WFRF:(Widerlund Anders)
Sökning: WFRF:(Widerlund Anders) > Nitrogen uptake and...
- 11 av 89
- Föregående post
- Nästa post
- Till träfflistan
Nitrogen uptake and cycling in Phragmites australis in a lake-receiving nutrient-rich mine water : a 15 N tracer study
-
- Chlot, Sara (författare)
- Luleå tekniska universitet,Geovetenskap och miljöteknik
-
- Widerlund, Anders (författare)
- Luleå tekniska universitet,Geovetenskap och miljöteknik
-
- Öhlander, Björn (författare)
- Luleå tekniska universitet,Geovetenskap och miljöteknik
- (creator_code:org_t)
- 2015-06-17
- 2015
- Engelska.
- Ingår i: Environmental Earth Sciences. - : Springer Science and Business Media LLC. - 1866-6280 .- 1866-6299. ; 74:7, s. 6027-6038
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Uptake and cycling of nitrogen (N) in the littoral zone of a lake-receiving nutrient-rich mine water located in Boliden, northern Sweden, was investigated. Stable isotope tracer solutions of 15N as NH4 + (NAM mesocosm) or NO3 − (NOX mesocosm) were added to mesocosms enclosing plants of common reed (Phragmites australis). The 15N abundance in various plant parts was measured at pre-defined time intervals over an experimental period of 22 days. During the course of the experiment, plant parts from the NAM mesocosms were significantly more enriched in 15N than plant parts from the NOX mesocosms. On day 13, Δδ15N values of the fine roots from the NAM mesocosms had reached +8220 ‰, while the maximum Δδ15N value in NOX roots was considerably lower at +4430 ‰. Using 15N values in macrophyte tissues present at the end of the experiment enabled calculations of uptake rates and % of tracer N recovered in the plant (%tracerNrecov). Maximum tracer uptake rates were higher for the NAM mesocosms (1.4 µg g−1 min−1 or 48 mg N m−2 d−1) compared to the NOX mesocosms (0.23 µg g−1 min−1 or 8.5 mg N m−2 d−1). Calculations of %tracerNrecov indicated that 1–8 and 25–44 % of added N was assimilated by plants in the NOX and NAM mesocosms, respectively. Hence, P. australis was more effective in assimilating NH4 +, and a larger portion of the tracer N accumulated in the roots compared to the other plant parts. Consequently, macrophyte N removal is most effective for cold-climate aquatic systems receiving mine water dominated by NH4 +. For permanent removal of N, the whole plant (including the roots) should be harvested.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
Nyckelord
- Applied Geology
- Tillämpad geologi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
- Environmental Earth Sciences (Sök värdpublikationen i LIBRIS)
Till lärosätets databas
- 11 av 89
- Föregående post
- Nästa post
- Till träfflistan
Hitta mer i SwePub
- Av författaren/redakt...
- Chlot, Sara
- Widerlund, Ander ...
- Öhlander, Björn
- Om ämnet
-
- NATURVETENSKAP
- NATURVETENSKAP
- och Geovetenskap och ...
- och Geokemi
- Artiklar i publikationen
- Environmental Ea ...
- Av lärosätet
- Luleå tekniska 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
