remains difficult to differentiate the underlying causes of plant delta N-15 variability and this limits the application of such measurements to better understand N cycling. We conducted a landscape-scale analysis of delta N-15 values from 31 putatively N-limited monospecific black spruce (Picea mariana) stands in central Alaska to assess the two main hypothesized sources of plant delta N-15 variation: differing sources and ECM fractionation. We found roughly 20% of the variability in black spruce foliar N and delta N-15 values to be correlated with the concentration and delta N-15 values of soil NH4 (+) and dissolved organic N (DON) pools, respectively. However, N-15-based mixing models from 24 of the stands suggested that fractionation by ECM fungi obscures the N-15 signature of soil N pools. Models, regressions, and N abundance data all suggested that increasing dependence on soil DON to meet black spruce growth demands predicates increasing reliance on ECM-derived N and that black spruce, on average, received 53% of its N from ECM fungi. Future research should partition the delta N-15 values within the soil DON pool to determine how choice of soil delta N-15 values influence modeled ECM activity. The C balance of boreal forests is tightly linked to N cycling and delta N-15 values may be useful metrics of changes to these connections.
Ämnesord
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Nyckelord
- 15N
- black spruce
- denitrifier method
- dissolved organic nitrogen
- ectomycorrhiza
- isotope fractionation
- mixing models
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
- 1 av 1
- Föregående post
- Nästa post
- Till träfflistan
Hitta mer i SwePub
- Av författaren/redakt...
- Mayor, Jordan R.
- Schuur, Edward A ...
- Mack, Michelle C ...
- Hollingsworth, T ...
- Bååth, Erland
- Om ämnet
-
- NATURVETENSKAP
- NATURVETENSKAP
- och Biologi
- Artiklar i publikationen
- Ecosystems
- Av lärosätet
- Lunds universitet
Sök utanför SwePub
- Sök vidare i:
- 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 - Nationella bibliotekssystem
- LIBRIS.kb.se
