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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1111/gcb.13187
|2 doi
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|a pubmed24n0851.xml
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|a (DE-627)NLM255508204
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|a (NLM)26661794
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Gomez-Casanovas, Nuria
|e verfasserin
|4 aut
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| 245 |
1 |
0 |
|a Nitrogen deposition and greenhouse gas emissions from grasslands
|b uncertainties and future directions
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| 264 |
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1 |
|c 2016
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| 336 |
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|a Text
|b txt
|2 rdacontent
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| 337 |
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 13.12.2016
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|a Date Revised 30.12.2016
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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| 520 |
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|a © 2015 John Wiley & Sons Ltd.
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|a Increases in atmospheric nitrogen deposition (Ndep) can strongly affect the greenhouse gas (GHG; CO2, CH4, and N2O) sink capacity of grasslands as well as other terrestrial ecosystems. Robust predictions of the net GHG sink strength of grasslands depend on how experimental N loads compare to projected Ndep rates, and how accurately the relationship between GHG fluxes and Ndep is characterized. A literature review revealed that the vast majority of experimental N loads were higher than levels these ecosystems are predicted to experience in the future. Using a process-based biogeochemical model, we predicted that low levels of Ndep either enhanced or reduced the net GHG sink strength of most grasslands, but as experimental N loads continued to increase, grasslands transitioned to a N saturation-decline stage, where the sensitivity of GHG exchange to further increases in Ndep declined. Most published studies represented treatments well into the N saturation-decline stage. Our model results predict that the responses of GHG fluxes to N are highly nonlinear and that the N saturation thresholds for GHGs varied greatly among grasslands and with fire management. We predict that during the 21st century some grasslands will be in the N limitation stage where others will transition into the N saturation-decline stage. The linear relationship between GHG sink strength and N load assumed by most studies can overestimate or underestimate predictions of the net GHG sink strength of grasslands depending on their N baseline status. The next generation of global change experiments should be designed at multiple N loads consistent with future Ndep rates to improve our empirical understanding and predictive ability
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Research Support, U.S. Gov't, Non-P.H.S.
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| 650 |
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4 |
|a CH4
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| 650 |
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4 |
|a N2O
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| 650 |
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4 |
|a grassland
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| 650 |
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4 |
|a methane
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| 650 |
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4 |
|a net ecosystem CO2 exchange
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| 650 |
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4 |
|a net ecosystem productivity
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| 650 |
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4 |
|a nitrogen deposition
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| 650 |
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4 |
|a nitrogen fertilization
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| 650 |
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4 |
|a nitrous oxide
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| 650 |
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4 |
|a uncertainty
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| 650 |
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7 |
|a Air Pollutants
|2 NLM
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| 650 |
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7 |
|a Carbon Dioxide
|2 NLM
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| 650 |
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7 |
|a 142M471B3J
|2 NLM
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| 650 |
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|a Nitrous Oxide
|2 NLM
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| 650 |
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7 |
|a K50XQU1029
|2 NLM
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| 650 |
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7 |
|a Nitrogen
|2 NLM
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| 650 |
|
7 |
|a N762921K75
|2 NLM
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| 650 |
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7 |
|a Methane
|2 NLM
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| 650 |
|
7 |
|a OP0UW79H66
|2 NLM
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| 700 |
1 |
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|a Hudiburg, Tara W
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Bernacchi, Carl J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Parton, William J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a DeLucia, Evan H
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Global change biology
|d 1999
|g 22(2016), 4 vom: 28. Apr., Seite 1348-60
|w (DE-627)NLM098239996
|x 1365-2486
|7 nnns
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| 773 |
1 |
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|g volume:22
|g year:2016
|g number:4
|g day:28
|g month:04
|g pages:1348-60
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| 856 |
4 |
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|u http://dx.doi.org/10.1111/gcb.13187
|3 Volltext
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|d 22
|j 2016
|e 4
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|c 04
|h 1348-60
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