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Global patterns and...
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Kardol, PaulSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management
(författare)
Global patterns and substrate-based mechanisms of the terrestrial nitrogen cycle
- Artikel/kapitelEngelska2016
Förlag, utgivningsår, omfång ...
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2016-03-02
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Wiley,2016
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Wiley: 12 months,2024
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LIBRIS-ID:oai:slubar.slu.se:76195
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https://res.slu.se/id/publ/76195URI
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https://doi.org/10.1111/ele.12591DOI
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Språk:engelska
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Sammanfattning på:engelska
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Nitrogen (N) deposition is impacting the services that ecosystems provide to humanity. However, the mechanisms determining impacts on the N cycle are not fully understood. To explore the mechanistic underpinnings of N impacts on N cycle processes, we reviewed and synthesised recent progress in ecosystem N research through empirical studies, conceptual analysis and model simulations. Experimental and observational studies have revealed that the stimulation of plant N uptake and soil retention generally diminishes as N loading increases, while dissolved and gaseous losses of N occur at low N availability but increase exponentially and become the dominant fate of N at high loading rates. The original N saturation hypothesis emphasises sequential N saturation from plant uptake to soil retention before N losses occur. However, biogeochemical models that simulate simultaneous competition for soil N substrates by multiple processes match the observed patterns of N losses better than models based on sequential competition. To enable better prediction of terrestrial N cycle responses to N loading, we recommend that future research identifies the response functions of different N processes to substrate availability using manipulative experiments, and incorporates the measured N saturation response functions into conceptual, theoretical and quantitative analyses.
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Sveriges lantbruksuniversitetInstitutionen för skogens ekologi och skötsel
(creator_code:org_t)
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Sveriges lantbruksuniversitet
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Ingår i:Ecology Letters: Wiley19, s. 697-7091461-023X1461-0248
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